GLT240128
Technical Manual
Revision: 1.2
Contents
Contents
1
2
3
4
ii
Getting Started
1.1 Display Options Available . . . . . . . . .
1.2 Accessories . . . . . . . . . . . . . . . . .
1.3 Features . . . . . . . . . . . . . . . . . . .
1.4 Connecting to a PC . . . . . . . . . . . . .
1.4.1 Connection for Non-USB Modules
1.4.2 Connection for USB Modules . . .
1.5 Installing the Software . . . . . . . . . . .
1.5.1 MOGD# . . . . . . . . . . . . . .
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1
1
2
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5
5
5
Hardware Information
2.1 Communication Connectors . . . . . . . . . . . . . . . .
2.1.1 Power/Data Connector for Non-USB modules only
2.1.2 USB Connector for USB modules only . . . . . .
2.2 Touchpad Interface Connector . . . . . . . . . . . . . . .
2.3 DB-9 Connector for Non-USB modules only . . . . . . .
2.4 Power Through DB-9 Jumper . . . . . . . . . . . . . . . .
2.5 Optional USB Header for USB modules only . . . . . . .
2.6 Protocol Select Jumpers . . . . . . . . . . . . . . . . . . .
2.7 Filesystem Lock Jumper . . . . . . . . . . . . . . . . . .
2.8 Manual Override . . . . . . . . . . . . . . . . . . . . . .
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6
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14
Troubleshooting
3.1 The display does not turn on when power is applied. . . . . . . . . . . . .
3.2 The display module is not communicating. . . . . . . . . . . . . . . . . .
3.3 The display module is communicating, however text cannot be displayed.
3.4 There is a problem uploading fonts or bitmaps. . . . . . . . . . . . . . .
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21
Communications
4.1 Introduction . . . . . . . . . . . . . .
4.1.1 I2 C Communication Summary
4.1.2 I2 C Transaction Example . . .
4.1.3 Serial Communication . . . .
4.1.4 USB Communication . . . . .
4.2 Turn Flow Control On . . . . . . . .
4.3 Turn Flow Control Off . . . . . . . .
4.4 Changing the I2 C Slave Address . . .
4.5 Changing the Baud Rate . . . . . . .
4.6 Setting a Non-Standard Baud Rate . .
Matrix Orbital
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GLT240128
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ii
5
6
7
8
9
Fonts
5.1 Introduction . . . . . . .
5.1.1 Font File Format
5.1.2 Creating a Font .
5.2 Uploading a Font File . .
5.3 Setting the Current Font .
5.4 Font Metrics . . . . . . .
5.5 Set Box Space Mode . .
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26
Text
6.1 Introduction . . . . . . . . . .
6.1.1 Character Set . . . . .
6.1.2 Control Characters . .
6.2 Move Cursor Home . . . . . .
6.3 Setting the Cursor Position . .
6.4 Setting the Cursor Coordinate
6.5 Auto Scroll On . . . . . . . .
6.6 Auto Scroll Off . . . . . . . .
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26
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27
28
Bitmaps
7.1 Introduction . . . . . . . . . . .
7.2 Uploading a Bitmap File . . . .
7.3 Drawing a Bitmap from Memory
7.4 Drawing a Bitmap Directly . . .
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28
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30
Bar Graphs and Drawing
8.1 Introduction . . . . . . . .
8.2 Set Drawing Color . . . .
8.3 Draw Pixel . . . . . . . .
8.4 Drawing a Line . . . . . .
8.5 Continue a Line . . . . . .
8.6 Draw a Rectangle . . . . .
8.7 Drawing a Solid Rectangle
8.8 Initializing a Bar Graph . .
8.9 Drawing a Bar Graph . . .
8.10 Initializing a Strip Chart .
8.11 Shifting a Strip Chart . . .
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34
34
35
Touchpad
9.1 Introduction . . . . . . . . .
9.1.1 Region Mode . . . .
9.1.2 Co-ordinate Mode .
9.2 Set Touch Region . . . . . .
9.3 Delete Touch Region . . . .
9.4 Delete All Touch Regions . .
9.5 Set Touch Mode . . . . . . .
9.6 Set Region Reporting Mode
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36
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37
38
38
Matrix Orbital
GLT240128
iii
9.7
9.8
9.9
Set Dragging Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Pressure Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Run Touchpad Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Display Functions
10.1 Introduction . . . . . . .
10.2 Clear Screen . . . . . . .
10.3 Display On . . . . . . .
10.4 Display Off . . . . . . .
10.5 Set Brightness . . . . . .
10.6 Set and Save Brightness .
10.7 Set Contrast . . . . . . .
10.8 Set and Save Contrast . .
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40
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42
11 Filesystem
11.1 Introduction . . . . . . . . . . . .
11.1.1 File Upload Protocol . . .
11.1.2 XModem Upload Protocol
11.2 Wipe Filesystem . . . . . . . . .
11.3 Deleting a File . . . . . . . . . . .
11.4 Get Filesystem Space . . . . . . .
11.5 Get Filesystem Directory . . . . .
11.6 Filesystem Upload . . . . . . . .
11.7 Downloading a File . . . . . . . .
11.8 Moving a File . . . . . . . . . . .
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43
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49
12 Data Security
12.1 Introduction . . . . . .
12.2 Set Remember . . . . .
12.3 Data Lock . . . . . . .
12.4 Set and Save Data Lock
12.5 Dump the Filesystem .
12.6 Write Customer Data .
12.7 Read Customer Data .
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49
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52
13 Miscellaneous
13.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2 Read Version Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.3 Read Module Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
53
53
53
53
14 Command Summary
14.1 Communications . . . .
14.2 Fonts . . . . . . . . . .
14.3 Text . . . . . . . . . . .
14.4 Bitmaps . . . . . . . . .
14.5 Bar Graphs and Drawing
14.6 Touchpad . . . . . . . .
55
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56
57
Matrix Orbital
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GLT240128
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iv
14.7 Display Functions . . .
14.8 Filesystem . . . . . . .
14.9 Data Security . . . . .
14.10Miscellaneous . . . . .
14.11Command By Number
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57
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59
15 Appendix
15.1 Optical Characteristics . .
15.2 Specifications . . . . . . .
15.2.1 Environmental . .
15.2.2 Electrical . . . . .
15.2.3 Touch . . . . . . .
15.3 Physical Layout . . . . . .
15.4 Ordering Information . . .
15.5 Definitions . . . . . . . . .
15.6 Contacting Matrix Orbital .
15.7 Revision History . . . . .
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61
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64
64
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65
Matrix Orbital
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GLT240128
v
1
Getting Started
The GLT240128 is an intelligent graphic LCD display designed to decrease development time by providing an instant touch screen solution to any project. With the ability to communicate via serial RS-232
protocol at regular and TTL levels as well as USB and I2 C, the versatile GLT240128 can be used with virtually any controller. The ease of use is further enhanced by an intuitive command structure to allow display
settings such as backlight brightness, contrast and baud rate to be software controlled. Additionally, text and
fonts may be uploaded to the display and stored in the on board memory. Finally, simple touch commands
allow for the seemless integration of user control into the display environment.
1.1
Display Options Available
The GLT240128 comes in three backlight options, grey text on a white backlight, white text with a blue
backlight, and standard grey text on a yellow-green backlight . Extended voltage options are also available
to allow you to select the display which will best fit your project needs. Please see table 81 for ordering
information.
Figure 1: GLT240128 Options
Matrix Orbital
GLT240128
1
1.2
Accessories
NOTE Matrix Orbital provides all the interface accessories needed to get your display
up and running. You will find these accessories and others on our e-commerce website
at http://www.matrixorbital.com. To contact a sales associate see Section 15.6 for contact
information.
Figure 2: 5V Power Adapter
Matrix Orbital
Figure 3: 12V Power Adaptor (-V/-VPT)
GLT240128
2
1.3
Figure 4: 3ft Mini-B USB Cable
Figure 5: Breadboard Cable
Figure 6: Communication & Power Cable
Figure 7: Serial Cable
Features
• 240 x 128 pixel graphics display
• Integrated Touchpad Overlay
• Selectable communication protocol, RS-232, TTL, and I2 C for Non-USB models; USB only for USB
models
Matrix Orbital
GLT240128
3
•
•
•
•
•
•
•
•
1.4
128 byte buffered communication
16 KB flash memory for fonts and bitmaps
Lightning fast communication speeds, up to 115 kbps for Serial and 100 kbps for I2 Cprotocol
* Use of up to 127 modules on the same 2 wire I2 C interface
Display text using built in or user supplied fonts
Software adjustable contrast and backlight brightness
Default 19.2 kbps serial communication speed
Extended voltage, and efficient power supply available
Connecting to a PC
The GLT240128 connects seamlessly to a PC and it is an excellent means of testing the functionality
and uploading new fonts and bitmaps. For the Non-USB version, you will require a standard RS-232 9-pin
serial cable such as the one pictured in Figure 7, as well as a modified 5V or 12V power adapter, depending
on the voltage model, such as the ones pictured in Figures 2 and 3. For the USB model, of course, all you
will need is a USB to mini USB cable such as the one in Figure 4.
1.4.1 Connection for Non-USB Modules
In order to connect your Non-USB display to a personal computer follow these easy instructions:
1. Plug the serial cable into the com port you wish to use.
2. Connect the appropraite modified power adapter to a power lead from your PC power supply (you will
have to open your computer case).
3. Connect the serial cable to the DB-9 connector on the back of the display.
4. Connect the appropriate power adapter to the 4-pin connector on the back of the display.
WARNING DO NOT use the standard floppy drive power connector on
the Power/Data Connector, as this will not provide you with the correct
voltage and will damage the display module.
Matrix Orbital
GLT240128
4
Figure 8: PC vs Matrix Orbital Display Module Wiring
1.4.2 Connection for USB Modules
In order to connect your USB display to a personal computer simply plug the mini-B USB cable, such
as that shown in Figure 4 from the PC to the USB connector on the display.
1.5
Installing the Software
1.5.1 MOGD#
MOGD# is the latest updated version of MOGD and can be used to manage font and graphics downloads
as well as exercise all of the features of our graphical displays. MOGD# provides a new user friendly
interface as well as many feature enhancements.
To install MOGD# from the Matrix Orbital website, follow the following steps:
1.
2.
3.
4.
5.
Go to the website location: http://www.matrixorbital.ca/software/software_graphic/MOGDsharp/
Click on "Download Here"
Locate the file MogdSharp.zip on your desktop
Unzip MogdSharp.zip to a temporary directory using a program such as Winzip
Double click on "setup.exe"
Matrix Orbital
GLT240128
5
6. Follow the instructions on the screen to complete the installation
7. MOGD# requires the .NET framework 2.0 and will download and install it automatically
After the installation is complete there will be a Matrix Orbital entry under "Start->Programs->Matrix Orbital" in the start menu. Click on the ’Mogd Sharp’ entry to run the program.
Be sure to check the information selected in the configuration panel the first time MOGD# is run. Once
this information is entered correctly the program can be used to control all functions of the graphic display.
Port The serial port the display is plugged in to.
Speed The communication speed the display module is set to.
(Default 19,200)
Display Type The type of display (GLT240128)
PCB Revision The revision of the display you are using.
(Found on the back of the PCB).
Figure 9: Mogd Sharp Settings
• Winzip is available as a free download from http://www.winzip.com
2
Hardware Information
Refer to the following diagram for this chapter:
Matrix Orbital
GLT240128
6
1 Power/Data Connector
2 Touchpad Header
3 DB9 Connector
4 Power Through DB9 Jumper
5 Protocol Select Jumpers
6 Filesystem Lock Jumper
7 Manual Override Jumper
Figure 10: GLT240128 Non-USB
Matrix Orbital
GLT240128
7
1 USB Connector
2 Touchpad Header
3 Optional USB Header
4 Protocol Select Jumpers
5 Filesystem Lock Jumper
6 Manual Override Jumper
Figure 11: GLT240128 USB
2.1
Communication Connectors
2.1.1 Power/Data Connector for Non-USB modules only
The Power/Data Connector provides a standard connector for powering the display module. The GLT240128
requires five volts for the standard display module, between nine to fifteen for the wide voltage (V) model,
and between nine to thirty-five volts for the wide voltage with efficient power supply module (VPT). The
voltage is applied through pins one and four of the four pin Power/Data Connector. Pins two and three are
reserved for serial transmission, using either the RS-232 or TTL protocol levels, depending on what has been
selected by the Protocol Select Jumpers.
Matrix Orbital
GLT240128
8
Pin 1
Pin 2
Pin 3
Pin 4
GND
Tx/SDA (I2 C data)
Rx/SCL (I2 C clock)
Vcc (see table 78 on page 62)
Figure 12: Power Connector and Pin-out
2.1.2 USB Connector for USB modules only
The USB Connector provides a standard connector for powering and communicating to the USB display
module. As with the non-USB version, the GLT240128-USB requires five volts for the standard display
module as per table 78.
Figure 13: USB Connector for GLT240128
Matrix Orbital
GLT240128
9
2.2
Touchpad Interface Connector
The GLT240128 provides a Touchpad Interface Connector which allows for the touchpad to be interfaced
to the display. This connector should remain plugged in while the unit is in operation and should not be
tampered with in any way.
Figure 14: Touchpad Interface Connector
2.3
DB-9 Connector for Non-USB modules only
The GLT240128 provides a DB-9 Connector to readily interface with serial devices which use the
EIA232 standard signal levels of ±9V. It is also possible to communicate at TTL levels of 0 to +5V by
setting the Protocol Select Jumpers to TTL. As an added feature it is also possible to apply power through
pin 9 of the DB-9 Connector in order to reduce cable clutter. However, in order to accomplish this you must
set the Power Through DB-9 Jumper.
Matrix Orbital
GLT240128
10
Pin 2
Pin 3
Pin 5
Pin 9
RX/SCL (I2 C clock)
TX/SDA (I2 C data)
GND
PWR (Must solder power through DB-9 jumper. See table 78
Figure 15: RS-232 Pin-out
2.4
Power Through DB-9 Jumper
In order to provide power through pin 9 of the DB-9 Connector you must place a solder jumper on the
Power through DB-9 Jumper pictured in Figure 16 below. The GLT240128 allows all voltage models to use
the power through DB-9 option, see table 78 for display module voltage requirements.
Figure 16: Power Through DB-9 Jumper
WARNING Do not apply voltage through pin 9 of the DB-9 connector
AND through the Power/Data Connector at the same time.
NOTE We do not recommend that you use pin 9 (Ring Indicator) of the PC to power the
display module. You will have to make a special DB9 cable.
Matrix Orbital
GLT240128
11
2.5
Optional USB Header for USB modules only
The GLT240128 USB version has an optional four pin header for internal USB communications with
host units. This provides the same communication lines as the regular header, albeit in a different form factor
for greater customization. Again, please 78 see for power requirements.
Pin 1
Pin 2
Pin 3
Pin 4
GND
D+
DVcc (see table 78 on page 62)
Figure 17: Optional Internal USB Header
2.6
Protocol Select Jumpers
The Protocol Select Jumpers, pictured below in Figure 18, provide the means necessary to toggle the
display module between RS-232 and TTL protocol levels. As a default for Non-USB modules, the jumpers
are set to RS-232 mode with zero ohm resistors on the 232 jumpers. In order to place the display module in
I2 C mode you must first remove the zero ohm resistors from the 232 jumpers and then solder the resistors
on to the I2 C jumpers, or bridge solder across the pads. The display will now be in I2 C mode and have a
default slave address of 0x50 unless the I2 C address has been changed. Similarly, in order to change the
display to TTL mode, simply remove the zero ohm resistors from the 232 or I2 C jumpers and solder them
to the TTL jumpers. Although RS-232, USB, TTL and I2 C are present, only 232/TTL/I2C are for use in the
Non-USB module. For the USB module operation the USB jumpers must be in place. There are three, one
is for power. If you wish to power it up from a non-USB source, you must remove one of the jumpers. The
jumper to remove is the rightmost USB jumper as seen if Figure 19.
Matrix Orbital
GLT240128
12
Figure 18: Protocol Select Jumpers for Serial and I2 C modules
Figure 19: Protocol Jumpers for USB modules
2.7
Filesystem Lock Jumper
The Filesystem Lock Jumper allows you to lock the filesystem on the GLT240128 so that no fonts or
bitmaps can be either written or deleted from the on board memory. This feature is useful in order to protect
data integrity of production units, if protection of other settings is required see Section 12
To lock the filesystem, solder a zero ohm resistor or use a solder jumper pictured in Figure 20 below.
Matrix Orbital
GLT240128
13
Figure 20: Filesystem Lock Jumper
2.8
Manual Override
The Manual Override is provided to allow the GLT240128 to be reset to some of the factory defaults.
This can be particularly helpful if the display module has been set to an unknown baud rate or I2 C and you
are no longer able to communicate with it. If you wish to return the module to its default settings you must:
1.
2.
3.
4.
5.
Power off the display module.
Place a Jumper on the Manual Override pins, as pictured below.
Power up the display module.
The display module is now set to its default values listed below in table 1.
Edit and save settings.
Figure 21: Manual Override Jumper
Matrix Orbital
GLT240128
14
Table 1: Default Values
Contrast
128
Backlight
255
Baud Rate 19.2 kbps
Data Lock
False
NOTE The display module will revert back to the old settings once turned off, unless the
settings are saved.
3
Troubleshooting
3.1
The display does not turn on when power is applied.
• First, you will want to make sure that you are using the correct power connector. Standard floppy drive
power cables from your PC power supply may fit on the Power/Data Connector however they do not
have the correct pinout as can be seen in Figure ??. Matrix Orbital supplies power cable adapters for
connecting to a PC, which can be found in the Accessories Section on page 2.
• The next step is to check the power cable which you are using for continuity. If you don’t have an
ohm meter, try using a different power cable, if this does not help try using a different power supply.
• The last step will be to check the Power / Data Connector on the GLT240128. If the Power / Data
Connector has become loose, or you are unable to resolve the issue, please contact Matrix Orbital
see 15.6 on page 64 for contact information.
3.2
The display module is not communicating.
• First, check the communication cable for continuity. If you don’t have an ohm meter, try using a
different communication cable. If you are using a PC try using a different Com port.
• Second, please ensure that the display module is set to communicate on the protocol that you are
using, by checking the Protocol Select Jumpers. To change the protocol used by the display module
see Section 2.6 on page 12.
• Third, ensure that the host system and display module are both communicating on the same baud rate.
The default baud rate for the display module is 19200 bps.
• * If you are communicating to the display via I2 C please ensure that the data is being sent to the
correct address. The default slave address for the display module is 0x50.
NOTE I2 C communication will always require pull up resistors.
• Finally, you may reset the display to it’s default settings using the Manual Override Jumper, see
Section 2.8 on the preceding page.
Matrix Orbital
GLT240128
15
3.3
The display module is communicating, however text cannot
be displayed.
• The cause of this is often that no font has been loaded onto the display. To load a font onto the display
see Section 4.2.1 on page 16.
• Another common cause may be that the contrast settings have been set to low. The solution to this
problem is to adjust the contrast settings, the default setting that will work in most environments is
128
NOTE Optimal contrast settings may vary according to factors such as temperature, viewing angle and lighting conditions.
3.4
There is a problem uploading fonts or bitmaps.
• First, ensure that you can communicate to the display. A good test is to use a PC, with MOGD#
installed, to connect to the display. See Section 1.4 on page 4for setting up a PC to test the GLT240128.
• Second, ensure that the Filesystem Lock Jumper has not been set. See Section 2.7 on page 13.
• Third, please ensure that the display module’s memory is not full. The GLT240128 has 16 Kb of
memory for fonts and bitmaps.
NOTE If you are unable to resolve any issue please contact Matrix Orbital. See 15.6 on
page 64 for contact information.
4
Communications
4.1
Introduction
The commands listed in this chapter describe how to configure data flow on the GLT24064.
4.1.1 I2 C Communication Summary
The GLT24064 is capable of communicating at 100 KHz in I2 C mode, with 127 units addressable on a
single I2 C communication line. However, in order to communicate via I2 C you must first ensure that pull up
resistors, with a nominal value of 1K to 10K, are placed on the SCL and SDA communication lines coming
from pins two and three of the Data / Power Connector respectively. Data responses by the module are
automatically output via RS232, in case the host will be querying the module, it is necessary for the host
to inform the module that its responses are to be output via I2 C. This can be done by sending command
254 /160 / 0 to turn off auto transmission of data in RS232. This will keep the data in the buffer until the
master clocks a read of the slave. The I2 C data lines operate at 5V normally or 3.3V for -1U style units. The
GLT24064 uses 8-bit addressing, with the 8th or Least Significant Bit (LSB) bit designated as the read/write
Matrix Orbital
GLT240128
16
bit, a 0 designates a write address and a 1 designates a read address. The default read address of the display
module will be 0x51, whereas the write address is 0x50 by default. This address may be changed by using
cmd 254 / 51 / . The GLT24064 should only be sent addresses that are even (LSB is 0). When the
I2 C master wishes to write to the display, the effective address is $50 (0101 0000) , since the LSB has to be
0 for an I2 C master write. When the I2 C master wishes to read the GLT24064, the effective address is $51
(0101 0001), since the LSB has to be 1 for an I2 C master read.
If we take a standard Phillips 7 bit address of $45 (100 0101), Matrix Orbital’s GLT24064 would describe
this Phillips I2 C address as $8A (1000 1010). The read address would be $8B (1000 1011).
The unit does not respond to general call address ($00).
When communicating in I2 C the GLT24064 will send an ACK on the 9th clock cycle when addressed.
When writing to the display module, the display will respond with a ACK when the write has successfully
been completed. However if the buffer has been filled, or the module is too busy processing data it will
respond with a NAK. When performing a multiple byte read within one I2 C transaction, each byte read from
the slave should be followed by an ACK to indicate that the master still needs data, and a NAK to indicate
that the transmission is over.
The GLT24064 has some speed limitations, especially when run in I2 C mode. Here are some considerations when writing I2 C code:
* to be able to read the replies of query commands (eg. cmds 54, 55) the following command must be
sent (only needs to be sent once, so this can be done somewhere in init): 254 / 160 / 0 this command puts
the reply data in the I2 C output buffer instead of the RS232 output buffer. Please note that due to a 16 byte
output buffer, query commands that reply with more than 16 bytes cannot be read (eg cmd Get FileSystem
Directory)
* 3ms delay between the read commands
* 625us delay in between data bytes within a transaction is necessary
* 375us between transactions is necessary
NOTE These delays are consrevative, and may be decreased based on performance
4.1.2 I2 C Transaction Example
The typical I2 C transaction contains four parts: the start sequence, addressing, information, and stop
sequence. To begin a transaction the data line, SDA, must toggle from high to low while the clock line, SCL,
is high. Next, the display must be addressed using a one byte hexadecimal value, the default to write to the
unit is 0x50, while read is 0x51. Then information can be sent to the unit; even when reading, a command
must first be sent to let the unit know what type of information it is required to return. After each bit is sent,
the display will issue an ACK or NACK as described above. Finally, when communication is complete, the
transaction is ended by toggling the data line from low to high while the clock line is high. An example of
the use of this algorithm to write a simple “HELLO” message can be seen in 2.
Matrix Orbital
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Table 2: I2 C Transaction Algorithm
START
Toggle SDA high to low
Address
0x50
Information 0x48 0x45 0x4C 0x4C 0x4F
STOP
Toggle SDA low to high
4.1.3 Serial Communication
In addition to being able to communicate via I2 C the GLT24064 communicates natively through the
RS-232 protocol at at a default baud rate of 19,200 bps and is capable of standard baud rates from 9600
to 115,200 bps. Furthermore the GLT24064 is also capable of reproducing any non-standard baud rate in
between using values entered into our baud rate generation algorithm and set through command 164 (0xA4).
The display module communicates at standard voltage levels of -30V to +30V or at TTL levels of 0 to +5V
by setting the Protocol Select Jumpers to TTL.
4.1.4 USB Communication
The GLT24064 is a USB device that offers identical communication protocol as the serial comport.
capable of communicating via a USB interface. The USB communications are identical to the serial communications. Communication is via a virtual com port, which is created in the operating system by the
drivers necessary to install the USB display. The GLT24064 communicating via USB is capable of baud
rates of 19,200 bps to 115,200 bps. Other baud rates are subject to the limitation of the virtual com port
driver. For further information regarding supported operating systems, and driver limitations please contact
technical support.
4.2
Turn Flow Control On
Syntax
Parameters
Hexadecimal
Decimal
ASCII
Parameter
full
empty
Matrix Orbital
0xFE 0x3A [full] [empty]
254 58 [full] [empty]
254 “:” [full] [empty]
Length
Description
1
Bytes remaining before issuing a
almost full message. (Full is 0)
1
Bytes available before issuing a
almost empty message. (Empty is
128)
GLT240128
18
Description
This command enables flow control. When the buffer fills so that only
[full] bytes are available, the display will return an “almost full”
message (0xFE) to the host controller. When the buffer empties so that
only [empty] bytes remain, the display will return an “almost empty”
message (0xFF) to the host controller.
The display will return the “almost full” message for every byte sent to
the display until the used buffer space once more drops below the [full]
level. Whether the user is in ‘flow control mode’ or not, the module will
ignore display or command bytes which would overrun the buffer.
While in ‘flow control mode’ the unit will return 0xFE when buffer is
almost full even though it may have already thrown rejected data away.
The buffer size for the display is 128 bytes.
When using this command in an application, selection of the value for
the buffer [full] should be considered very carefully. This is a critical
aspect to be able to use this feature to it’s full potential. When using a
host system or PC which contains a FIFO, the user should set the value
of [full] equal to or greater than the size of the FIFO. The reason for this
is that the FIFO may be full when the host system receives 0xFE. In the
case of 16550 UART the size at its maximum is 16, therefore the value
of [full] should be set to 16 or greater. It is suggested that the “almost
full” parameter be equal to the largest chunk of data the host will be
sending the display (should be less than 127).
NOTE This command is not available in I2 C mode.
Remembered
Default
4.3
Yes
Off
Turn Flow Control Off
Syntax
Description
Hexadecimal 0xFE 0x3B
Decimal
254 59
ASCII
254 “;”
This command turns off flow control. Bytes may overflow the buffer
without warning.
NOTE This command is not available in I2 C mode.
Remembered
4.4
Yes
Changing the I2 C Slave Address
Matrix Orbital
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Syntax
Parameters
Description
Hexadecimal
Decimal
ASCII
Parameter
adr
0xFE 0x33 [adr]
254 51 [adr]
254 “3” [adr]
Length
Description
1
The new I2 C write address (0x00 0xFF).
This command sets the I2 C write address of the module between 0x00
and 0xFF. The I2 C write address must be an even number and the read
address is automatically set to one higher. For example if the I2 C write
address is set to 0x50, then the read address is 0x51.
NOTE The change in address is immediate.
Remembered
Default
4.5
Always
0x50
Changing the Baud Rate
Syntax
Parameters
Description
Remembered
Default
Matrix Orbital
Hexadecimal
Decimal
ASCII
Parameter
speed
0xFE 0x39 [speed]
254 57 [speed]
254 “9” [speed]
Length
Description
1
Hex value corresponding to a baud
rate.
This command sets the RS-232 port to the specified [speed]. The change
takes place immediately. [speed] is a single byte specifying the desired
port speed. Valid speeds are shown in the table below. The display
module can be manually reset to 19,200 baud in the event of an error
during transmission, including transmitting a value not listed below, by
setting the manual override jumper during power up. However, it should
be noted that this command will be ignored until the manual override
jumper is removed again.
Hex Value
0xCF
0x8A
0x67
0x44
0x33
0x22
0x19
0x10
Always
19,200 bps
Baud Rate
9600
14400
19200
28800
38400
57600
76800
115200
GLT240128
20
4.6
Setting a Non-Standard Baud Rate
Syntax
Parameters
Description
Remembered
Examples
Hexadecimal
Decimal
Parameter
speed
0xFE 0xA4 [speed]
254 164 [speed]
Length
Description
2
Inputed LSB MSB from baud rate
formula (12-2047).
This command sets the RS-232 port to a non-standard baud rate. The
command accepts a two byte parameter that goes directly into the
CrystalSpeed
modules baud generator. Use the formula, speed = 8×DesiredBaud
− 1 to
calculate the [speed] for any baud rate setting. The speed can be
anywhere from 12 to 2047 which corresponds to a baud range of 977 to
153,800 baud. Setting the baud rate out of this range could cause the
display to stop working properly and require the Manual Override
jumper to be set.
Always
Crystal Speed 16 Mhz
Desired BAUD 13,500
speed =
crystalspeed
−1
8 ∗ DesiredBaud
speed = 148.15 − 1
speed =
16, 000, 000
−1
8 ∗ 13, 500
speed = 147.15
• LSB = 0x93 (rounded)
• MSB = 0x00
• Intended Baud Rate: 13,500 baud
Actual Baud Rate:
16,000,000
=13,514
Percent
Difference:
0.1%
8(147+1)
NOTES
• Results from the formula are rounded down to the nearest whole number (i.e 73.07
= 73).
• This formula becomes less acurate as baud rates increase, due to rounding.
• Place the speed result backwards into the formula to receive the actual baud rate.
(Baud = CrystalSpeed
8(speed+1) )
• The actual baud rate must be within 3% of the intended baud rate for the device to
communicate.
Matrix Orbital
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5
Fonts
5.1
Introduction
The GLT24064 comes loaded with the ’Small Filled’ and ’Futura Bk BT 16’ fonts by default. However,
it is capable of displaying any font that is uploaded to it in the correct format. MOGD# provides a simple
method of generating font files from your installed fonts. For instructions on how to install MOGD# see
Section 1.5.1 on page 5.
5.1.1 Font File Format
A font file consists of three parts, a header, a character table and bitmap data.
1. Header (4 bytes)
(a)
(b)
(c)
(d)
Nominal Width (1 byte)
Height (1 byte)
ASCII Start Value (1 byte)
ASCII End Value (1 byte)
2. Character Table (3 bytes for every character between the ASCII Start and End values inclusive)
(a) High Offset MSB (1 byte)
(b) Low Offset LSB(1 byte)
(c) Character Width (1 byte)
3. Bitmap Data
5.1.2 Creating a Font
The following is an example of how to create a font file for the letters h, i and j.
First you must create the bitmaps containing the character data in bitmap form. Figure 22 below illustrates the bit pattern for the h, i and j bitmap data.
Figure 22: Bitmaps for h, i, and j
Second you may begin to create the font file starting with the header. The header will contain the nominal
width, the height and the ASCII start and end values inclusive that you wish to create characters for.
Matrix Orbital
GLT240128
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Nominal Width
0x05
Table 8: Font File Header
Height ASCII Start Val
0x07
0x68
ASCII End Val
0x6A
Next we will have to find out how many bytes each character will use up, in order to create the character
table. The bitmaps are encoded horizontally and may have variable widths, h has a width of five, i a width
of three and j a width of four, see the figure below for an example of encoding the first letter h:
1
1
1
1
1
1
1
Bitmap Data
0 0 0
0 0 0
0 1 1
1 0 0
0 0 0
0 0 0
0 0 0
0
0
0
1
1
1
1
Byte
Hex Value
10000100
00101101
10011000
11000110
00100000
0x84
0x2D
0x98
0xC6
0x20
Figure 23: Bitmap Encoding
As you can see the letter h will take up five bytes with the last five bits being zero padded to form a full
byte. So if you continue the process you will get the character data as seen in table 5.1.2.
Character Data
h
i
j
0x84
0x43
0x2D
Character Data
0x2D 0x98 0xC6
0x24 0x84
0x98 0x19 0x60
0x20
Byte Size (For Reference)
0x05
0x03
0x04
The second part of the font file is the character table. The character table is comprised of three bytes for
every glyph in the font file.
The first two bytes represents the position, in bytes, of the glyph stored MSB LSB referenced from the
beginning of the file (including the header. The third byte is the width of the glyph in pixels. So because
there will be 0x09 bytes in the character table (three bytes for each glyph) and four bytes in the header
section, the first entry in the table will be 13, or 0x00 0x0D in hexadecimal, and 0x05 for the width.
To calculate the second entry in the character table, representing the position and width of the second
glyph, take the offset of the first entry and add the size of the first bitmap in bytes. Since the first glyph
occupies 0x05 bytes as seen in table 5.1.2 above, and the offset is 0x00 0x0D, the offset of the second entry
will be 0x00 0x12 and the width of the glyph is 0x03.
Calculate the third entry the same way as the second to get table 9 below.
h
i
j
Matrix Orbital
Table 9: Character Table
High Offset (MSB) Low Offset (LSB)
0x00
0x0D
0x00
0x12
0x00
0x15
GLT240128
Character Width
0x05
0x03
0x04
23
Once completed, place the character table after the header and the character data aat the end, as seen in
table 10.
0x05
0x12
0xC6
0x60
0x07
0x03
0x20
Table 10: Sample Font File
0x68 0x6A 0x00 0x0D
0x00 0x15 0x04 0x84
0x43 0x24 0x84 0x2D
0x05
0x2D
0x98
0x00
0x98
0x19
Red = Header
Blue = Character Table
Purple = Character Data
5.2
Uploading a Font File
Syntax
Parameters
Description
Hexadecimal
Decimal
ASCII
Parameter
refID
0xFE 0x24 [refID] [size] [data]
254 36 [refID] [size] [data]
254 “$” [refID] [size] [data]
Length
Description
1
A unique font identification
number.
size
2
Font file size (LSB to MSB).
data
x
Font file data.
In order to upload a font to the GLT24064 you must first initiate the
upload font file command (0xFE 0x24), you must then pass it a
reference identification number, which must be unique for every font on
the display module. You may then pass the display module the two byte
file size, which needs to be transfered LSB, then MSB. The last part of
uploading a font is transmitting the font file data.
For detailed instructions on uploading a file to the GLT24064 see
Section 11 on page 43.
NOTE This command is available but not supported in I2 C.
Remembered
5.3
Always
Setting the Current Font
Syntax
Matrix Orbital
Hexadecimal
Decimal
ASCII
0xFE 0x31 [refID]
254 49 [refID]
254 “1” [refID]
GLT240128
24
Parameters
Description
Remembered
5.4
Parameter
refID
Length
1
Description
A unique font identification
number.
In order to set the font on the GLT24064 you must know the font
identification number of the font that you wish to use. The font ID is
established when the font is saved to the display. The default installed
fonts are “Small Filled” and “Futura Bk BT 16” and their font ID’s are
0x01 and 0x02 respectfully, with “Small Filled” being the default
selected font.
Once you are aware of the font ID for the font that you wish you use,
simply send the command bytes (0xFE 0x31) and then send the font ID
corresponding to the font. A directory listing of the contents of the
entire filesystem may be obtained by using the “Get Filesystem
Directory” command, see Section 11.5 on page 48 for more detailed
information.
Yes
Font Metrics
Syntax
Parameters
Description
Remembered
Matrix Orbital
Hexadecimal
Decimal
ASCII
Parameter
lm
tm
csp
0xFE 0x32 [lm] [tm] [csp] [lsp] [srow]
254 50 [lm] [tm] [csp] [lsp] [srow]
254 “2” [lm] [tm] [csp] [lsp] [srow]
Length
Description
1
Left margin: Location in pixels.
1
Top margin: Location in pixels.
1
Character Spacing: Amount of
space in pixels between characters.
lsp
1
Line Spacing: Amount of space
between lines in pixels.
srow
1
Scroll Row: The Y location of the
last row in pixels.
Font metrics define where the characters are positioned on the screen,
by setting where the rows and columns begin based on the
[lm][tm][csp][lsp][srow] parameters. [lm] defines the leftmost position
and [tm] the topmost. [csp] controls the amount of pixels that are placed
in between characters and [lsp] controls the amount of pixels that are
placed in between lines. [srow] is the location of the top of the last row
that will be displayed on the GLT24064. It defines the row that, when
filled, will cause the display to auto scroll if auto scrolling is enabled.
The font metrics will have to be reconfigured after changing to a
different font.
Yes
GLT240128
25
5.5
Set Box Space Mode
Syntax
Parameters
Description
Remembered
Default
6
Hexadecimal 0xFE 0xAC [value]
Decimal
254 172 [value]
Parameter
Length
Description
value
1
Value (0: Off, 1: On)
This command will toggle the box space mode. Box space mode is
when a box, the size of the character to be written, is printed to the
display before a character is written.
Yes
On
Text
6.1
Introduction
The GLT24064 is an intelligent display module, designed to reduce the amount of code necessary to
begin displaying data. This means that it is able to display all ASCII formated characters and strings that are
sent to it, which are defined in the current character set. The display module will begin displaying text at the
top left corner of the display area, known as home, and continue to print to the display as if it was a page on
a typewriter. When the text reaches the bottom right row, it is able to automatically scroll all of the lines up
and continue to display text, with the auto scroll option set to on.
6.1.1 Character Set
The graphic displays such as the GLT24064, do not have built in character sets. Instead fonts are uploaded to the display using the commands detailed in Section 5 on page 22.
6.1.2 Control Characters
In addition to a full text set, the GLT24064 display supports the following ASCII Control characters:
0x0A Line feed / New line - when this value is not defined in the font file. This command will create a new
line on the display. If scrolling is on and the display is at the bottom of the screen, the whole screen is
scrolled up.
6.2
Move Cursor Home
Matrix Orbital
GLT240128
26
Syntax
Description
Remembered
6.3
Description
Hexadecimal 0xFE 0x47 [col] [row]
Decimal
254 71 [col] [row]
ASCII
254 “G” [col] [row]
Parameter
Length
Description
col
1
Column
row
1
Row
This command sets the text insertion point to the [col] and [row]
specified. The insertion point is positioned using the base size of the
current font (this command does not position the insertion point at a
specific pixel). The column used is determined by multiplying the width
of the widest character in the font by the [column]. The row used is
determined by multiplying the height of the font by [row + Metrics: line
spacing].
Remembered
No
Parameters
Setting the Cursor Coordinate
Syntax
Parameters
Description
Remembered
6.5
No
Setting the Cursor Position
Syntax
6.4
Hexadecimal 0xFE 0x48
Decimal
254 72
ASCII
254 “H”
This command moves the text insertion point to the top left of the
display area (Row 1, Column 1).
Hexadecimal 0xFE 0x79 [x] [y]
Decimal
254 121 [x] [y]
ASCII
254 “y” [x] [y]
Parameter
Length
Description
x
1
The horizontal position in pixels.
y
1
The vertical position in pixels.
This command positions the insertion point at a specific pixel (X,Y),
which references the top left corner of the font insertion point.
No
Auto Scroll On
Matrix Orbital
GLT240128
27
Description
Hexadecimal 0xFE 0x51
Decimal
254 81
ASCII
254 “Q”
When auto scrolling is on, it causes the display to shift the entire
display’s contents up to make room for a new line of text when the text
reaches the end of the scroll row defined in the font metrics (the bottom
right character position) see Section 5.4 on page 25.
Remembered
Default
Yes
On
Syntax
6.6
Auto Scroll Off
Syntax
Description
Remembered
7
7.1
Hexadecimal 0xFE 0x52
Decimal
254 82
ASCII
254 “R”
When auto scrolling is disabled, text will wrap to the top left corner of
the display area when the text reaches the end of the scroll row defined
in the font metrics (the bottom right character position) see Section 5.4
on page 25. Existing text in the display area is not erased before new
text is placed. A series of spaces followed by a “Cursor Home”
command may be used to erase the top line of text.
Yes
Bitmaps
Introduction
One of the main features of the GLT24064 is its ability to display bitmap images, that are either loaded
onto its on board memory, or written directly to the screen. This chapter will cover creating a bitmap,
uploading the bitmap, as well as drawing the bitmap from memory and directly.
7.2
Uploading a Bitmap File
Syntax
Matrix Orbital
Hexadecimal
Decimal
ASCII
0xFE 0x5E [refID] [size] [data]
254 94 [refID] [size] [data]
254 “^” [refID] [size] [data]
GLT240128
28
Parameters
Description
Parameter
refID
Length
1
Description
A unique bitmap identification
number.
size
2
Bitmap file size (LSB to MSB).
data
x
Bitmap data.
The GLT24064 is capable of storing 128 font and bitmap files up to 16
Kbytes total. In order to upload a bitmap to the GLT24064 you must
first initiate the upload font file command (0xFE 0x5E), you must then
pass it a reference identification number, which must be unique for
every font on the display module. You may then pass the display
module the two byte file system size, which needs to be transfered LSB,
then MSB. This is almost always the entire 16kB, meaning the values
0x00 0x40 0x00 0x00 must be issued. The last part of uploading a
bitmap is transmitting the bitmap file data.
For detailed instructions on uploading a file to the GLT24064 see
Section 11 on page 43.
NOTE This command is available but not not supported in I2 C.
Remembered
7.3
Always
Drawing a Bitmap from Memory
Description
Hexadecimal 0xFE 0x62 [refID] [X] [Y]
Decimal
254 98 [refID] [X] [Y]
ASCII
254 “b” [refID] [X] [Y]
Parameter
Length
Description
refID
1
The bitmap identification number.
X
1
Left bounds.
Y
1
Top bounds.
This command will draw a bitmap that is located in the on board
memory. The bitmap is referenced by the bitmaps reference
identification number, which is established when the bitmap is uploaded
to the display module. The bitmap will be drawn beginning at the top
left, from the specified X,Y coordinates. A directory listing of the
contents of the entire filesystem may be obtained by using the “Get
Filesystem Directory” command, see Section 11.5 on page 48 for more
detailed information.
Remembered
No
Syntax
Parameters
Matrix Orbital
GLT240128
29
7.4
Drawing a Bitmap Directly
Syntax
Parameters
Description
Hexadecimal 0xFE 0x64 [X] [Y] [W] [H] [D]
Decimal
254 100 [X] [Y] [W] [H] [D]
ASCII
254 “d” [X] [Y] [W] [H] [D]
Parameter
Length
Description
X
1
Left bounds.
Y
1
Top bounds.
W
1
Width
H
1
Height
D
(width*height)/8Data
Drawing a bitmap to the GLT24064, without first uploading the image
to the memory can be a very useful feature for drawing images that are
not used very often. In order to accomplish this, you must supply the
display module with the X,Y coordinates, representing the top left
corner of where you would like to draw the bitmap on the screen, as well
as the width and the height of the bitmap. After you have supplied this
data you may then upload the bitmap data to the GLT24064. The length
of this file is the bitmap width multiplied by height, divided by eight.
The bitmap data is encoded into bytes horizontally and is transfered the
same as if you were uploading a file, see Section 11 on page 43 for
more information about transferring data to the display module.
NOTE Drawing a bitmap directly to the display is supported by flow control.
This command is available but not support in I2 C mode.
Remembered
8
8.1
No
Bar Graphs and Drawing
Introduction
Supplementary to the ability of the GLT24064 to display bitmaps and fonts, the GLT24064 also allows
for a robust 2D drawing environment. With the ability to draw by pixel, line or rectangle, as well as the
ability to continue a line to form a polygon, we are certain that you will spend less time, developing and
creating better looking projects. With the addition of custom bar and strip graphs, you are sure to find the
right tools to make any graphical layout a success.
8.2
Set Drawing Color
Matrix Orbital
GLT240128
30
Syntax
Parameters
Description
Remembered
8.3
0xFE 0x63 [color]
254 99 [color]
254 “c” [color]
Length
Description
1
Drawing color (0: White, 1-255:
Black).
This command sets the drawing color for subsequent graphic commands
that do not have the drawing color passed as a parameter. The parameter
[color] is the value of the color where white is 0 and black is 1-255.
No
Draw Pixel
Syntax
Parameters
Description
Remembered
8.4
Hexadecimal
Decimal
ASCII
Parameter
color
Hexadecimal 0xFE 0x70 [x] [y]
Decimal
254 112 [x] [y]
ASCII
254 “p” [x] [y]
Parameter
Length
Description
x
1
X screen location.
y
1
Y screen location.
This command will draw a pixel at (x,y) using the current drawing
color. The unit processes these requests fast enough to keep up with a
steady stream at 115 Kbps so flow control is not required.
No
Drawing a Line
Syntax
Parameters
Description
Remembered
Matrix Orbital
Hexadecimal 0xFE 0x6C [x1] [y1] [x2] [y2]
Decimal
254 108 [x1] [y1] [x2] [y2]
ASCII
254 “l” [x1] [y1] [x2] [y2]
Parameter
Length
Description
x1
1
Left bounds.
y1
1
Top Bounds.
x2
1
Right Bounds.
y2
1
Bottom Bounds.
This command will draw a line from (x1,y1) to (x2,y2) using the current
drawing color. Lines may be drawn from any part of the display to any
other part. However, it may be important to note that the line may
interpolate differently right to left, or left to right. This means that a line
drawn in white from right to left may not fully erase the same line
drawn in black from left to right.
No
GLT240128
31
8.5
Continue a Line
Syntax
Parameters
Description
Remembered
8.6
No
Draw a Rectangle
Syntax
Parameters
Description
Remembered
8.7
Hexadecimal 0xFE 0x65 [x] [y]
Decimal
254 101 [x] [y]
ASCII
254 “e” [x] [y]
Parameter
Length
Description
x
1
Left bounds.
y
1
Top Bounds.
This command will draw a line with the current drawing color from the
last line end (x2,y2) to (x,y). This command uses the global drawing
color.
Hexadecimal
Decimal
ASCII
Parameter
color
0xFE 0x72 [color] [x1] [y1] [x2] [y2]
254 114 [color] [x1] [y1] [x2] [y2]
254 “r” [color] [x1] [y1] [x2] [y2]
Length
Description
1
Drawing color (0: White, 1-255:
Black).
x1
1
Left bounds.
y1
1
Top Bounds.
x2
1
Right Bounds.
y2
1
Bottom Bounds.
This command draws a rectangular box in the specified color (0: White,
1: Black). The top left corner is specified by (x1,y1) and the bottom
right corner by (x2,y2).
No
Drawing a Solid Rectangle
Syntax
Matrix Orbital
Hexadecimal
Decimal
ASCII
0xFE 0x78 [color] [x1] [y1] [x2] [y2]
254 120 [color] [x1] [y1] [x2] [y2]
254 “x” [color] [x1] [y1] [x2] [y2]
GLT240128
32
Parameters
Description
Remembered
8.8
Parameter
color
Length
1
Description
Drawing color (0: White, 1-255:
Black).
x1
1
Left bounds.
y1
1
Top Bounds.
x2
1
Right Bounds.
y2
1
Bottom Bounds.
This command draws a solid rectangle in the specified color (0: White,
1: Black). The top left corner is specified by (x1,y1) and the bottom
right corner by (x2,y2). Since this command involves considerable
processing overhead, we strongly recommend the use of flow control,
particularly if the command is to be repeated frequently.
No
Initializing a Bar Graph
Syntax
Parameters
Matrix Orbital
Hexadecimal
Decimal
ASCII
Parameter
refID
type
x1
y1
x2
y2
0xFE 0x67 [refID] [type] [x1] [y1] [x2] [y2]
254 103 [refID] [type] [x1] [y1] [x2] [y2]
254 “g” [refID] [type] [x1] [y1] [x2] [y2]
Length
Description
1
Reference number
1
Type of bar graph.
1
Left bounds.
1
Top Bounds.
1
Right Bounds.
1
Bottom Bounds.
GLT240128
33
Description
This command initializes a bar graph referred to by number [reference
number] of type [type] with size from (x1,y1) (top left) to (x2,y2)
(bottom right). A maximum of 16 bar graphs with reference numbers
from 0 to 15 can be initialized as:
[type]
0
1
2
3
Remembered
8.9
Direction
Vertical
Horizontal
Vertical
Horizontal
Bar Start Point
Bottom
Left
Top
Right
The bar graphs may be located anywhere on the display, but if
they overlap, they will not display properly.
It is important that [x1] is less than [x2], and [y1] is less than [y2]. This
command doesn’t actually draw the graph, it must be filled in using the
Fill Bar Graph command. The unit saves time by only drawing that part
of the bar graph which has changed from the last write, so the representation on the screen may not survive a screen clear or other corrupting
action. A write of value zero, followed by new values will restore the
proper look of the bar graph.
No
Drawing a Bar Graph
Syntax
Parameters
Description
Remembered
Hexadecimal
Decimal
ASCII
Parameter
ref
0xFE 0x69 [ref] [value]
254 105 [ref] [value]
254 “i” [ref] [value]
Length
Description
1
Initialized bar graph reference
number.
value
1
The number of pixels to fill.
Once the bar graph has been initialized it can be filled in using this
command. This command sets the bar graph specified by the [ref]
number to fill in [value]. [value] is given in pixels and should not
exceed the available height/width of the graph. (If it does the graph will
simply be written to its maximum size.)
No
8.10 Initializing a Strip Chart
Syntax
Matrix Orbital
Hexadecimal
Decimal
ASCII
0xFE 0x6A [refID] [x1] [y1] [x2] [y2]
254 106 [refID] [x1] [y1] [x2] [y2]
254 “j” [refID] [x1] [y1] [x2] [y2]
GLT240128
34
Parameters
Description
Parameter
Length
Description
refID
1
Reference number
x1
1
Left bounds.
y1
1
Top Bounds.
x2
1
Right Bounds.
y2
1
Bottom Bounds.
A strip chart is an area of the screen reserved for horizontal scrolling.
This is normally used as follows:
• Initialize the strip chart, which reserves the appropriate area of the
screen.
• Draw a line segment at the right or left side of the strip chart.
• Shift the strip chart to the right or left.
• Draw the next line segment.
• Used this way the strip chart can produce a graph which scrolls
smoothly horizontally in either direction. With text the strip chart
can produce a marquis effect.
NOTE If the strip chart is used with text we recommend the use of a 6 or 7 pixel wide
fixed width character set, with each character placed 8 pixels from the start of the previous
one.
Up to 7 strip charts ([ref] = 0 - 6) may be defined. To initialize a strip
chart the user must define an area on the display in which to place the
strip chart.(x1,y1) is the top left corner of the area to be used, where
[x1] is the placement of the column where the strip chart is to begin and
[y1] is the row. The user must then define [x2] as the bottom right
column of the area to be utilized and [y2] as the bottom right row.
NOTE The definition of x must lie on byte boundaries. That is, x must be defined as
0x00, 0x08, 0x10, etc. This restriction does not apply to y values.
Remembered
No
8.11 Shifting a Strip Chart
Syntax
Parameters
Matrix Orbital
Hexadecimal
Decimal
ASCII
Parameter
ref
0xFE 0x6B [ref]
254 107 [ref]
254 “k” [ref]
Length
Description
1
Reference number of a strip chart
that has already been created.
GLT240128
35
Description
This command shifts the strip chart left or right. [ref] determines both
which strip chart is used and which direction it will shift. The direction
is selected by the most significant bit (MSB):
• MSB: 0 shifts left
• MSB: 1 shifts right
For example if [ref] is 1:
• 254 107 1 (hex FE 6B 01) shifts left
• 254 107 129 (hex FE 6B 81) shifts right
This command shifts the contents of the area defined in the Initialize
Strip Chart command 8 pixels at a time.
Remembered
9
9.1
No
Touchpad
Introduction
The Matrix Orbital touch pad interface replaces, and in many ways, supercedes the keypad input interface. It adds the functionality of a dynamically adjustable, software controlled keypad. This feature will add
an updated touch to your application system.
9.1.1 Region Mode
This mode will report touch events when they occur in one of thirty-two specified areas or issue a special
byte when a press occurs outside any defined region. Depending on the region reporting mode selected,
either the down, up, or over characters specified for a region will be transmitted when the area defined is
pressed, released, or dragged over respectively. Return values are specifed when a region is created, in
addition to its position and size. These regions can be deleted either individually or collectively when they
are no longer required.
9.1.2 Co-ordinate Mode
This mode will report all touch events in any position on the screen. Each event will be superceded
by a single byte value representing a press, release, or drag. Press events will be predeced by a 1, release
movements by a 2, and drag moves will return a value 4. Afterwhich, two single byte values representing
the x and y co-ordinates of the touch event will be transmitted. Only drag movements greater than the drag
threshold specified will be sent to the host.
Matrix Orbital
GLT240128
36
9.2
Set Touch Region
Syntax
Parameters
Description
Remembered
9.3
0xFE 0x84 [num] [x] [y] [w] [h] [keyDown] [keyUp]
254 132 [num] [x] [y] [w] [h] [keyDown] [keyUp]
Length
Description
1
Region number, each region must
be identified by a unique number,
single byte (32 region max).
x
1
X co-ordinate of the top left corner
of the region, single byte (0-Xmax).
y
1
Y co-ordinate of the top left corner
of the region, single byte (0-Ymax).
w
1
Width of the region, single byte
(0-Xmax).
h
1
Height of the region, single byte
(0-Ymax).
keyDown
1
Value returned when region is
pressed, single byte (0-255).
keyUp
1
Value returned when region is
released, single byte (0-255).
This command creates a touchpad region that reports the key down or
key up values saved to it when a press or release respectively is detected
within the region defined.
Yes
Delete Touch Region
Syntax
Parameters
Description
Remembered
9.4
Hexadecimal
Decimal
Parameter
num
Hexadecimal
Decimal
Parameter
num
0xFE 0x85 [num]
254 133 [num]
Length
Description
1
Region number to be deleted, single
byte.
This command deletes a previously created touchpad region, unique key
preses will no longer be received from events in the area defined by the
deleted region. All events in undefined regions will return 255.
Yes
Delete All Touch Regions
Matrix Orbital
GLT240128
37
Syntax
Description
Remembered
9.5
Yes
Set Touch Mode
Syntax
Parameters
Description
Remembered
Default
9.6
Hexadecimal 0xFE 0x86
Decimal
254 134
This command deletes all touch regions previously created. It is
recommended that this command is issued before setting regions.
Hexadecimal
Decimal
Parameter
mode
0xFE 0x87 [mode]
254 135 [mode]
Length
Description
1
Touch pad mode. Region mode is 0,
Co-ordinate mode is 1.
This commnad sets the reporting mode for the touch pad. Region mode
returns up and down values on press events within defined regions,
while Co-ordinate mode reports every event on the touch pad with
coordinates.
Yes
Co-ordinate Mode
Set Region Reporting Mode
Syntax
Parameters
Description
Hexadecimal
Decimal
Parameter
mode
0xFE 0x88 [mode]
254 136 [mode]
Length
Description
1
Reporting mode for region press
events.
This command sets the reporting mode for touch events in region mode.
Defined key up and key down values will be sent only when certain
reporting parameters are set.
Bit
0
1
2
3
4-7
Remembered
Matrix Orbital
Reporting Parameter
Press
Release
Drag
Out of Region
Reserved
Key down values are transmitted for press and drag events while
key up values are sent on releases. Any out of region touches will be
reported with 0xFF.
Yes
GLT240128
38
Default
Examples
Report All
0x01
0x03
0x06
0x0F
9.7
Set Dragging Threshold
Description
0xFE 0x89 [threshold]
254 137 [threshold]
Length
Description
1
Touch pad dragging threshold,
single byte value (1 to 255).
This command specifies the distance a press must be dragged moved
before a drag event is reported to the host. The lower the threshold the
more values sent to the host, while the higher the value the less precise
the drag
p reporting may be. Distance is calculated as
d = (x2 − x1)2 + (y2 − y1 )2 . Care should be taken to find the
appropriate balance between data points and accuracy.
Remembered
Default
Yes
8
Syntax
Parameters
9.8
Hexadecimal
Decimal
Parameter
threshold
Set Pressure Threshold
Syntax
Parameters
Description
Remembered
Default
9.9
Key down values are sent on touch presses only
Key down and key up values are sent on presses and releases respectively
Key down values are reported on press and drag events
Key down values are sent on presses and drags, key up values on releases, and 0xFF on out o
Hexadecimal
Decimal
Parameter
threshold
0xFE 0x8A [threshold]
254 138 [threshold]
Length
Description
2
Touch pad pressure threshold, two
byte value (1 to 65535).
This command sets the presure required to be placed upon the screen
before a press event is recorded.
Yes
1000
Run Touchpad Calibration
Matrix Orbital
GLT240128
39
Syntax
Description
Remembered
10
Hexadecimal 0xFE 0x8B
Decimal
254 139
This command runs a callibration of the touch pad by specifying a
number of points on the screen and prompting the user to press within
them. It can be used to correct any errors noticed in touch pad events. If
calibration is successful, the display will return two bytes, 0xFE and
0x15, to the host, otherwise it will return 0xFE and 0x14.. It is
recommended that this command be used when environmental or user
factors are changed to allow for correct operation.
Always
Display Functions
10.1 Introduction
The GLT24064 employs software controlled display settings, which allow for control over, clearing the
screen, changing the brightness and contrast or setting timers for turning it on or off. The combination of
these allow you complete software control over your display’s appearance.
10.2 Clear Screen
Syntax
Description
Remembered
Hexadecimal 0xFE 0x58
Decimal
254 88
ASCII
254 “X”
This command clears the display and resets the text insertion position to
the top left position of the screen defined in the font metrics.
No
10.3 Display On
Syntax
Parameters
Matrix Orbital
Hexadecimal
Decimal
ASCII
Parameter
min
0xFE 0x42 [min]
254 66 [min]
254 “B” [min]
Length
Description
1
Minutes before turning the display
on (0 to 90).
GLT240128
40
Description
This command turns the backlight on after the [minutes] timer has
expired, with a ninety minute maximum timer. A time of 0 specifies that
the backlight should turn on immediately and stay on. When this
command is sent while the remember function is on, the timer will reset
and begin after power up.
Remembered
Default
Yes
0
10.4 Display Off
Syntax
Description
Remembered
Hexadecimal 0xFE 0x46
Decimal
254 70
ASCII
254 “F”
This command turns the backlight off immediately. The backlight will
remain off until a ’Display On’ command has been received.
Yes
10.5 Set Brightness
Syntax
Parameters
Description
Remembered
Default
Hexadecimal
Decimal
Parameter
brightness
0xFE 0x99 [brightness]
254 153 [brightness]
Length
Description
1
Display brightness setting (0 to
255).
This command sets the display [brightness]. If the remember function is
on, this command acts the same as ’Set and Save Brightness’.
Yes
255
10.6 Set and Save Brightness
Description
Hexadecimal 0xFE 0x98 [brightness]
Decimal
254 152 [brightness]
Parameter
Length
Description
brightness
1
Backlight setting (0 to 255).
This command sets and saves the display [brightness] as default.
Remembered
Always
Syntax
Parameters
Matrix Orbital
GLT240128
41
10.7 Set Contrast
Syntax
Parameters
Description
Hexadecimal 0xFE 0x50 [contrast]
Decimal
254 80 [contrast]
ASCII
254 “P” [contrast]
Parameter
Length
Description
contrast
1
Contrast value (0 to 255).
This command sets the display’s contrast to [contrast], where [contrast]
is a value between 0x00 and 0xFF (between 0 to 255). Lower values
cause ‘on’ elements in the display area to appear lighter, while higher
values cause ‘on’ elements to appear darker. Lighting and temperature
conditions will affect the actual value used for optimal viewing.
Individual display modules will also differ slightly from each other in
appearance. In addition, values for optimal viewing while the display
backlight is on may differ from values used when backlight is off.
This command does not save the [contrast] value, and is lost after power
down; but this command has the option of remembering the settings
when issued with the Remember function ‘on’ . When this is the case,
this command is the same as the Set and Save Contrast command.
NOTE This command has only 32 levels for X-Board based displays, meaning eight
contrast settings will have the same single effect. Efectively, values 0 through 7, 8 through
15, and so on will result in the same setting.
Remembered
Default
Yes
128
10.8 Set and Save Contrast
Syntax
Parameters
Matrix Orbital
Hexadecimal
Decimal
Parameter
contrast
0xFE 0x91 [contrast]
254 145 [contrast]
Length
Description
1
Contrast value (0 to 255).
GLT240128
42
Description
This command sets the display’s contrast to [contrast], where [contrast]
is a value between 0x00 and 0xFF (between 0 to 255). Lower values
cause ‘on’ elements in the display area to appear lighter, while higher
values cause ‘on’ elements to appear darker. Lighting conditions will
affect the actual value used for optimal viewing. Individual display
modules will also differ slightly from each other in appearance. In
addition, values for optimal viewing while the display backlight is on
may differ from values used when backlight is off.
NOTE This command saves the [contrast] value so that it is not lost after power down.
Remembered
Default
11
Yes
128
Filesystem
11.1 Introduction
The GLT24064 incorporates a 16 Kbyte on board flash memory in order to allow up to 128 font and
bitmap files to be transfered directly onto the display and recalled whenever necessary. The filesystem
can address font and bitmap files combined up to 16 Kbytes. It is recommended that fonts and bitmaps
are uploaded when possible all together after a filesystem wipe ro preserve memory integrity. These fonts
and bitmaps can then be locked to ensure they remain intact. This section covers uploading, downloading,
deleting and moving files, as well as getting the remaining space or wiping the filesystem.
11.1.1
File Upload Protocol
In order to allow fonts and bitmaps to be uploaded to the on board flash memory Matrix Orbital has
developed a simple protocol that supports RS-232/TTL or I2 C communications. In order to begin a file
transmission the first step will be to provide the display module with the appropriate command bytes, meaning the command prefix, 0xFE, followed by the command number, 0x24 for a font file, or 0x5E for a bitmap
file. This will begin the file transfer sequence. The next step will be to request a reference identification
number (ref ID) which will allow you to identify the file for future use. Reference ID numbers can be any
byte between 0x00 and 0x7F, however each ID must be unique.
The next part of uploading a font file is to provide the display module with the two byte file size of the
data that you wish to transfer, LSB to MSB. The LSB must be transmitted first followed by the MSB. After
receiving the MSB the display module will send a confirm byte, 0x01, if the file fits and continue, or decline
byte, 0x08, and terminate the session.
Byte
0x01
0x08
Matrix Orbital
Description
Confirm: Will continue the file transfer.
Decline: Terminate the session.
GLT240128
43
Host
0xFE
0x24
0x01
0x19
0x00
Display
0x01
0x01
0x05
0x05
0x01
0x07
0x07
0x01
0x49
0x49
0x01
...
0x60
...
0x60
0x01
Comments
Command Prefix
Upload Font File Command
Reference ID
Size (LSB)
Size (MSB)
Confirmation Byte
Confimation Byte
Font Width
Echo Font Width
Confimation Byte
Font Height
Echo Font Height
Confimation Byte
Font ASCII Start Value
Echo Font ASCII Start Value
Confimation Byte
...
Last Font File Byte
Echo Last Font File Byte
Confirm Upload Finished
Table 48: Upload Protocol
The last part of uploading a font file is to upload the file data. After transmitting each byte of the file the
module will echo the byte and wait for a confirmation byte of 0x01 until the file has completed uploading.
Below is an example of uploading the font file which we created in Section 5.1.2 on page 22.
At times that the display or the host sees anything else other than 0x01 for confirmation (usually a 0x08)
the upload is aborted.
NOTES
• The GLT24064 has watch dog timer, set to 2.1 seconds in between transmissions, in
order prevent the display module from staying in a waiting state.
• Once the timeout has been reached the timer will reset the display and issue a 0xFE
0xD4 response to the host to signal that this has happened.
Matrix Orbital
GLT240128
44
11.1.2
XModem Upload Protocol
In addition to its original simple upload format, Matrix Orbital has added an XModem based protocol.
This facilitates much faster download speeds by increasing the packet size from 1 byte to 128 bytes greatly
increasing throughput. A two byte CRC check is preformed at the end of each packet in place of the byte
echo system seen in the original protocol. However, the overall protocol remains much the same as the
original, but much faster.
To begin the upload, a series of command bytes are sent, much like the original protocol. However, no
distinction is made between bitmap and font as the XModem protocol is used to upload bin or ebin files that
contain all the bitmaps and fonts required for the unit. Once the command bytes are sent, the size of the file
is sent in two bytes, least signifcant byte first. Then two additional bytes are sent of the value zero.
At this point the display will respond with an ACK if the file fits, or a NAK otherwise. Please note that
these values are different than those of the orignal protocol as seen in the table below. If a NAK is seen at
any point by the host, the upload is to be aborted in the same fashion as the regular protocol.
If the file will fit, the start of header byte will be sent by the host, follwed by a block count representing
the number of 128 byte blocks remaing to upload in regular and inverted forms. The display will then check
to make sure the block count value matches its own before ACKing. The host can then send a 128 byte
block of data followed by that blocks high and low CRC16 bytes. The display then preforms a CRC check
on the data receive and ACKs if it matches that which was sent. Transfer continues with a block count and
continues in this way until the end of file is reached.
Once the end of the upload file is reached, the host should transmit a single end of transmission byte. If
the end of file is expected, the display will ACK one last time. This EOT byte along with the other special
characters mentioned above is listed in the table below.
Character
ACK
NAK
SOH
EOT
Byte
0x06
0x21
0x01
0x04
Description
Acknowledged; successful data transmission
Not Acknowledged; transmission unsuccessful, abort upload
Start of Header; begin upload process
End of Transmission; file upload complete
Below is an example of uploading a bin or ebin file using the XModem protocol.
11.2 Wipe Filesystem
Syntax
Matrix Orbital
Hexadecimal
Decimal
ASCII
0xFE 0x21 0x59 0x21
254 33 89 33
254 “!” “Y” “!”
GLT240128
45
Description
This command completely erases the display’s non-volatile memory. It
removes all fonts, font metrics, bitmaps, and settings (current font,
cursor position, communication speed, etc.). It is an “odd” command in
that it is three bytes in length in order to prevent accidental execution.
NOTE After deleting the file system it is important to cycle power to your display to
ensure the removal process is completed.
Remembered
Yes
11.3 Deleting a File
Syntax
Parameters
Description
Hexadecimal 0xFE 0xAD [type] [refID]
Decimal
254 173 [type] [refID]
Parameter
Length
Description
type
1
Type of file (0:Font, 1:Bitmap)
refID
1
Reference ID of the file to delete.
This command erases a single file at a time within the GLT24064
memory when given two parameters: [type] and [refID]. The file type
and reference number are defined when the file is saved to the
GLT24064.
• [type] = 1: Bitmap
• [type] = 0: Font
NOTE After deleting a file it is important to cycle power to your display to ensure file
system integrity.
Remembered
Yes
11.4 Get Filesystem Space
Syntax
Description
Remembered
Matrix Orbital
Hexadecimal 0xFE 0xAF
Decimal
254 175
This command will return 4 bytes, LSB to MSB for how many bytes are
remaining in the 16 KB on board memory.
No
GLT240128
46
Host
0xFE
0xDB
0x85
0x06
0x30
0x00
0x40
0x00
0x00
Display
0x06
0x01
0x80
0x7F
0x06
0x1E
0x47
0x06
0x7F
0x80
0x06
0x5A
0x0D
...
0x04
0x06
...
0x06
Comments
Command Prefix
XModem Upload Command
Command byte 1
Command byte 2
Command byte 3
Size Low Byte
Size High Byte
0
0
ACK (NAK if file is too big)
Start of Header
Block Count
255 - Block Count
ACK (NAK if counts don’t match)
Data Block
CRC High Byte
CRC Low Byte
ACK (NAK if CRCs don’t match)
Block Count
255 - Block Count
ACK (NAKif counts don’t match)
Data Block
CRC High Byte
CRC Low Byte
ACK (NAKif CRCs don’t match)
...
End of Transmission
ACK (NAK if EOT is not expected)
Table 49: XModem Upload Protocol
Matrix Orbital
GLT240128
47
11.5 Get Filesystem Directory
Syntax
Description
Hexadecimal 0xFE 0xB3
Decimal
254 179
This command will return a directory of the contents of the file system.
The first byte returned will be a hex value representing the number of
entries in the filesystem, followed by four bytes for each entry. See the
following tables:
Bytes
1
Bytes
1
1
1
1
Remembered
Filesystem Header
Description
Hex value representing the number
of entries in the filesystem
File Entry
Description
Flag: Hex value of 0x00 indicates
that this file entry has not been used.
FileID/Type: 1st bit is the file type
(0: Font, 1: Bitmap). Next 7 bits are
the file ID.
File Size: LSB
File Size: MSB
No
11.6 Filesystem Upload
Syntax
Parameters
Description
Remembered
Hexadecimal 0xFE 0xB0 [Size] [Data]
Decimal
254 176 [Size] [Data]
Parameter
Length
Description
Size
4
LSB to MSB filesystem image data
Data
var
Actual data to upload
This command will upload a filesystem image, LSB to MSB to the
display (16KB). The size used is almost always the entire 16kB,
meaning the values 0x00 0x40 0x00 0x00 must be issued. Afterwhich
the filesystem data can be uploaded LSB to MSB in the same manner as
a font or bitmap file.
Always
11.7 Downloading a File
Matrix Orbital
GLT240128
48
Syntax
Parameters
Description
Remembered
Hexadecimal 0xFE 0xB2 [Type] [refID]
Decimal
254 178 [Type] [refID]
Parameter
Length
Description
Type
1
File type (0:Font File, 1:Bitmap)
refID
1
Reference ID number
Download a specified file from the filesystem. The first 4 bytes will be
the length of the file (LSB to MSB) followed by 2 bytes representing the
width and height of the image then the data contained in the file.
No
11.8 Moving a File
Syntax
Parameters
Description
Remembered
12
Hexadecimal 0xFE 0xB4 [oldT] [oldID] [newT] [newID]
Decimal
254 180 [oldT] [oldID] [newT] [newID]
Parameter
Length
Description
oldT
1
Old file type
oldID
1
Old file ID
newT
1
New file type
newID
1
New file ID
This command can be used to move a file to a new file ID, or correct the
type of a file that was uploaded incorrectly. The command first checks
to see if there is a file identified by [oldT] and [oldID]. If it does exist,
and there is no file already with the desired type and ID, the ID and type
of the old file will be changed to [newT] and [newID] respectively.
Always
Data Security
12.1 Introduction
Ensuring that your GLT24064 display’s exactly what you want it to can be the difference between a
projects success and failure. This is why we incorporate features such as Data Lock into the GLT24064
With this new feature you now are in control over of how and when settings will be changed so there is no
need to worry about the module acting exactly like you expected it to because all the settings may be locked
and remembered for the next power up.
Matrix Orbital
GLT240128
49
12.2 Set Remember
Syntax
Parameters
Description
Hexadecimal 0xFE 0x93 [switch]
Decimal
254 147 [switch]
Parameter
Length
Description
switch
1
0: Do not remember, 1: Remember
This command allows you to switch the remember function on and off.
To use the remember function, set remember to on, then set all of the
settings that you wish to save, settings that are listed as ’Remember:
Yes’ support being saved into the non-volatile memory. After you have
set all of the commands that you wish to save, you may then cycle the
power and check the display settings to ensure that all the settings have
been saved. If you wish to use remember again after cycling the power,
you must set it to on again.
NOTES
• Writing to non-volatile memory is time consuming and slows down the operation of
the display.
• Non-volatile memory has a ‘write limit’ and may only be changed approximately
100,000 times.
Remembered
Default
No
Do not remember
12.3 Data Lock
Syntax
Parameters
Matrix Orbital
Hexadecimal
Decimal
Parameter
level
0xFE 0xCA 0xF5 0xA0 [level]
254 202 245 160 [level]
Length
Description
1
Sets the data lock level
GLT240128
50
Description
Paranoia allows you to lock the module from displaying information, as
well as enables the protection of the filesystem and module settings.
Each bit corresponds corresponds to a different lock level, while
sending a zero will unlock your display as the following tables explains:
Bit
0-2
3
Data Lock Level
Reserved
Communication
Speed Lock
4
Setting Lock
5
Filesystem Lock
6
Command Lock
7
Display Lock
Description
Should be left 0
When this bit is set (1) the
Baud Rate and I2 C Slave
address are locked
When this bit is set (1)
the display settings such
as backlight, contrast and
GPO settings are locked.
(Internal EEPROM)
When this bit is set (1)
the external EEPROM is
locked, this has the same
effect as the File System
Jumper
When this bit is set (1) all
commands but commands
202/203 are locked. (cmd
lock)
When this bit is set (1) the
module is locked from displaying any new information. (text lock)
NOTES
• Sending a new data lock level will override the previous data lock level.
• Data lock levels may be combined.
Remembered
Default
Examples
Always
0
Hex
0x00
0x50
Matrix Orbital
Dec
0
80
Binary
0
01010000
GLT240128
Description
Unlock
Setting and Command Lock
51
12.4 Set and Save Data Lock
Syntax
Parameters
Description
Remembered
Default
Hexadecimal 0xFE 0xCB 0xF5 0xA0 [level]
Decimal
254 203 245 160 [level]
Parameter
Length
Description
level
1
Sets the data lock level
This command will set and save the data lock level. See the Data Lock
section for more information.
Always
0
12.5 Dump the Filesystem
Syntax
Description
Remembered
Hexadecimal 0xFE 0x30
Decimal
254 48
ASCII
254 “0”
This will allow you to dump the filesystem for debugging purposes. It
will return a 4 byte value LSB to MSB followed by 16384 bytes making
up the file system.
No
12.6 Write Customer Data
Syntax
Parameters
Description
Remembered
Hexadecimal 0xFE 0x34 [data]
Decimal
254 52 [data]
ASCII
254 “4” [data]
Parameter
Length
Description
data
16
Writes the customer data
Writes the customer Data. 16 Bytes of data can be saved in non-volatile
memory.
No
12.7 Read Customer Data
Syntax
Matrix Orbital
Hexadecimal
Decimal
ASCII
0xFE 0x35
254 53
254 “5”
GLT240128
52
13
Description
Reads whatever was written by Write Customer Data.
Remembered
No
Miscellaneous
13.1 Introduction
This chapter covers the ’Report Version Number’ and ’Read Module Type’ commands. These commands
can be particularly useful to find out more information about the display module before contacting technical
support.
13.2 Read Version Number
Syntax
Description
Hexadecimal 0xFE 0x36
Decimal
254 54
ASCII
254 “6”
This command will return a byte representing the version of the module,
see the following table as an example:
Hex Value
0x19
0x57
Remembered
Version Number
Version 1.9
Version 5.7
No
13.3 Read Module Type
Syntax
Matrix Orbital
Hexadecimal
Decimal
ASCII
0xFE 0x37
254 55
254 “7”
GLT240128
53
Description
Remembered
Matrix Orbital
This command will return a hex value corresponding to the the model
number of the module see the following table:
Hex
1
5
7
9
B
D
F
13
15
21
23
25
27
29
2B
31
33
35
37
39
3B
3D
3F
41
43
45
47
49
4B
4D
4F
51
53
55
57
5B
71
73
77
79
No
Product ID
LCD0821
LCD2041
LCD4041
LK204-25
VFD2021
VFD4021
VK204-25
GLC24064
GLK24064-25
Unused
Unused
GLK24064-16-1U-USB
GLK19264-7T-1U-USB
GLK12232-16-SM
LK204-7T-1U
LK404-AT
LK402-12
LK204-25PC
VK202-24-USB
VK204-24-USB
VK162-12
PK202-25
MOS-AL-202A
MOS-AP-202A
MOS-AL-082
MOS-AV-204
MOS-AV-402
VK402-12
LK402-25
PK204-25
MOS
XBoard-S
MOU
LK202-25-USB
LK204-25-USB
LK162-12-TC
Unused
LK404-25
Unused
GLT480282
GLT240128
Hex
2
6
8
A
C
E
10
14
16
22
24
26
28
2A
2C
32
34
36
38
3A
3C
3E
40
42
44
46
48
4A
4C
4E
50
52
54
56
58
5C
72
74
78
7A
Product ID
LCD2021
LCD4021
LK202-25
LK404-55
VFD2041
VK202-25
GLC12232
Unused
Unused
GLK12232-25
GLK12232-25-SM
GLK24064-16-1U
GLK12232-16
GLK19264-7T-1U
LK204-7T-1U-USB
MOS-AV-162A
LK162-12
LK202-24-USB
LK204-24-USB
PK162-12
MOS-AP-162A
MOS-AL-162A
MOS-AV-202A
PK202-24-USB
MOS-AL-204
MOS-AL-402
LK082-12
VK404-55
VK402-25
Unused
MOI
XBoard-I
XBoard-U
VK202-25-USB
VK204-25-USB
Unused
GLK240128-25
VK404-25
GLT320240
GLT240128
54
14
Command Summary
14.1 Communications
Description
Turn Flow Control On
Turn Flow Control Off
Changing the I2 C Slave
Address
Changing the Baud Rate
Setting a Non-Standard
Baud Rate
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
0xFE 0x3A [full] [empty]
254 58 [full] [empty]
254 “:” [full] [empty]
0xFE 0x3B
254 59
254 “;”
0xFE 0x33 [adr]
254 51 [adr]
254 “3” [adr]
0xFE 0x39 [speed]
254 57 [speed]
254 “9” [speed]
0xFE 0xA4 [speed]
254 164 [speed]
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
0xFE 0x24 [refID] [size] [data]
254 36 [refID] [size] [data]
254 “$” [refID] [size] [data]
0xFE 0x31 [refID]
254 49 [refID]
254 “1” [refID]
0xFE 0x32 [lm] [tm] [csp] [lsp] [srow]
254 50 [lm] [tm] [csp] [lsp] [srow]
254 “2” [lm] [tm] [csp] [lsp] [srow]
0xFE 0xAC [value]
254 172 [value]
Syntax
Hexadecimal
Decimal
ASCII
0xFE 0x48
254 72
254 “H”
Page
18
19
19
20
21
14.2 Fonts
Description
Uploading a Font File
Setting the Current Font
Font Metrics
Set Box Space Mode
Page
24
24
25
26
14.3 Text
Description
Move Cursor Home
Matrix Orbital
GLT240128
Page
26
55
Description
Setting the Cursor
Position
Setting the Cursor
Coordinate
Auto Scroll On
Auto Scroll Off
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
0xFE 0x47 [col] [row]
254 71 [col] [row]
254 “G” [col] [row]
0xFE 0x79 [x] [y]
254 121 [x] [y]
254 “y” [x] [y]
0xFE 0x51
254 81
254 “Q”
0xFE 0x52
254 82
254 “R”
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
0xFE 0x5E [refID] [size] [data]
254 94 [refID] [size] [data]
254 “^” [refID] [size] [data]
0xFE 0x62 [refID] [X] [Y]
254 98 [refID] [X] [Y]
254 “b” [refID] [X] [Y]
0xFE 0x64 [X] [Y] [W] [H] [D]
254 100 [X] [Y] [W] [H] [D]
254 “d” [X] [Y] [W] [H] [D]
Page
27
27
27
28
14.4 Bitmaps
Description
Uploading a Bitmap File
Drawing a Bitmap from
Memory
Drawing a Bitmap
Directly
Page
28
29
30
14.5 Bar Graphs and Drawing
Description
Set Drawing Color
Draw Pixel
Drawing a Line
Continue a Line
Matrix Orbital
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
0xFE 0x63 [color]
254 99 [color]
254 “c” [color]
0xFE 0x70 [x] [y]
254 112 [x] [y]
254 “p” [x] [y]
0xFE 0x6C [x1] [y1] [x2] [y2]
254 108 [x1] [y1] [x2] [y2]
254 “l” [x1] [y1] [x2] [y2]
0xFE 0x65 [x] [y]
254 101 [x] [y]
254 “e” [x] [y]
GLT240128
Page
30
31
31
32
56
Description
Draw a Rectangle
Drawing a Solid
Rectangle
Initializing a Bar Graph
Drawing a Bar Graph
Initializing a Strip Chart
Shifting a Strip Chart
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
0xFE 0x72 [color] [x1] [y1] [x2] [y2]
254 114 [color] [x1] [y1] [x2] [y2]
254 “r” [color] [x1] [y1] [x2] [y2]
0xFE 0x78 [color] [x1] [y1] [x2] [y2]
254 120 [color] [x1] [y1] [x2] [y2]
254 “x” [color] [x1] [y1] [x2] [y2]
0xFE 0x67 [refID] [type] [x1] [y1] [x2] [y2]
254 103 [refID] [type] [x1] [y1] [x2] [y2]
254 “g” [refID] [type] [x1] [y1] [x2] [y2]
0xFE 0x69 [ref] [value]
254 105 [ref] [value]
254 “i” [ref] [value]
0xFE 0x6A [refID] [x1] [y1] [x2] [y2]
254 106 [refID] [x1] [y1] [x2] [y2]
254 “j” [refID] [x1] [y1] [x2] [y2]
0xFE 0x6B [ref]
254 107 [ref]
254 “k” [ref]
Syntax
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Page
0xFE 0x84 [num] [x] [y] [w] [h] [keyDown] [keyUp]
37
254 132 [num] [x] [y] [w] [h] [keyDown] [keyUp]
0xFE 0x85 [num]
37
254 133 [num]
0xFE 0x86
37
254 134
0xFE 0x87 [mode]
38
254 135 [mode]
0xFE 0x88 [mode]
38
254 136 [mode]
0xFE 0x89 [threshold]
39
254 137 [threshold]
0xFE 0x8A [threshold]
39
254 138 [threshold]
0xFE 0x8B
39
254 139
Page
32
32
33
34
34
35
14.6 Touchpad
Description
Set Touch Region
Delete Touch Region
Delete All Touch Regions
Set Touch Mode
Set Region Reporting
Mode
Set Dragging Threshold
Set Pressure Threshold
Run Touchpad
Calibration
14.7 Display Functions
Matrix Orbital
GLT240128
57
Description
Clear Screen
Display On
Display Off
Set Brightness
Set and Save Brightness
Set Contrast
Set and Save Contrast
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
0xFE 0x58
254 88
254 “X”
0xFE 0x42 [min]
254 66 [min]
254 “B” [min]
0xFE 0x46
254 70
254 “F”
0xFE 0x99 [brightness]
254 153 [brightness]
0xFE 0x98 [brightness]
254 152 [brightness]
0xFE 0x50 [contrast]
254 80 [contrast]
254 “P” [contrast]
0xFE 0x91 [contrast]
254 145 [contrast]
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
0xFE 0x21 0x59 0x21
254 33 89 33
254 “!” “Y” “!”
0xFE 0xAD [type] [refID]
254 173 [type] [refID]
0xFE 0xAF
254 175
0xFE 0xB3
254 179
0xFE 0xB0 [Size] [Data]
254 176 [Size] [Data]
0xFE 0xB2 [Type] [refID]
254 178 [Type] [refID]
0xFE 0xB4 [oldT] [oldID] [newT] [newID]
254 180 [oldT] [oldID] [newT] [newID]
Syntax
Hexadecimal
Decimal
0xFE 0x93 [switch]
254 147 [switch]
Page
40
40
41
41
41
42
42
14.8 Filesystem
Description
Wipe Filesystem
Deleting a File
Get Filesystem Space
Get Filesystem Directory
Filesystem Upload
Downloading a File
Moving a File
Page
45
46
46
48
48
48
49
14.9 Data Security
Description
Set Remember
Matrix Orbital
GLT240128
Page
50
58
Description
Data Lock
Set and Save Data Lock
Dump the Filesystem
Write Customer Data
Read Customer Data
Syntax
Hexadecimal
Decimal
Hexadecimal
Decimal
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
0xFE 0xCA 0xF5 0xA0 [level]
254 202 245 160 [level]
0xFE 0xCB 0xF5 0xA0 [level]
254 203 245 160 [level]
0xFE 0x30
254 48
254 “0”
0xFE 0x34 [data]
254 52 [data]
254 “4” [data]
0xFE 0x35
254 53
254 “5”
Syntax
Hexadecimal
Decimal
ASCII
Hexadecimal
Decimal
ASCII
0xFE 0x36
254 54
254 “6”
0xFE 0x37
254 55
254 “7”
Page
50
52
52
52
52
14.10 Miscellaneous
Description
Read Version Number
Read Module Type
Page
53
53
14.11 Command By Number
Command
Hex
0x21
0x24
0x30
0x31
0x32
0x33
0x34
0x35
0x36
0x37
0x39
0x3A
0x3B
0x42
Matrix Orbital
Description Page
Dec
ASCII
33
“!”
36
“$”
48
“0”
49
“1”
50
“2”
51
“3”
52
“4”
53
“5”
54
“6”
55
“7”
57
“9”
58
“:”
59
“;”
66
“B”
Wipe Filesystem
Uploading a Font File
Dump the Filesystem
Setting the Current Font
Font Metrics
Changing the I2 C Slave Address
Write Customer Data
Read Customer Data
Read Version Number
Read Module Type
Changing the Baud Rate
Turn Flow Control On
Turn Flow Control Off
Display On
GLT240128
45
24
52
24
25
19
52
52
53
53
20
18
19
40
59
Command
Hex
0x46
0x47
0x48
0x50
0x51
0x52
0x58
0x5E
0x62
0x63
0x64
0x65
0x67
0x69
0x6A
0x6B
0x6C
0x70
0x72
0x78
0x79
0x84
0x85
0x86
0x87
0x88
0x89
0x8A
0x8B
0x91
0x93
0x98
0x99
0xA4
0xAC
0xAD
0xAF
0xB0
0xB2
0xB3
0xB4
Matrix Orbital
Description Page
Dec
ASCII
70
“F”
71
“G”
72
“H”
80
“P”
81
“Q”
82
“R”
88
“X”
94
“^”
98
“b”
99
“c”
100
“d”
101
“e”
103
“g”
105
“i”
106
“j”
107
“k”
108
“l”
112
“p”
114
“r”
120
“x”
121
“y”
132
133
134
135
136
137
138
139
145
147
152
153
164
172
173
175
176
178
179
180
Display Off
Setting the Cursor Position
Move Cursor Home
Set Contrast
Auto Scroll On
Auto Scroll Off
Clear Screen
Uploading a Bitmap File
Drawing a Bitmap from Memory
Set Drawing Color
Drawing a Bitmap Directly
Continue a Line
Initializing a Bar Graph
Drawing a Bar Graph
Initializing a Strip Chart
Shifting a Strip Chart
Drawing a Line
Draw Pixel
Draw a Rectangle
Drawing a Solid Rectangle
Setting the Cursor Coordinate
Set Touch Region
Delete Touch Region
Delete All Touch Regions
Set Touch Mode
Set Region Reporting Mode
Set Dragging Threshold
Set Pressure Threshold
Run Touchpad Calibration
Set and Save Contrast
Set Remember
Set and Save Brightness
Set Brightness
Setting a Non-Standard Baud Rate
Set Box Space Mode
Deleting a File
Get Filesystem Space
Filesystem Upload
Downloading a File
Get Filesystem Directory
Moving a File
GLT240128
41
27
26
42
27
28
40
28
29
30
30
32
33
34
34
35
31
31
32
32
27
37
37
37
38
38
39
39
39
42
50
41
41
21
26
46
46
48
48
48
49
60
15
Appendix
15.1 Optical Characteristics
Table 76: Optical Characteristics
Pixel Layout (WxH)
240 x 128 pixels
Display Area
107.95 x 57.55mm
Dot Size
0.40 x 0.40mm
Dot Pitch
0.45 x 0.45mm
Viewing Angle (Vertical)
+35o/- 20o from Normal
Viewing Angle (Horizontal)
+30o/- 30o from Normal
LED Backlight Life(GW&WB)
10,000 hours typical
LED Backlight Life(YG)
50,000 hours typical
Backlight
white or yellow-green STN LED
NOTE To prolong life, it is recommended that the backlight be turned off when the
display is not in use.
15.2 Specifications
15.2.1
Environmental
Table 77: Environmental Specifications
Operating Temperature
0◦ C to +50◦ C
Storage Temperature
-20◦ C to +70◦ C
Operating Relative Humidity 60% max non-condensing
Vibration (Operating)
4.9 m/s2 XYZ directions
Vibration (Non-Operating)
19.6 m/s2 XYZ directions
Shock (Operating)
29.4 m/s2 XYZ directions
Shock (Non-Operating)
490 m/s2 XYZ directions
Matrix Orbital
GLT240128
61
Required Operation Force
Tapping Durability
Sliding Durability
15.2.2
Table 79: Touch Specifications
10-100g
1,000,000 at 250g with 2mm diameter stylus
100,000 at 250g with 2mm diameter stylus
Electrical
Supply Voltage
Minimum Current
Backlight ON (GW&WB)
Backlight ON (YG)
Table 78: Electrical Specifications
Standard
Wide Voltage (V) Wide Voltage with ESPS (VPT)
+5Vdc ±0.25V
+9V to +15V
+9V to +35V
80mA typical
add 90mA (170mA) typical
add 260mA (340mA) typical
WARNINGS
• Do not apply any power with reversed polarization.
• Do not apply any voltage other than the specified voltage.
15.2.3
Touch
15.3 Physical Layout
Matrix Orbital
GLT240128
62
Figure 24: Physical Diagram
Matrix Orbital
GLT240128
63
15.4 Ordering Information
G
1
L
2
T
3
240
4
128
5
-USB
6
-VPT
7
-YG
8
Table 80: Part Numbering Scheme
#
1
2
3
4
5
Description
Screen Type
Display Technology
Input Interface
Width
Height
6
Communication Interface
7
Input Voltage
8
Colour (Text/Background)
Options
G: Graphic
L: Liquid Crystal Display
T: Touch Pad
240: pixel width count
128: pixel height count
NP: Standard RS232/TTL/I2C interface
-USB: USB only interface
NP: Standard voltage (4.75-5.25V)
-V: Wide voltage (9.00-15.00V)
-VPT: Wide voltage with ESPS (9.00-35.00V)
-YG: Grey/Yellow Green
-GW: Grey/White
-WB: White/Blue
Table 81: Part Options
15.5 Definitions
V Wide Voltage (+9 to +15Vdc)
VPT Wide Voltage with Efficient Switching Power Supply (+9 to +35Vdc)
GW White Backlight (Grey text on White Background)
WB White Backlight (White text on Blue Background)
YG Yellow Green Backlight with Grey text
MSB Most Significant Byte
LSB Least Significant Byte
15.6 Contacting Matrix Orbital
Telephone
Sales: 1(403)229-2737
Support: 1(403)204-3750
Matrix Orbital
GLT240128
64
On The Web
Sales: http://www.MatrixOrbital.com
Support: http://www.MatrixOrbital.ca
Forums: http://www.lcdforums.com
15.7 Revision History
Table 82: Revision History
Revision Number
Description
1.0
Initial Manual
1.1
Touch Specifications Added
1.2
Updated Backlight Life
Matrix Orbital
GLT240128
Author
Clark
Clark
Clark
65
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