UT-M 7-SEG R click
PID: MIKROE-2746
Add a double 7 segment display to your next project.
UT-M 7-SEG R click carries two SMD ultra thin LED 7-SEG displays and the
MAX6969 constant-current LED driver from Maxim Integrated. The click is designed to run on
either 3.3V or 5V power supply. It communicates with the target microcontroller over SPI
interface.
Display features
How the click works
The 7 segment displays are interfaced to the MCU over the MAX6969 16-port, constant-current
LED driver IC.
It uses the common 4-wire serial bus for communication with the MCU itself (LE, SCK, SDO,
SDI on mikroBUS™ pin socket).
There is an additional OE (output enable) pin which is used to control the output driver state
(enabled/disabled). Since it is the PWM output pin on the mikroBUS™ by default, the LED
segments light intensity could be controlled by software too.
MAX6969 driver features
The MAX6969 uses the industry-standard, shift-register-plus-latch-type serial interface.
The driver accepts data shifted into a 16-bit shift register using data input DIN and clock input
CLK. Input data appears at the DOUT output 16 clock cycles later to allow cascading of
multiple MAX6969s. So, the IC allows you to connect multiple click boards™ - for applications
that require more than two seven segment displays, such as digital clocks, temperature sensors,
etc.
Specifications
Type
LED Segment
Applications
Displaying digits and letters on two 7 segment displays
Displays
Ultra thin (3.1mm) LED 7‐SEG displays in RED emitting color
On‐board modules MAX6969 6‐Port, 5.5V Constant‐Current LED Driver
Key Features
Excellent character appearance, low power consumption
Interface
SPI
Input Voltage
3.3V or 5V
Click board size
M (42.9 x 25.4 mm)
Pinout diagram
This table shows how the pinout on UT-M 7-SEG R click corresponds to the pinout on the
mikroBUS™ socket (the latter shown in the two middle columns).
Notes
Pin
Pin
Notes
NC
1 AN
NC
2 RST INT
15 NC
3 CS
TX
14 NC
SCK 4 SCK RX
13 NC
PWM 16 OE PWM control of light intensity
Load‐Enable input LE
Clock input
Serial Data Output SDO 5 MISO SCL 12 NC
Serial Data Input SDI
6 MOSI SDA 11 NC
Power supply
+3.3V 7 3.3V 5V
Ground
GND 8 GND GND 9 GND Ground
10 +5V Power supply
Jumpers and settings
Designator Name
JP1
Default
Position
PRW.SEL. Left
Default
Option
3V3
Description
Power Supply Voltage Selection 3V3/5V, left position
3V3, right position 5V
Programming
Code examples for UT-M 7-SEG R click, written for MikroElektronika hardware and compilers
are available on Libstock.
Code snippet
The following code snippet counts down from 99 to 0 on the displays of the UT-M 7-SEG R
click.
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
sbit
sbit
MAX6969_LE_PIN
at RC2_bit;
MAX6969_LE_PIN_Direction
at
TRISC2_bit;
uint16_t pwmPeriod;
static const uint8_t minus_char = 0x40;
void systemInit()
{
AD1PCFG = 0xFFFF;
MAX6969_LE_PIN_Direction = 0;
SPI3_Init();
pwmPeriod = PWM_Init(5000, 1, 1, 2);
PWM_Start(1);
PWM_Set_Duty(pwmPeriod/10, 1);
}
void MAX6969_Chip_Select()
{
MAX6969_LE_PIN = 1;
asm nop
asm nop
asm nop
MAX6969_LE_PIN = 0;
}
26
27 static void U7SEG_Write(uint8_t number)
28 {
29
char numbers[10] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07,
0x7F, 0x6F};
30
uint8_t tens = number / 10;
31
uint8_t ones = number % 10;
32
if (number > 99) return;
33
34
SPI_Wr_Ptr(numbers[ones]);
35
SPI_Wr_Ptr(numbers[tens]);
36 }
37
38 void main()
39 {
40
uint8_t counter;
41
42
systemInit();
43
counter = 100;
44
45
while(counter--)
46
{
47
U7SEG_Write(counter);
48
MAX6969_Chip_Select();
49
Delay_ms(500);
50
}
51
52
SPI_Wr_Ptr(minus_char);
53
SPI_Wr_Ptr(minus_char);
54
MAX6969_Chip_Select();
55 }
https://shop.mikroe.com/ut‐m‐7‐seg‐r‐click 8‐29‐17
很抱歉,暂时无法提供与“MIKROE-2746”相匹配的价格&库存,您可以联系我们找货
免费人工找货