MIKROE-2366

Thumbwheel click From MikroElektonika Documentation Thumbwheel click is a mikroBUS™ add-on board with a 10-position rotary sprocket connected to a 1-Wire 8-Channel Addressable Switch. Thumbwheel click Features and usage notes The starting position of the switch is marked with a small notch on the PCB above the wheel. Printed numerals from 1 to 10 clearly mark each position. The thumbwheel has a crown with small incisions for better finger traction. The board can use both a 3.3V or a 5V power supply. The One-Wire signal can be sent either through the mikroBUS AN or PWM pins. You choose which one by soldering the GP SEL jumper into the right position. Schematic also available in PDF (http://cdndocs.mikroe.com/images/1/1c/Thumbwheel_click_sch Thumwheel click is controlled through a simple Dallas One-Wire protocol with only three functions. There is a function for configuring the registers, a function for reading the current position of the thumbwheel, and a function for software reset. Hardware reset can be executed using the RST pin. MikroElektronika compilers contain a One-Wire library that works with this click. Programming Thumbwheel click IC/Module Thumbwheel, DS2408 8-channel addressable switch (http://datasheets.maximintegrated.com/en/ds/DS2408.pdf) Interface 1-Wire (OW1 or OW2) Power 3.3V, 5V supply Website The following code snippet reads the current position of the thumbwheel www.mikroe.com/click/thumbwheel (http://www.mikroe.com/click/thumbwheel) 1 char DS2408_ChannelRead() 2 { 3 int state; 4 5 while( Ow_Reset( &GPIOA_BASE, 0 ) ); 6 7 Ow_Write( &GPIOA_BASE, 0, DS2408_SKIP_ROM_CMD ); 8 Ow_Write( &GPIOA_BASE, 0, DS2408_CHANNEL_READ_CMD ); 9 state = Ow_Read( &GPIOA_BASE, 0 ); return state; 10 11 } Code examples that demonstrate the usage of Thumbwheel click with MikroElektronika hardware, written for mikroC, mikroBasic and mikroPascal for ARM, AVR, dsPIC, and PIC are available on [Libstock]. Resources - DS2408 8-channel addressable switch (http://datasheets.maximintegrated.com/en/ds/DS2408.pdf) - Code example on Libstock (http://libstock.mikroe.com/projects/view/1869/thumbwheel-click) - MikroBUS™ standard specifications (http://download.mikroe.com/documents/standards/mikrobus/mikrobus-standard-specification-v200.pdf) Retrieved from "http://docs.mikroe.com/index.php?title=Thumbwheel_click&oldid=533" ◾ This page was last modified on 22 July 2016, at 15:12. ◾ Content is available under Creative Commons Attribution unless otherwise noted. http://docs.mikroe.com/index.php?title=Thumbwheel_click&printable=yes 8/8/2016