Mouse code for the MacroRat
GPIO.h
- Committer:
- kyleliangus
- Date:
- 2017-05-26
- Revision:
- 32:69acb14778ea
- Parent:
- 12:5790e56a056f
File content as of revision 32:69acb14778ea:
#include "stm32f4xx.h" // PA_1 is A of right // PA_0 is B of right // PA_5 is A of left // PB_3 is B of left #define ALT_FUNC_MODE 0x03 //#define // set GPIO pins to alternate for the pins corresponding to A/B for eacah encoder, and 2 alternate function registers need to be selected for each type // of alternate function specified // 4 modes sets AHB1ENR // Now TMR: enable clock with timer, APB1ENR // set period, autoreload value, ARR value 2^32-1, CR1 - TMR resets itself, ARPE and EN // // Encoder mode: disable timer before changing timer to encoder // CCMR1/2 1/2 depends on channel 1/2 or 3/4, depends on upper bits, depending which channels you use // CCMR sets sample rate and set the channel to input // CCER, which edge to trigger on, cannot be 11(not allowed for encoder mode), CCER for both channels // SMCR - encoder mode // CR1 reenabales // then read CNT reg of timer