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qmk_firmware

custom branch of QMK firmware git clone https://anongit.hacktivis.me/git/qmk_firmware.git

ps2_io.c (1161B)

    

  1. #include <stdbool.h>
  2. #include "ps2_io.h"
  3. #include "gpio.h"
  4. #include "wait.h"
  6. /* Check port settings for clock and data line */
  7. #if !(defined(PS2_CLOCK_PIN))
  8. #    error "PS/2 clock setting is required in config.h"
  9. #endif
  11. #if !(defined(PS2_DATA_PIN))
  12. #    error "PS/2 data setting is required in config.h"
  13. #endif
  15. /*
  16.  * Clock
  17.  */
  18. void clock_init(void) {}
  20. void clock_lo(void) {
  21.     // Transition from input with pull-up to output low via Hi-Z instead of output high
  22.     gpio_write_pin_low(PS2_CLOCK_PIN);
  23.     gpio_set_pin_output(PS2_CLOCK_PIN);
  24. }
  26. void clock_hi(void) {
  27.     gpio_set_pin_input_high(PS2_CLOCK_PIN);
  28. }
  30. bool clock_in(void) {
  31.     gpio_set_pin_input_high(PS2_CLOCK_PIN);
  32.     wait_us(1);
  33.     return gpio_read_pin(PS2_CLOCK_PIN);
  34. }
  36. /*
  37.  * Data
  38.  */
  39. void data_init(void) {}
  41. void data_lo(void) {
  42.     // Transition from input with pull-up to output low via Hi-Z instead of output high
  43.     gpio_write_pin_low(PS2_DATA_PIN);
  44.     gpio_set_pin_output(PS2_DATA_PIN);
  45. }
  47. void data_hi(void) {
  48.     gpio_set_pin_input_high(PS2_DATA_PIN);
  49. }
  51. bool data_in(void) {
  52.     gpio_set_pin_input_high(PS2_DATA_PIN);
  53.     wait_us(1);
  54.     return gpio_read_pin(PS2_DATA_PIN);
  55. }