diff options
Diffstat (limited to 'tmk_core/common/avr/_wait.h')
| -rw-r--r-- | tmk_core/common/avr/_wait.h | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/tmk_core/common/avr/_wait.h b/tmk_core/common/avr/_wait.h index 56eb316faf..683db6ae57 100644 --- a/tmk_core/common/avr/_wait.h +++ b/tmk_core/common/avr/_wait.h @@ -17,8 +17,28 @@ #include <util/delay.h> -#define wait_ms(ms) _delay_ms(ms) -#define wait_us(us) _delay_us(us) +#define wait_ms(ms) \ + do { \ + if (__builtin_constant_p(ms)) { \ + _delay_ms(ms); \ + } else { \ + for (uint16_t i = ms; i > 0; i--) { \ + _delay_ms(1); \ + } \ + } \ + } while (0) +#define wait_us(us) \ + do { \ + if (__builtin_constant_p(us)) { \ + _delay_us(us); \ + } else { \ + for (uint16_t i = us; i > 0; i--) { \ + _delay_us(1); \ + } \ + } \ + } while (0) +#define wait_cpuclock(n) __builtin_avr_delay_cycles(n) +#define CPU_CLOCK F_CPU /* The AVR series GPIOs have a one clock read delay for changes in the digital input signal. * But here's more margin to make it two clocks. */ @@ -26,4 +46,4 @@ # define GPIO_INPUT_PIN_DELAY 2 #endif -#define waitInputPinDelay() __builtin_avr_delay_cycles(GPIO_INPUT_PIN_DELAY) +#define waitInputPinDelay() wait_cpuclock(GPIO_INPUT_PIN_DELAY) |