diff options
Diffstat (limited to 'platforms/avr/_wait.h')
| -rw-r--r-- | platforms/avr/_wait.h | 49 | 
1 files changed, 49 insertions, 0 deletions
| diff --git a/platforms/avr/_wait.h b/platforms/avr/_wait.h new file mode 100644 index 0000000000..683db6ae57 --- /dev/null +++ b/platforms/avr/_wait.h @@ -0,0 +1,49 @@ +/* Copyright 2021 QMK + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program.  If not, see <http://www.gnu.org/licenses/>. + */ +#pragma once + +#include <util/delay.h> + +#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. */ +#ifndef GPIO_INPUT_PIN_DELAY +#    define GPIO_INPUT_PIN_DELAY 2 +#endif + +#define waitInputPinDelay() wait_cpuclock(GPIO_INPUT_PIN_DELAY) | 
