mirror of
https://github.com/firewalkwithm3/qmk_firmware.git
synced 2024-11-22 11:30:30 +08:00
122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
#pragma once
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#include <inttypes.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(__ARMEL__) || defined(__ARMEB__)
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# ifndef __OPTIMIZE__
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# pragma message "Compiler optimizations disabled; wait_cpuclock() won't work as designed"
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# endif
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# define wait_cpuclock(x) wait_cpuclock_allnop(x)
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# define CLOCK_DELAY_NOP8 "nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t"
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__attribute__((always_inline)) static inline void wait_cpuclock_allnop(unsigned int n) { /* n: 1..135 */
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/* The argument n must be a constant expression.
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* That way, compiler optimization will remove unnecessary code. */
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if (n < 1) {
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return;
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}
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if (n > 8) {
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unsigned int n8 = n / 8;
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n = n - n8 * 8;
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switch (n8) {
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case 16:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 15:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 14:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 13:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 12:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 11:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 10:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 9:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 8:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 7:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 6:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 5:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 4:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 3:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 2:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 1:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 0:
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break;
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}
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}
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switch (n) {
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case 8:
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asm volatile("nop" ::: "memory");
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case 7:
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asm volatile("nop" ::: "memory");
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case 6:
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asm volatile("nop" ::: "memory");
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case 5:
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asm volatile("nop" ::: "memory");
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case 4:
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asm volatile("nop" ::: "memory");
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case 3:
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asm volatile("nop" ::: "memory");
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case 2:
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asm volatile("nop" ::: "memory");
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case 1:
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asm volatile("nop" ::: "memory");
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case 0:
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break;
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}
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}
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#endif
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#if defined(__AVR__)
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# include <util/delay.h>
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# define wait_ms(ms) _delay_ms(ms)
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# define wait_us(us) _delay_us(us)
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# define wait_cpuclock(x) __builtin_avr_delay_cycles(x)
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#elif defined PROTOCOL_CHIBIOS
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# include <ch.h>
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# define wait_ms(ms) \
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do { \
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if (ms != 0) { \
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chThdSleepMilliseconds(ms); \
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} else { \
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chThdSleepMicroseconds(1); \
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} \
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} while (0)
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# define wait_us(us) \
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do { \
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if (us != 0) { \
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chThdSleepMicroseconds(us); \
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} else { \
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chThdSleepMicroseconds(1); \
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} \
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} while (0)
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#elif defined PROTOCOL_ARM_ATSAM
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# include "clks.h"
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# define wait_ms(ms) CLK_delay_ms(ms)
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# define wait_us(us) CLK_delay_us(us)
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#else // Unit tests
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void wait_ms(uint32_t ms);
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# define wait_us(us) wait_ms(us / 1000)
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#endif
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#ifdef __cplusplus
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}
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#endif
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