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