mirror of
https://github.com/markqvist/MicroAPRS
synced 2026-08-12 17:40:33 -04:00
49 lines
964 B
C
Executable file
49 lines
964 B
C
Executable file
// Copyright Mark Qvist / unsigned.io
|
|
// https://unsigned.io/microaprs
|
|
//
|
|
// Licensed under GPL-3.0. For full info,
|
|
// read the LICENSE file.
|
|
|
|
#ifndef UTIL_TIME_H
|
|
#define UTIL_TIME_H
|
|
|
|
#include <util/atomic.h>
|
|
#include "device.h"
|
|
|
|
#define DIV_ROUND(dividend, divisor) (((dividend) + (divisor) / 2) / (divisor))
|
|
#define CLOCK_TICKS_PER_SEC CONFIG_AFSK_DAC_SAMPLERATE
|
|
|
|
typedef int32_t ticks_t;
|
|
typedef int32_t mtime_t;
|
|
|
|
volatile ticks_t _clock;
|
|
|
|
static inline ticks_t timer_clock(void) {
|
|
ticks_t result;
|
|
|
|
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
|
|
result = _clock;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
inline ticks_t ms_to_ticks(mtime_t ms) {
|
|
return ms * DIV_ROUND(CLOCK_TICKS_PER_SEC, 1000);
|
|
}
|
|
|
|
inline void cpu_relax(void) {
|
|
// Do nothing!
|
|
}
|
|
|
|
static inline void delay_ms(unsigned long ms) {
|
|
ticks_t start = timer_clock();
|
|
unsigned long n_ticks = ms_to_ticks(ms);
|
|
while (timer_clock() - start < n_ticks) {
|
|
cpu_relax();
|
|
}
|
|
}
|
|
|
|
|
|
#endif
|