qmk_firmware/tmk_core/common/mbed/timer.c
2019-08-30 15:01:52 -07:00

24 lines
631 B
C

#include "cmsis.h"
#include "timer.h"
/* Mill second tick count */
volatile uint32_t timer_count = 0;
/* Timer interrupt handler */
void SysTick_Handler(void) { timer_count++; }
void timer_init(void) {
timer_count = 0;
SysTick_Config(SystemCoreClock / 1000); /* 1ms tick */
}
void timer_clear(void) { timer_count = 0; }
uint16_t timer_read(void) { return (uint16_t)(timer_count & 0xFFFF); }
uint32_t timer_read32(void) { return timer_count; }
uint16_t timer_elapsed(uint16_t last) { return TIMER_DIFF_16(timer_read(), last); }
uint32_t timer_elapsed32(uint32_t last) { return TIMER_DIFF_32(timer_read32(), last); }