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tmk_keyboard_custom/common/mbed/timer.c
tmk a074364c37 Squashed 'tmk_core/' content from commit 05caacc
git-subtree-dir: tmk_core
git-subtree-split: 05caaccec92694bb24c8c3c3a9940b96efd4605c
2015-04-10 01:32:04 +09:00

42 lines
656 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);
}