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