21 lines
591 B
C
21 lines
591 B
C
#include "systick.h"
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volatile uint32_t systick_millis;
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void systick_init(void) {
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SysTick->CTLR = 0x0000;
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SysTick->CMP = SysTick->CNT + SYSTICK_ONE_MILLISECOND;
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systick_millis = 0;
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SysTick->CTLR = SYSTICK_CTLR_STE | // Enable Counter
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SYSTICK_CTLR_STIE | // Enable Interrupts
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SYSTICK_CTLR_STCLK; // Set Clock Source to HCLK/1
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NVIC_EnableIRQ(SysTick_IRQn);
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}
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void SysTick_Handler(void) __attribute__((interrupt));
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void SysTick_Handler(void) {
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SysTick->CMP = SysTick->CNT + SYSTICK_ONE_MILLISECOND;
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SysTick->SR = 0;
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systick_millis++;
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} |