48 lines
837 B
C
48 lines
837 B
C
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#include "stm32f4xx_rcc.h"
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#include "led.h"
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volatile uint32_t system_tick_cnt;
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void system_tick_init(void)
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{
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RCC_ClocksTypeDef rcc_clocks;
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system_tick_cnt = 0;
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RCC_GetClocksFreq(&rcc_clocks);
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
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SysTick_Config(rcc_clocks.HCLK_Frequency / 1000);
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}
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void led_loop(void)
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{
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static uint32_t tick = 0;
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if (system_tick_cnt - tick > 500) {
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led_toggle();
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tick = system_tick_cnt;
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}
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}
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void system_init(void)
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{
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led_init();
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system_tick_init();
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}
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int main(void)
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{
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system_init();
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
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SCB->VTOR = 0x08000000;
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__enable_irq();
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while (1) {
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led_loop();
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}
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return 0;
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}
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void SysTick_Handler(void)
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{
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system_tick_cnt++;
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}
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