34 lines
410 B
C
34 lines
410 B
C
#include <stdint.h>
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#include <stm32/stm32f4xx.h>
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#include <cmsis/core_cm4.h>
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static void watchdog_ack(void)
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{
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IWDG->KR = 0xAAAA;
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}
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int ram_code_main(void)
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{
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SysTick_Config(168000UL);
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__enable_irq();
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while(1) {
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__WFI();
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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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static uint32_t tick_cnt = 0;
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tick_cnt++;
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watchdog_ack();
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if (tick_cnt >= 250) {
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GPIOB->ODR ^= (1<<2);
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tick_cnt = 0;
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}
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}
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