STM32F1, STMCubeMx, Timer Interrupt

STM32F1, STMCubeMx, Timer Interrupt

0. 참고 사이트

• http://embejied.tistory.com/86
• http://trionking.blogspot.com/2016/11/stm32f4xx-timer-clock-source.html

1. Timer Enable

• Clock Source : Internal Clock

2. RCC > HSE > Crystal/Ceramic Resonator

3. LED Pin

4. Clock Configuration > 72MHz

5. Configuration > TIM

6. Parameter Settings

• Prescaler : 36000-1
• Counter Period : 800
• 400ms 마다 timer interrupt가 발생

/*
    400ms

    1) 72MHz System Clock, Prescaler 1MHz Timer Clock
            Prescaler = 72MHz / 36000 - 1 = 2KHz = 0.05ms
    2) 2KHz Timer Clock,
            Period = 800 => 400ms
*/

7. SW 구성

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {         if (htim->Instance == TIM1)         {              HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_7);         } } HAL_TIM_Base_Start_IT(&htim1);

8. 소스

https://github.com/sglee0223/stm32f103ve/tree/master/timer_interrupt

9. 결과

400ms 마다 LED를 점멸하도록 함