stm32f1 PWM输入捕获程序

ID:82098 · 发表于 2024-10-8 16:11

#include "stm32f10x.h"
#include "pwm.h"
#include "usart.h"
__IO uint16_t IC1Value = 0;
__IO uint16_t DutyCycle = 0;
__IO uint32_t Frequency = 0;
void Delay(u32 nCount)
{
for(; nCount!=0; nCount--);
}
int main(void)
{
USART1_Config();
TIM3_PWMIC_Config();
while(1)
{
Delay(0xffffff);
printf("DutyCycle: %d%%\r\n", DutyCycle);
printf("Frequency: %d\r\n", Frequency);
}
}
void TIM3_IRQHandler(void)
{
/* Clear TIM3 Capture compare interrupt pending bit */
TIM_ClearITPendingBit(TIM3, TIM_IT_CC1);
/* Get the Input Capture value */
IC1Value = TIM_GetCapture1(TIM3);
if (IC1Value != 0)
{
/* Duty cycle computation */
DutyCycle = (TIM_GetCapture2(TIM3) * 100) / IC1Value;//TIM_GetCapture2触发信号和下一个相反极性的边信号的计数个数
/* Frequency computation */
Frequency = SystemCoreClock / IC1Value;
}
else
{
DutyCycle = 0;
Frequency = 0;
}
}

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stm32f1 PWM输入捕获.7z (177.87 KB, 下载次数: 1)

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