标题: stm32f1 PWM输入捕获程序 [打印本页]
作者: zlkj    时间: 2024-10-8 16:11
标题: stm32f1 PWM输入捕获程序
  1. #include "stm32f10x.h"   
  2. #include "pwm.h"
  3. #include "usart.h"

  5. __IO uint16_t IC1Value = 0;
  6. __IO uint16_t DutyCycle = 0;
  7. __IO uint32_t Frequency = 0;

  9. void Delay(u32 nCount)
  10. {
  11.         for(; nCount!=0; nCount--);
  12. }

  14. int main(void)
  15. {
  16.         USART1_Config();
  17.         TIM3_PWMIC_Config();
  18.        
  19.         while(1)
  20.         {
  21.                 Delay(0xffffff);
  22.                 printf("DutyCycle: %d%%\r\n", DutyCycle);
  23.                 printf("Frequency: %d\r\n", Frequency);
  24.         }
  25. }

  27. void TIM3_IRQHandler(void)
  28. {
  29.   /* Clear TIM3 Capture compare interrupt pending bit */
  30.   TIM_ClearITPendingBit(TIM3, TIM_IT_CC1);

  32.   /* Get the Input Capture value */
  33.   IC1Value = TIM_GetCapture1(TIM3);  

  35.   if (IC1Value != 0)
  36.   {
  37.     /* Duty cycle computation */
  38.     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

  40.     /* Frequency computation */
  41.     Frequency = SystemCoreClock / IC1Value;
  42.   }
  43.   else
  44.   {
  45.     DutyCycle = 0;
  46.     Frequency = 0;
  47.   }
  48. }
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代码: stm32f1 PWM输入捕获.7z (177.87 KB, 下载次数: 1)




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