基于STM32F103單片機(jī)定時(shí)器的輸入捕獲程序

ID:1075158 · 發(fā)表于 2023-5-3 21:05

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "key.h"
#include "timer.h"

extern u8  TIM5CH1_CAPTURE_STA;       //輸入捕獲狀態(tài)
extern u32 TIM5CH1_CAPTURE_VAL; //輸入捕獲值

int main(void)
{
long long temp=0;

HAL_Init();                            //初始化HAL庫(kù)
Stm32_Clock_Init(RCC_PLL_MUL9);    //設(shè)置時(shí)鐘,72M
delay_init(72);                      //初始化延時(shí)函數(shù)
uart_init(115200);                   //初始化串口
LED_Init();                         //初始化LED
TIM1_PWM_Init(500-1,72-1);          //72M/72=1M的計(jì)數(shù)頻率，自動(dòng)重裝載為500，那么PWM頻率為1M/500=2kHZ
TIM5_CH1_Cap_Init(0XFFFF,72-1);       //以1Mhz的頻率計(jì)數(shù)

while(1)
{
      delay_ms(10);
      TIM_SetTIM1Compare1(TIM_GetTIM1Capture1()+1);
      if(TIM_GetTIM1Capture1()==300)TIM_SetTIM1Compare1(0);
      if(TIM5CH1_CAPTURE_STA&0X80)       //成功捕獲到了
      {
         temp=TIM5CH1_CAPTURE_STA&0X3F;
         temp*=65536;                   //溢出時(shí)間總和
         temp+=TIM5CH1_CAPTURE_VAL;    //得到總的高電平時(shí)間
         printf("HIGH:%lld us\r\n",temp);//打印總的高點(diǎn)平時(shí)間
         TIM5CH1_CAPTURE_STA=0;       //開啟下一次捕獲
      }
}
}

Keil代碼下載:

Keil代碼.7z (1.29 MB, 下載次數(shù): 33)

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基于STM32F103單片機(jī)定時(shí)器的輸入捕獲程序

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