STM32测量1Hz限制频率以上的频率计 -

#include "includes.h"
int main()
{
float Tim1_us,Tim2_us;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
delay_init(); //延时函数初始化
USART1_Init(115200,0); //串口初始化为115200
delay_us(500);
TIM3_Cap_Init(0xffff,jishu_pinlv_psc); //计数频率=Tclk/(PSC+1) 以Tclk/(PSC+1)hz的频率计数溢出设置最大
while(1)
{
Tim1_us =CH1_Time/(double)(72/(jishu_pinlv_psc+1));
Tim2_us =CH2_Time/(double)(72/(jishu_pinlv_psc+1));
printf("Channel 1: %fus\r\n",Tim1_us);
printf("Channel 2: %fus\r\n",Tim2_us);
delay_ms(100);
}
}

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