菜鸟分享脉冲计数程序

刘俊 · 发表于 2014-6-1 11:20:19

[mw_shl_code=c,true]/*main.c*/ #include"sys.h" #include"delay.h" #include"usart.h" #include"gpio.h" #include"timer.h" #include"count.h" unsigned long int num=0,count=0,i=1; int main() { Stm32_Clock_Init(9); delay_init(72); uart_init(72,9600); TIM2_Init(0xffff); TIM3_Init(71,71); // TIM2->

SC=0; while(1) { if(num==5000) { count=count+TIM2->CNT; printf("%ld\t",count); count=0; num=0; TIM2->CNT=0; } } } void TIM2_IRQHandler() //定时器 { if(TIM3->SR&0x01) { count=count+65536; } TIM2->SR&=~(1<<0); } void TIM3_IRQHandler() //定时器 { if(TIM3->SR&0x01) { num++; } TIM3->SR&=~(1<<0); } /*count.c*/ #include"sys.h" #include"delay.h" #include"usart.h" #include"count.h" void TIM2_Init(u16 arr) { RCC->APB1ENR|=1<<0; RCC->APB2ENR|=1<<2; TIM2->ARR=arr; GPIOA->CRL&=0xfffffff0; GPIOA->CRL|=0x00000008; GPIOA->ODR|=1<<0; //上拉输入 TIM2->CCMR1|=1<<0; //CC1S 输入脚的选择 TIM2->CCMR1&=0xffffff0f; //IC1F清零 TIM2->CCER&=~(1<<1); //选择上升沿极性 TIM2->SMCR|=0x00000007; TIM2->SMCR|=0x00000050; TIM2->CR1|=1<<0; MY_NVIC_Init(1,3,TIM2_IRQn,2); } void TIM3_Init(u16 arr,u16 psc) //作为计时器 { RCC->APB1ENR|=1<<1; TIM3->ARR=arr; //装初值 TIM3->

SC=psc; TIM3->DIER|=1<<0; TIM3->CR1|=0x01; MY_NVIC_Init(1,3,TIM3_IRQn,2); } /*count.h*/ #ifndef COUNT_H #define COUNT_H #include"sys.h" void TIM3_Init(u16 arr,u16 psc); void TIM2_Init(u16 arr); #endif 这个是我经过多次实验通过的计算NE555产生的脉冲的程序，菜鸟和大家分享！希望和我一样的初学者，自己多看看ST公司给的手册，很有用！[/mw_shl_code]