1.main.c(主函数部分)代码:
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Timer.h"
uint16_t Num;
int main(void)
{
OLED_Init();
OLED_ShowString(1,1,"Num:");
OLED_ShowString(2,1,"CNT:");
Timer_Init();
while(1)
{
OLED_ShowNum(1,5,Num,4);
OLED_ShowNum(2,5,Timer_GetCounter(),4);
}
}
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update)==SET)
{
Num++;
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}
2.定时外部中断(Timer.c)代码部分:
#include "stm32f10x.h" // Device header
void Timer_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IPU;
GPIO_InitStruct.GPIO_Pin=GPIO_Pin_0;
GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStruct);
TIM_ETRClockMode2Config(TIM2,TIM_ExtTRGPSC_OFF,TIM_ExtTRGPolarity_NonInverted,0x00);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
TIM_TimeBaseInitStruct.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Period=10-1;
TIM_TimeBaseInitStruct.TIM_Prescaler=1-1;
TIM_TimeBaseInitStruct.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStruct);
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
NVIC_InitTypeDef NVIC_InitStruct;
NVIC_InitStruct.NVIC_IRQChannel=TIM2_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=2;
NVIC_InitStruct.NVIC_IRQChannelSubPriority=1;
NVIC_Init(&NVIC_InitStruct);
TIM_Cmd(TIM2,ENABLE);
}
uint16_t Timer_GetCounter(void)
{
return TIM_GetCounter(TIM2);
}
3.定时器外部中断(Timer.h)代码部分:
#ifndef __TIMER_H
#define __TIMER_H
void Timer_Init(void);
uint16_t Timer_GetCounter(void);
#endif