stm32f103定时器

ID:443106 · 发表于 2018-12-10 10:29

#include"stm32f10x.h"
#include"stm32f10x_it.h"
void LED_Config(void);
void TIM3_Config(void);
void TIM3_NVIC_Config(void);
int main()
{
LED_Config();
TIM3_NVIC_Config();
TIM3_Config();
GPIO_ResetBits(GPIOA,GPIO_Pin_8);
while(1)
{
}
return 0;
}
void LED_Config(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStruct);

}
void TIM3_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler=(7200-1);
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period=10000;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);
TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_Trigger,ENABLE);
TIM_Cmd(TIM3,ENABLE);
}

void TIM3_NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update)!=RESET)
{
  TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
  GPIO_WriteBit(GPIOA,GPIO_Pin_8,
                        (BitAction)((1-GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_8))));
}
}

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