stm32同时配置串口1和定时器2中断为什么只能进去一个啊，同时开启之后只能进入串口中断，定时器中断死活不进去啊。
main函数如下：
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include <stdio.h>
#include"stm32f10x_tim.h"
int i;
/* Private function prototypes -----------------------------------------------*/
void GPIO_Configuration(void);
void USART_Configuration(void);
void NVIC_Config(void);
void RCC_Configuration(void);
void TIM_Config( void );
void Delay (uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
int main(void)
{
GPIO_Configuration();
TIM_Config();
USART_Configuration();
NVIC_Config();
RCC_Configuration();
USART_ClearFlag(USART1,USART_FLAG_TC);
i=0;
while (1)
{
if(i)
{
GPIOD->ODR = 0xfffffffe;
}
else
{
GPIOD->ODR=0xffffffff;
}
}
}
void TIM_Config( void )
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);
TIM_DeInit(TIM2);
TIM_TimeBaseStructure.TIM_Period=800; /* 自动重装载寄存器周期的值(计数值)t=800*(1/2000)=400ms 时间到产生一个中断 */
/*使用内部时钟*/
/* 累计 TIM_Period个频率后产生一个更新或者中断 */
TIM_TimeBaseStructure.TIM_Prescaler= (7200 - 1); TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; /* 采样分频 */
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; /* 向上计数模式 */
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ClearFlag(TIM2, TIM_FLAG_Update); /* TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
TIM_Cmd(TIM2, ENABLE); }
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOD , ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : USART_Configuration
* Description : Configure USART1
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void USART_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB | RCC_APB2Periph_USART1 | RCC_APB2Periph_AFIO ,ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_USART1,ENABLE);
/*
* USART1_TX -> PB6 , USART1_RX -> PB7
*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_ClearFlag(USART1,USART_FLAG_TC);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
USART_Cmd(USART1, ENABLE);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures the nested vectored interrupt controller.
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
中断函数如下：
定时器中断：
void TIM2_IRQHandler(void)
{
if ( TIM_GetITStatus(TIM2 , TIM_IT_Update) != RESET )
{
TIM_ClearITPendingBit(TIM2 , TIM_FLAG_Update);
i=0;
}
}
串口中断
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1,USART_IT_RXNE)!=RESET) {
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
i=1;
}
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