串口中断程序进入了总线错误中断？？？

漂泊的雨林 · 发表于 2015-5-12 21:01:00

先上程序
#include "stm32f10x.h"
#include <stdio.h>
#include "touwenjian.h"

extern uint8_t ch;
extern uint8_t flog;
int main(void)
{
USART1_Init();
nvic_Init();
while(flog==1)
{
   USART_SendData(USART1, ch);
   while( USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET );
flog=0;
}
}

下面是中断程序
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1,USART_IT_RXNE)!=RESET)
{
   ch=USART_ReceiveData(USART1);
while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET){}
flog=1;
}
}

配置程序
void nvic_Init(void)
{
   NVIC_InitTypeDef NVIC_InitStructure;
   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

void USART1_Init(void)
{
   GPIO_InitTypeDef GPIO_InitStructure;
   USART_InitTypeDef USART_InitStructure;
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA , &GPIO_InitStructure);

   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_Init(GPIOA , &GPIO_InitStructure);

USART_InitStructure.USART_BaudRate = 115200;
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_ITConfig(USART1,USART_IT_RXNE,ENABLE);
   USART_Cmd(USART1, ENABLE);
}

问题是我硬件仿真的时候他进入了
void BusFault_Handler(void)
{
  /* Go to infinite loop when Bus Fault exception occurs */
  while (1)
  {
  }
}这个总线错误中断