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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 额求帮助 |
单步仿真一下,看看走到哪儿进入的这个中断。 |