初始化嵌套向量中断控制器时卡死

zhoutong

如图，在使用串口中断接收数据的时候，程序卡死启动文件，如图所示。单步调试了一下，发现是在初始化嵌套向量中断控制器时卡死了，请问是怎么回事？请各位帮忙看看，谢谢！

[mw_shl_code=c,true]#include "stm32f10x.h" #include "stm32f10x_tim.h" #include "outputpwm.h" #include "stdio.h" #include "stm32f10x_spi.h" #include "misc.h" int fput(int ch,FILE *f) { USART_SendData(USART1,(u8) ch); while(USART_GetFlagStatus(USART1, USART_FLAG_TC)==RESET); return ch; } void USART1_INIT(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); // RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); USART_DeInit(USART1); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; // GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; // GPIO_Init(GPIOA,&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_Tx | USART_Mode_Rx; USART_Init(USART1,&USART_InitStructure); USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); USART_ITConfig(USART1, USART_IT_TXE, ENABLE); USART_Cmd(USART1,ENABLE); } void USART2_INIT(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); // RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); USART_DeInit(USART2); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; // GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; // GPIO_Init(GPIOA,&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_Tx | USART_Mode_Rx; USART_Init(USART2,&USART_InitStructure); USART_ClearFlag(USART2,USART_FLAG_TC); USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); USART_ITConfig(USART2, USART_IT_TXE, ENABLE); USART_Cmd(USART2,ENABLE); } void USART3_INIT(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); // RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); USART_DeInit(USART3); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; // GPIO_Init(GPIOB,&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; // 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_Tx | USART_Mode_Rx; USART_Init(USART3,&USART_InitStructure); USART_ClearFlag(USART3,USART_FLAG_TC); USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); USART_ITConfig(USART3, USART_IT_TXE, ENABLE); USART_Cmd(USART3,ENABLE); } void NVIC_Config(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); // NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; // NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; // NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; // NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } int main() { USART1_INIT(); USART2_INIT(); USART3_INIT(); NVIC_Config(); } void USART2_IRQHandler(void) { u8 rxdata[32],i=0; if(USART_GetITStatus(USART2, USART_IT_RXNE)!= RESET) { USART_ClearITPendingBit(USART2, USART_IT_RXNE); rxdata=USART_ReceiveData(USART2); USART_SendData(USART1,rxdata); i++; } } [/mw_shl_code]

正点原子

估计是没有中断服务函数。

zhoutong

后面发现原来程序是不断的进入USART2的发送中断，一直在那循环。后面我把usart2的发送中断屏蔽了，程序就可以正常运行了。但是通过USART2中断接收到的数据却有些丢失。

[mw_shl_code=c,true]int main() { u8 txdata[32]={0x2f,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08, 0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11, 0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A, 0x1B,0x1C,0x1D,0x1E,0x2F}; u16 i=0; //data; u16 num=10; USART1_INIT(); USART2_INIT(); USART3_INIT(); NVIC_Config(); while(i<32) { USART_SendData(USART3,txdata); while(USART_GetFlagStatus(USART3, USART_FLAG_TXE)== RESET); i++; // while(num--); } } void USART2_IRQHandler(void) { u8 rxdata; if(USART_GetITStatus(USART2, USART_IT_RXNE)==SET) { USART_ClearITPendingBit(USART2, USART_IT_RXNE); rxdata=USART_ReceiveData(USART2); USART_SendData(USART1,rxdata); } }[/mw_shl_code]

用ministm32 V3.2板子做的测试，串口调试结果如下图：

但是如果在main函数中的串口发送循环里加个小延时，结果又是正常的，全部数据都能接收到。请问这是又什么原因呢？
我是最近才接触stm32的，还请原子哥多多指教。谢谢！

正点原子

回复【3楼】zhoutong:
---------------------------------
你不要让main函数的while跳出来！！
main函数不能执行完！！