为什么stm32一直卡死在发送中断

ID:328334 · 发表于 2020-3-30 23:33

问题： 发送完信息后，卡死在发送中断，无法返回主程序

配置程序如下：

#include "busart.h"
static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = DEBUG_USART_IRQ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void USART_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
DEBUG_USART_GPIO_APBxClkCmd(DEBUG_USART_GPIO_CLK, ENABLE);
DEBUG_USART_APBxClkCmd(DEBUG_USART_CLK, ENABLE);
GPIO_InitStructure.GPIO_Pin = DEBUG_USART_TX_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(DEBUG_USART_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = DEBUG_USART_RX_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(DEBUG_USART_RX_GPIO_PORT, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = DEBUG_USART_BAUDRATE;
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(DEBUG_USARTx, &USART_InitStructure);
NVIC_Configuration();
USART_ITConfig(DEBUG_USARTx, USART_IT_RXNE, ENABLE);
USART_Cmd(DEBUG_USARTx, ENABLE);
}
void Usart_SendByte(USART_TypeDef* pUSARTx, uint8_t data)
{
USART_SendData(pUSARTx, data);
while( USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET );
}
void Usart_SendHalfWord(USART_TypeDef* pUSARTx, uint16_t data)
{
uint8_t temp_h,temp_l;
temp_h = (data&0xff00) >> 8 ;
temp_l = data&0xff;
USART_SendData(pUSARTx, temp_h);
while( USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET );
USART_SendData(pUSARTx, temp_l);
while( USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET );
}
void Usart_SendArray(USART_TypeDef* pUSARTx, uint8_t *array,uint8_t num)
{
uint8_t i;
for( i=0; i<num; i++ )
{
Usart_SendByte(pUSARTx, array[i]);
}
while( USART_GetFlagStatus(pUSARTx, USART_FLAG_TC) == RESET );
}
void Usart_SendStr(USART_TypeDef* pUSARTx, uint8_t *str)
{
uint8_t i=0;
do
{
Usart_SendByte(pUSARTx, *(str+i));
i++;
}while(*(str+i) != '\0');
while( USART_GetFlagStatus(pUSARTx, USART_FLAG_TC) == RESET );
}

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中断服务程序如下：

void DEBUG_USART_IRQHandler(void)
{
uint8_t ucTemp;
if(USART_GetITStatus(DEBUG_USARTx,USART_IT_RXNE)!=RESET)
{
ucTemp = USART_ReceiveData(DEBUG_USARTx);
USART_SendData(DEBUG_USARTx,ucTemp);
}
}

复制代码

ID:719370 · 发表于 2020-3-31 11:12

没有清除发送中断标志

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