問題： 發送完信息后，卡死在發送中斷，無法返回主程序
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 );
- }
- 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);
- }
- }
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