1.根据选择的串口使能中断,由于需要,我将串口空闲(IDLE)中断时能,并使能串口接收中断
HAL_NVIC_EnableIRQ(USART3_IRQn);//使能USART3中断
HAL_NVIC_SetPriority(USART3_IRQn,3,3);//配置USART3的优先级
HAL_UART_Receive_IT(&huart3,correction_Table, datalength);//correction_Table是申请的数组首地址
__HAL_UART_ENABLE_IT(&huart3, UART_IT_IDLE); //使能串口空闲(IDLE)中断
2.在中断函数中调用HAL_UART_IRQHandler(&huart3)函数,并判断是否有IDLE中断 ,IDLE中断的作用是用来接收可变的数据量,当发送的数据个数小于datalength时可以根据读取出(&huart3)->RxXferCount的值来判断接收到的数据个数
void USART3_IRQHandler(void)
{
uint32_t value_RxXferSize=0;
uint32_t value_RxXferCount=0;
uint32_t temp_IDLE_flag=0;
temp_IDLE_flag=__HAL_UART_GET_FLAG(&huart3,UART_FLAG_IDLE);//检测UART是否是空闲中断
if(temp_IDLE_flag!=RESET)
{
__HAL_UART_CLEAR_IDLEFLAG(&huart3);//清除UART的空闲(IDLE)中断
value_RxXferSize= (&huart3)->RxXferSize; /*!< UART Rx Transfer size */
value_RxXferCount= (&huart3)->RxXferCount; /*!< UART Rx Transfer Counter */
}
HAL_UART_IRQHandler(&huart3);//这个函数的功能包含了接收UART数据的功能 是调用了 UART_Receive_IT(huart)来实 现的
}
3.UART_Receive_IT(UART_HandleTypeDef *huart)的实现如下,当接收到的数据个数 RxXferCount达到预定的值时,代码
if(--huart->RxXferCount == 0U) 会先关闭UART的接收中断__HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);然后调用回调函数 HAL_UART_RxCpltCallback(huart);
static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart)
{
uint16_t* tmp;
/* Check that a Rx process is ongoing */
if(huart->RxState == HAL_UART_STATE_BUSY_RX)
{
if(huart->Init.WordLength == UART_WORDLENGTH_9B)
{
tmp = (uint16_t*) huart->pRxBuffPtr;
if(huart->Init.Parity == UART_PARITY_NONE)
{
*tmp = (uint16_t)(huart->Instance->DR & (uint16_t)0x01FF);
huart->pRxBuffPtr += 2U;
}
else
{
*tmp = (uint16_t)(huart->Instance->DR & (uint16_t)0x00FF);
huart->pRxBuffPtr += 1U;
}
}
else
{
if(huart->Init.Parity == UART_PARITY_NONE)
{
*huart->pRxBuffPtr++ = (uint8_t)(huart->Instance->DR & (uint8_t)0x00FF);
}
else
{
*huart->pRxBuffPtr++ = (uint8_t)(huart->Instance->DR & (uint8_t)0x007F);
}
}
if(--huart->RxXferCount == 0U)
{
/* Disable the IRDA Data Register not empty Interrupt */
__HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);//关闭UART的接收中断
/* Disable the UART Parity Error Interrupt */
__HAL_UART_DISABLE_IT(huart, UART_IT_PE);
/* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
__HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
/* Rx process is completed, restore huart->RxState to Ready */
huart->RxState = HAL_UART_STATE_READY;
HAL_UART_RxCpltCallback(huart);
return HAL_OK;
}
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
4.系统自带的回调函数,我测试的时候不好用,所以将其注释掉,自己写了一个简单的功能 void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)。功能如下,重新配置 HAL_UART_Receive_IT(huart,correction_Table, datalength);函数,由于在第3步关闭了UART的接收中断,所以要在此使能UART中断
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart==&huart3)
{
HAL_UART_Receive_IT(huart,correction_Table, datalength);//重新配置
__HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);//使能UART中断
}
}
1.根据选择的串口使能中断,由于需要,我将串口空闲(IDLE)中断时能,并使能串口接收中断
HAL_NVIC_EnableIRQ(USART3_IRQn);//使能USART3中断
HAL_NVIC_SetPriority(USART3_IRQn,3,3);//配置USART3的优先级
HAL_UART_Receive_IT(&huart3,correction_Table, datalength);//correction_Table是申请的数组首地址
__HAL_UART_ENABLE_IT(&huart3, UART_IT_IDLE); //使能串口空闲(IDLE)中断
2.在中断函数中调用HAL_UART_IRQHandler(&huart3)函数,并判断是否有IDLE中断 ,IDLE中断的作用是用来接收可变的数据量,当发送的数据个数小于datalength时可以根据读取出(&huart3)->RxXferCount的值来判断接收到的数据个数
void USART3_IRQHandler(void)
{
uint32_t value_RxXferSize=0;
uint32_t value_RxXferCount=0;
uint32_t temp_IDLE_flag=0;
temp_IDLE_flag=__HAL_UART_GET_FLAG(&huart3,UART_FLAG_IDLE);//检测UART是否是空闲中断
if(temp_IDLE_flag!=RESET)
{
__HAL_UART_CLEAR_IDLEFLAG(&huart3);//清除UART的空闲(IDLE)中断
value_RxXferSize= (&huart3)->RxXferSize; /*!< UART Rx Transfer size */
value_RxXferCount= (&huart3)->RxXferCount; /*!< UART Rx Transfer Counter */
}
HAL_UART_IRQHandler(&huart3);//这个函数的功能包含了接收UART数据的功能 是调用了 UART_Receive_IT(huart)来实 现的
}
3.UART_Receive_IT(UART_HandleTypeDef *huart)的实现如下,当接收到的数据个数 RxXferCount达到预定的值时,代码
if(--huart->RxXferCount == 0U) 会先关闭UART的接收中断__HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);然后调用回调函数 HAL_UART_RxCpltCallback(huart);
static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart)
{
uint16_t* tmp;
/* Check that a Rx process is ongoing */
if(huart->RxState == HAL_UART_STATE_BUSY_RX)
{
if(huart->Init.WordLength == UART_WORDLENGTH_9B)
{
tmp = (uint16_t*) huart->pRxBuffPtr;
if(huart->Init.Parity == UART_PARITY_NONE)
{
*tmp = (uint16_t)(huart->Instance->DR & (uint16_t)0x01FF);
huart->pRxBuffPtr += 2U;
}
else
{
*tmp = (uint16_t)(huart->Instance->DR & (uint16_t)0x00FF);
huart->pRxBuffPtr += 1U;
}
}
else
{
if(huart->Init.Parity == UART_PARITY_NONE)
{
*huart->pRxBuffPtr++ = (uint8_t)(huart->Instance->DR & (uint8_t)0x00FF);
}
else
{
*huart->pRxBuffPtr++ = (uint8_t)(huart->Instance->DR & (uint8_t)0x007F);
}
}
if(--huart->RxXferCount == 0U)
{
/* Disable the IRDA Data Register not empty Interrupt */
__HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);//关闭UART的接收中断
/* Disable the UART Parity Error Interrupt */
__HAL_UART_DISABLE_IT(huart, UART_IT_PE);
/* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
__HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
/* Rx process is completed, restore huart->RxState to Ready */
huart->RxState = HAL_UART_STATE_READY;
HAL_UART_RxCpltCallback(huart);
return HAL_OK;
}
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
4.系统自带的回调函数,我测试的时候不好用,所以将其注释掉,自己写了一个简单的功能 void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)。功能如下,重新配置 HAL_UART_Receive_IT(huart,correction_Table, datalength);函数,由于在第3步关闭了UART的接收中断,所以要在此使能UART中断
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart==&huart3)
{
HAL_UART_Receive_IT(huart,correction_Table, datalength);//重新配置
__HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);//使能UART中断
}
}
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