举例:HAL_UART_Receive_IT(&huart1,(uint8_t*)&value,1);//中断接收一个字符,存储到value中 2、串口中断函数 HAL_UART_IRQHandler(UART_HandleTypeDef *huart); //串口中断处理函数 HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart); //串口发送中断回调函数 HAL_UART_TxHalfCpltCallback(UART_HandleTy...
huart->ErrorCode = HAL_UART_ERROR_NONE; huart->gState = HAL_UART_STATE_BUSY_TX;/* Process Unlocked */__HAL_UNLOCK(huart);/* Enable the UART Transmit data register empty Interrupt */__HAL_UART_ENABLE_IT(huart, UART_IT_TXE);returnHAL_OK; }else{returnHAL_BUSY; } } 此外我们还会...
__HAL_LOCK(huart); huart->pTxBuffPtr = pData; huart->TxXferSize = Size; huart->TxXferCount = Size; huart->ErrorCode = HAL_UART_ERROR_NONE; huart->gState = HAL_UART_STATE_BUSY_TX; /* Process Unlocked */ __HAL_UNLOCK(huart); /* Enable the UART Transmit data register empty...
如果 gState 的值等于 HAL_UART_STATE_RESET,则认为串口未被初始化,此时,分配锁资源,并且调用 HAL_UART_MspInit 函数来对串口的 GPIO 和时钟进行初始化。 9)gState,RxState:分别是 UART 的发送状态、工作状态的结构体和 UART 接受状态的结构 体。HAL_UART_StateTypeDef 是一个枚举类型,列出串口在工作过程中的...
and also related to Tx operations. This parameter can be a value of @ref HAL_UART_StateTypeDef */ __IOHAL_UART_StateTypeDefRxState;/*!< UART state information related to Rx operations. This parameter can be a value of @ref HAL_UART_StateTypeDef */ ...
HAL_UART_STATE_BUSY_TX = 0x12, /*!< Data Transmission process is ongoing */ HAL_UA...
huart->gState = HAL_UART_STATE_BUSY_TX;/* Init tickstart for timeout managment*/ tickstart ...
研究了下源码，可以发现，发送的时候，会把串口状态huart->gState标记为发送忙HAL_UART_STATE_BUSY_TX...
使用STM32CubeMX生成初始化代码。问题:HAL_UART_Transmit_DMA函数只能调用一次,第二次就返回状态HAL_UART_STATE_BUSY 0x02。原因:stm32l1xx_hal_uart.c开头有描述 (##) DMA Configuration if you need to use
static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart) { uint16_t* tmp; uint16_t uhMask = huart->Mask; /* Check that a Rx process is ongoing */ if(huart->RxState == HAL_UART_STATE_BUSY_RX) { if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init...