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如何使用stm32 cubeMX配置生成工程？

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问答对人有帮助，内容完整，我也想知道答案 0 如何使用STM32 cubeMX配置生成工程？ 0
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答案对人有帮助，有参考价值 0 使用stm32 cubeMX配置生成工程发送数据的时候可以发送第一包数据，进入的数据直接跳过了，过了，了，，，仿真的时候没有任何问题，可以所有数据上图分析：封装stxm2F4中文参考手册使能这种模式（将DMA_SCR3寄存器中的EN位置1）时，数据流会立即启动传输，从源完全填充FIFO 如果DMA_SxNDTR寄存器获取零、外设请求传输终止（在使用设备外设请求传输终止）流控制器的情况下）或DMA_SxCR寄存器中的EN位由软件清零，传输即会停止。结合代码： //使能DMA数据流立即启动传输 #define __HAL_DMA_ENABLE(__HANDLE__) ((__HANDLE__)->Instance->CR \|= DMA_SxCR_EN) //传输终止 #define __HAL_DMA_DISABLE(__HANDLE__) ((__HANDLE__)->Instance->CR &= ~DMA_SxCR_EN) HAL_StatusTypeDef HAL_UART_Transmit_DMA(UART_HandleTypeDef huart, uint8_t pData, uint16_t Size) { uint32_t tmp; / Check that a Tx process is not already ongoing / if(huart->gState == HAL_UART_STATE_READY) { if((pData == NULL ) \|\| (Size == 0)) { return HAL_ERROR; } / Process Locked / __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; / Set the UART DMA transfer complete callback / huart->hdmatx->XferCpltCallback = UART_DMATransmitCplt; / Set the UART DMA Half transfer complete callback / huart->hdmatx->XferHalfCpltCallback = UART_DMATxHalfCplt; / Set the DMA error callback / huart->hdmatx->XferErrorCallback = UART_DMAError; / Set the DMA abort callback / huart->hdmatx->XferAbortCallback = NULL; / Enable the UART transmit DMA Stream / tmp = (uint32_t)&pData; HAL_DMA_Start_IT(huart->hdmatx, (uint32_t)tmp, (uint32_t)&huart->Instance->DR, Size); /* Clear the TC flag in the SR register by writing 0 to it / __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC); / Process Unlocked / __HAL_UNLOCK(huart); / Enable the DMA transfer for transmit request by setting the DMAT bit in the UART CR3 register / SET_BIT(huart->Instance->CR3, USART_CR3_DMAT); return HAL_OK; } else { return HAL_BUSY; } } HAL_StatusTypeDef HAL_DMA_Start_IT(DMA_HandleTypeDef hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength) { HAL_StatusTypeDef status = HAL_OK; /* calculate DMA base and stream number / DMA_Base_Registers regs = (DMA_Base_Registers )hdma->StreamBaseAddress; / Check the parameters / assert_param(IS_DMA_BUFFER_SIZE(DataLength)); / Process locked / __HAL_LOCK(hdma); if(HAL_DMA_STATE_READY == hdma->State) { / Change DMA peripheral state / hdma->State = HAL_DMA_STATE_BUSY; / Initialize the error code / hdma->ErrorCode = HAL_DMA_ERROR_NONE; / Configure the source, destination address and the data length / DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength); / Clear all interrupt flags at correct offset within the register / regs->IFCR = 0x3FU << hdma->StreamIndex; / Enable Common interrupts/ hdma->Instance->CR \|= DMA_IT_TC \| DMA_IT_TE \| DMA_IT_DME; hdma->Instance->FCR \|= DMA_IT_FE; if(hdma->XferHalfCpltCallback != NULL) { hdma->Instance->CR \|= DMA_IT_HT; } / Enable the Peripheral / __HAL_DMA_ENABLE(hdma); } else { / Process unlocked / __HAL_UNLOCK(hdma); / Return error status / status = HAL_BUSY; } return status; } 在DMA发送中断中加入DMA中断使能即可 HAL_NVIC_SetPriority(DMA2_Stream7_IRQn, 1, 3); HAL_NVIC_EnableIRQ(DMA2_Stream7_IRQn); 直接上代码吧 / USART1 init function / static void MX_USART1_UART_Init(uint32_t BaudRate) { huart1.Instance = USART1; huart1.Init.BaudRate = 256000; huart1.Init.WordLength = UART_WORDLENGTH_8B; huart1.Init.StopBits = UART_STOPBITS_1; huart1.Init.Parity = UART_PARITY_NONE; huart1.Init.Mode = UART_MODE_TX_RX; huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart1.Init.OverSampling = UART_OVERSAMPLING_16; if (HAL_UART_Init(&huart1) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } } void HAL_UART_MspInit(UART_HandleTypeDef huart) { GPIO_InitTypeDef GPIO_InitStruct; if(huart->Instance==USART1) { /* USER CODE BEGIN USART1_MspInit 0 / / USER CODE END USART1_MspInit 0 / / Peripheral clock enable / __HAL_RCC_USART1_CLK_ENABLE(); /USART1 GPIO Configuration PA9 ------> USART1_TX PA10 ------> USART1_RX / GPIO_InitStruct.Pin = GPIO_PIN_9\|GPIO_PIN_10; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_InitStruct.Alternate = GPIO_AF7_USART1; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /* USART1 DMA Init / / USART1_RX Init / hdma_usart1_rx.Instance = DMA2_Stream2; hdma_usart1_rx.Init.Channel = DMA_CHANNEL_4; hdma_usart1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY; hdma_usart1_rx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_usart1_rx.Init.MemInc = DMA_MINC_ENABLE; hdma_usart1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_usart1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_usart1_rx.Init.Mode = DMA_NORMAL; hdma_usart1_rx.Init.Priority = DMA_PRIORITY_VERY_HIGH; hdma_usart1_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE; if (HAL_DMA_Init(&hdma_usart1_rx) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } __HAL_LINKDMA(huart,hdmarx,hdma_usart1_rx); / USART1_TX Init / hdma_usart1_tx.Instance = DMA2_Stream7; hdma_usart1_tx.Init.Channel = DMA_CHANNEL_4; hdma_usart1_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_usart1_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_usart1_tx.Init.MemInc = DMA_MINC_ENABLE; hdma_usart1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_usart1_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_usart1_tx.Init.Mode = DMA_NORMAL; hdma_usart1_tx.Init.Priority = DMA_PRIORITY_HIGH; hdma_usart1_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE; if (HAL_DMA_Init(&hdma_usart1_tx) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } __HAL_LINKDMA(huart,hdmatx,hdma_usart1_tx); / USART1 interrupt Init / HAL_NVIC_SetPriority(USART1_IRQn, 1, 3); HAL_NVIC_EnableIRQ(USART1_IRQn); HAL_NVIC_SetPriority(DMA2_Stream7_IRQn, 1, 3); HAL_NVIC_EnableIRQ(DMA2_Stream7_IRQn); / USER CODE BEGIN USART1_MspInit 1 / / USER CODE END USART1_MspInit 1 / } } //不使用DMA发送 int fputc(int ch,FILE f) { while((USART1->SR & 0x40) == 0); USART1->DR = (uint8_t)ch; return ch; } //使用DMA发送 void myprintf(UART_HandleTypeDef huart, char fmt,...){ char buffer[CMD_BUF_LEN-1]; uint8_t len=0; va_list arg_ptr; va_start(arg_ptr, fmt); len = vsnprintf(buffer, CMD_BUF_LEN+1, fmt, arg_ptr); //HAL_UART_Transmit(huart, (uint8_t)buffer, len, 1len); while(HAL_BUSY == HAL_UART_Transmit_DMA(huart, (uint8_t*)buffer, len)); va_end(arg_ptr); } //测试函数 //不使用DMA发送 printf( "system config completen"); printf( "system config complete2nnn"); //使用DMA发送 myprintf(&huart1, "hello stm32n"); myprintf(&huart1, "hello stm32 next1n"); myprintf(&huart1, "hello stm32 next2n"); myprintf(&huart1, "hello stm32 next3n"); myprintf(&huart1, "hello stm32 next4n"); myprintf(&huart1, "hello stm32 next5n"); myprintf(&huart1, "hello stm32 next6n"); 测试结果：

2021-12-6 14:06:14 评论举报贾埃罗