stm32串口通过dma发送数组的hal库代码

很高兴回答你的问题。以下是一个使用HAL库的示例代码，用于通过DMA发送数组：

#include "stm32f4xx_hal.h"

// Initialize the DMA and UART for sending data
void dma_uart_init(void) {
    // Enable the DMA and UART clocks
    __HAL_RCC_DMA1_CLK_ENABLE();
    __HAL_RCC_USART1_CLK_ENABLE();

    // Configure the UART
    UART_HandleTypeDef huart;
    huart.Instance = USART1;
    huart.Init.BaudRate = 115200;
    huart.Init.WordLength = UART_WORDLENGTH_8B;
    huart.Init.StopBits = UART_STOPBITS_1;
    huart.Init.Parity = UART_PARITY_NONE;
    huart.Init.Mode = UART_MODE_TX;

    // Configure the DMA
    DMA_HandleTypeDef hdma_usart_tx;
    hdma_usart_tx.Instance = DMA1_Stream1;
    hdma_usart_tx.Init.Channel = DMA_CHANNEL_4;
    hdma_usart_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
    hdma_usart_tx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_usart_tx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_usart_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_usart_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_usart_tx.Init.Mode = DMA_NORMAL;
    hdma_usart_tx.Init.Priority = DMA_PRIORITY_HIGH;
    hdma_usart_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    hdma_usart_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
    hdma_usart_tx.Init.MemBurst = DMA_MBURST_SINGLE;
    hdma_usart_tx.Init.PeriphBurst = DMA_PBURST_SINGLE;

    // Initialize the DMA and UART peripherals
    HAL_DMA_Init(&hdma_usart_tx);
    HAL_UART_Init(&huart);

    // Connect the DMA to the UART
    __HAL_LINKDMA(&huart, hdmatx, hdma_usart_tx);

    // Enable the UART
    HAL_UART_MspInit(&huart);
}

// Send an array using DMA
void dma_send_array(uint8_t *buf, uint16_t len) {
    // Start the DMA transfer
    HAL_UART_Transmit_DMA(&huart, buf, len);

    // Wait for the transfer to complete
    HAL_UART_Transmit_DMA(&huart, buf, len);

    // Disable the DMA
    HAL_DMA_DeInit(&hdma_usart_tx);

    // Disable the UART
    HAL_UART_MspDeInit(&huart);
}

请注意，上述代码仅是一个示例，你需要根据你的实际需求来进行修改。同时，还需要注意DMA的缓冲区大小和使用频率，以免引起不必要的问题。希望对您有所帮助！