请问stm32f429的uart8 dma收发不能正常工作怎么解决？

驱动配置没写完

drv_usart.c文件中stm32_uart_get_dma_config只配置了uart1~6的DMA，uart7和uart8需要自己加一下

static void stm32_uart_get_dma_config(void)

{

#ifdef BSP_USING_UART1

    uart_obj[UART1_INDEX].uart_dma_flag = 0;

#ifdef BSP_UART1_RX_USING_DMA

    uart_obj[UART1_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;

    static struct dma_config uart1_dma_rx = UART1_DMA_RX_CONFIG;

    uart_config[UART1_INDEX].dma_rx = &uart1_dma_rx;

#endif

#ifdef BSP_UART1_TX_USING_DMA

    uart_obj[UART1_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_TX;

    static struct dma_config uart1_dma_tx = UART1_DMA_TX_CONFIG;

    uart_config[UART1_INDEX].dma_tx = &uart1_dma_tx;

#endif

#endif

#ifdef BSP_USING_UART2

    uart_obj[UART2_INDEX].uart_dma_flag = 0;

#ifdef BSP_UART2_RX_USING_DMA

    uart_obj[UART2_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;

    static struct dma_config uart2_dma_rx = UART2_DMA_RX_CONFIG;

    uart_config[UART2_INDEX].dma_rx = &uart2_dma_rx;

#endif

#ifdef BSP_UART2_TX_USING_DMA

    uart_obj[UART2_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_TX;

    static struct dma_config uart2_dma_tx = UART2_DMA_TX_CONFIG;

    uart_config[UART2_INDEX].dma_tx = &uart2_dma_tx;

#endif

#endif

#ifdef BSP_USING_UART3

    uart_obj[UART3_INDEX].uart_dma_flag = 0;

#ifdef BSP_UART3_RX_USING_DMA

    uart_obj[UART3_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;

    static struct dma_config uart3_dma_rx = UART3_DMA_RX_CONFIG;

    uart_config[UART3_INDEX].dma_rx = &uart3_dma_rx;

#endif

#ifdef BSP_UART3_TX_USING_DMA

    uart_obj[UART3_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_TX;

    static struct dma_config uart3_dma_tx = UART3_DMA_TX_CONFIG;

    uart_config[UART3_INDEX].dma_tx = &uart3_dma_tx;

#endif

#endif

#ifdef BSP_USING_UART4

    uart_obj[UART4_INDEX].uart_dma_flag = 0;

#ifdef BSP_UART4_RX_USING_DMA

    uart_obj[UART4_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;

    static struct dma_config uart4_dma_rx = UART4_DMA_RX_CONFIG;

    uart_config[UART4_INDEX].dma_rx = &uart4_dma_rx;

#endif

#ifdef BSP_UART4_TX_USING_DMA

    uart_obj[UART4_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_TX;

    static struct dma_config uart4_dma_tx = UART4_DMA_TX_CONFIG;

    uart_config[UART4_INDEX].dma_tx = &uart4_dma_tx;

#endif

#endif

#ifdef BSP_USING_UART5

    uart_obj[UART5_INDEX].uart_dma_flag = 0;

#ifdef BSP_UART5_RX_USING_DMA

    uart_obj[UART5_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;

    static struct dma_config uart5_dma_rx = UART5_DMA_RX_CONFIG;

    uart_config[UART5_INDEX].dma_rx = &uart5_dma_rx;

#endif

#ifdef BSP_UART5_TX_USING_DMA

    uart_obj[UART5_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_TX;

    static struct dma_config uart5_dma_tx = UART5_DMA_TX_CONFIG;

    uart_config[UART5_INDEX].dma_tx = &uart5_dma_tx;

#endif

#endif

#ifdef BSP_USING_UART6

    uart_obj[UART6_INDEX].uart_dma_flag = 0;

#ifdef BSP_UART6_RX_USING_DMA

    uart_obj[UART6_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;

    static struct dma_config uart6_dma_rx = UART6_DMA_RX_CONFIG;

    uart_config[UART6_INDEX].dma_rx = &uart6_dma_rx;

#endif

#ifdef BSP_UART6_TX_USING_DMA

    uart_obj[UART6_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_TX;

    static struct dma_config uart6_dma_tx = UART6_DMA_TX_CONFIG;

    uart_config[UART6_INDEX].dma_tx = &uart6_dma_tx;

#endif

#endif

}