[参考译文] IWR6843AOP：MSS 上带有 DMA 的 UART 只能发送输出数据、但无法接收

    // let uart b work with tx/rx
    extern UART_Config UART_config[];
    UartSci_HwCfg* hwcfg = (UartSci_HwCfg*) UART_config[1].hwAttrs;
    hwcfg->duplexity = UartSci_Duplexity_FULL;
    
#if UART_WIFI_USE_DMA
    DMA_init ();
#endif
    UART_init();
    
    UART_Params_init(&uartParams);
    uartParams.writeDataMode = UART_DATA_BINARY;
    uartParams.readDataMode = UART_DATA_BINARY;
    uartParams.readReturnMode = UART_RETURN_FULL;
    uartParams.readEcho = UART_ECHO_OFF;
    uartParams.clockFrequency = gFdMCB.cfg.platformCfg.sysClockFrequency;
    uartParams.baudRate       = gFdMCB.cfg.platformCfg.commandBaudRate;
    uartParams.isPinMuxDone   = 1U;
    uartParams.readTimeout = 50;

#if UART_WIFI_USE_DMA
    DMA_Params      dmaParams;
    DMA_Params_init(&dmaParams);
    DMA_Handle   DMAHandle;
    DMAHandle = DMA_open(1, &dmaParams, &errCode);
    if (DMAHandle == NULL)
    {
        printf ("Error: Unable to open the DMA Instance [Error code %d]\n", errCode);
        log_write_fmt ("Error: Unable to open the DMA Instance [Error code %d]\n", errCode);
        return;
    }

    uartParams.dmaHandle = DMAHandle;
    uartParams.txDMAChannel = 1;
    uartParams.rxDMAChannel = 2;

#endif

    /* Open the wifi UART Instance: */
    UART_Handle uartHandle = UART_open(1, &uartParams);
    if (uartHandle == NULL)
    {
        //System_printf("Error: Unable to open the Wifi UART Instance\n");
        log_write("Error: Unable to open the Wifi UART Instance\n");
        tvt_debugAssert (0);
        return;
    }