LPC1837 UART Help needed

lpcware — Wed, 15 Jun 2016 18:20:39 GMT

Content originally posted in LPCWare by jb111 on Tue Jan 27 20:01:52 MST 2015
Hi,

I am using a LPC1837JET100 and trying to get UART0 working. I am using LPCXpresso. The U0_TXD pin is held high. It is not a hardware problem as I was able to toggle the pin when I set it as a GPIO (it was GPIO5[0]). At the moment I'm not concerned about baud rate and other options so I used the defaults provided in UART_ConfigStructInit(). I just want to be able to see the pin changing.

I am using the uart driver provided in the lpc18xx_uart.h header. Below is my code, it compiles fine and Im not doing anything else.

Any help would be greatly appreciated.
Thanks in advanced

    //Initialing UART0 with functions given in lpc18xx_uart.h
    UART_CFG_Type uartCfg;
    UART_ConfigStructInit(&uartCfg);
    UART_Init(LPC_USART0,&uartCfg);

    //set gpio to flash led
    GPIO_SetDir(PORT1,LED0,GPIO_DIR_OUT);

    while(1)
    {
            //send character and flash LED
        UART_SendByte(LPC_USART0,(uint8_t)'a');
        GPIO_ToggleValue(PORT1,LED0);

            //wait
    int i=0;
    for(i;i<1000000;i++)
    {
    }
    }

Re: LPC1837 UART Help needed

lpcware — Wed, 15 Jun 2016 18:20:40 GMT

Content originally posted in LPCWare by jb111 on Tue Jan 27 22:38:29 MST 2015
Problem solved!

I had to use the UART_TxCmd() function before transmitting....

LPC MicrocontrollersのトピックLPC1837 UART Help needed

LPC1837 UART Help needed

Re: LPC1837 UART Help needed