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cc3200 use UART both ports 0n CC3200

mina kim
Prodigy 10 points

Other Parts Discussed in Thread: CC3200

Hi Guys,

I want to use both uart ports on the board. From an example(uartecho), I could find how to use a uart, but I would like use all uart on the board(there is two uart ports on the board).

Is there any suggestion and example?

Thank you

  • 0
    TI__Guru* 85400 points
    Moving this to the CC3200 forum.

    Regards,
    Gigi Joseph.
  • 0
    TI__Expert 6700 points
    Hi Mina,

    CC3200 has two UARTs (UARTA0 and UARTA1). For UARTA0 please refer to 'uart_demo' SDK example. For UARTA1 there are no examples but you can keep the 'uart_demo' as reference for configuring UARTA1 yourself.

    Basically changing the base address definition UARTA0_BASE to UARTA1_BASE

    Please note that only UARTA0 is routed to USB port on the LP. UARTA1 comes on the header.

    Thanks and Regards,
    Praveen
  • 0 in reply to Praveen Kumar N
    TI__Expert 6700 points
    Hi,

    Were you able to get the UARTs working on your setup ? If so, please mark this thread as answered to close it.

    Thanks and Regards,
    Praveen
  • 0 in reply to Praveen Kumar N
    Prodigy 90 points

    Same problem, no solution yet...

    pinmuxconfig.c fragment (same as pinmux utility output):

        MAP_PRCMPeripheralClkEnable(PRCM_UARTA0, PRCM_RUN_MODE_CLK);
        MAP_PRCMPeripheralClkEnable(PRCM_UARTA1, PRCM_RUN_MODE_CLK);
        // UART 0
        MAP_PinTypeUART(PIN_55, PIN_MODE_3);
        MAP_PinTypeUART(PIN_57, PIN_MODE_3);
        // UART 1
        MAP_PinTypeUART(PIN_07, PIN_MODE_5);
        MAP_PinTypeUART(PIN_08, PIN_MODE_5);

    Shorted pins P2-3 and P2-6 (pins 7 and 8) just in case if the floating UART receiver input sees something that makes it go nuts. main.c fragment:

        InitTerm();
        MAP_UARTConfigSetExpClk(UARTA1_BASE, PRCMPeripheralClockGet(PRCM_UARTA1),
                38400, (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
                UART_CONFIG_PAR_NONE));

    InitTerm is effectively same thing as the function call, with all values hard-coded:

      MAP_UARTConfigSetExpClk(CONSOLE,MAP_PRCMPeripheralClockGet(CONSOLE_PERIPH),
                      UART_BAUD_RATE, (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
                       UART_CONFIG_PAR_NONE));

    When I execute

                    MAP_UARTCharPut(UARTA1_BASE, 0x01);
    from a task, the task hangs. When I restart the debugger and reload the code, the code hangs in UARTConfigSetExpClk function on line

    UARTDisable(ulBase);

    The hangup is caused by the UART still being busy trying to transmit the 0x01 byte. Only if I press the reset button on the board and then reload and restart the code, it goes through initialization and hangs in the MAP_UARTCharPut(UARTA1_BASE, 0x01); again.

  • 0 in reply to Aare Tali
    Prodigy 90 points

    Don't know what happened, but for a long while this code failed to work, but now with no changes to that code it fails to fail (i.e. it works).