Stellaris Launchpad baud rate

As stated - your other/earlier post - UART3 exposes that limitation which is not an MCU limitation but one introduced by Stdio - and which can be fixed by modeling UART3 after lower numbered UART configurations w/in that Stdio code.

I am  confused about your reply. I am not using any custom designed board.

I am using the  Stellaris Launchpad with the Hello world example from the TivaWare_C_Series-1.0 software provided by Ti.

In this the hello.c program seems to set the baud rate by the following code. If I set the baud rate in this hello.c to 9600 and ccs terminal it seems to work. If I set the baud rate in the hello.c and the CCS terminal to 115200 it does not work.

1. Does Stellaris Launchpad debug port have baud rate limited to 9600 baud?

2. If not, what change should I make in the code to make it work?

ConfigureUART(void)

{

    //

    // Enable the GPIO Peripheral used by the UART.

    //

    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

    //

    // Enable UART0

    //

    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

    //

    // Configure GPIO Pins for UART mode.

    //

    ROM_GPIOPinConfigure(GPIO_PA0_U0RX);

    ROM_GPIOPinConfigure(GPIO_PA1_U0TX);

    ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //

    // Use the internal 16MHz oscillator as the UART clock source.

    //

    UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC);

    //

    // Initialize the UART for console I/O.

    //

    UARTStdioConfig(0, 115200, 16000000);

}

vijay kumar14480 said:

I am not using any custom designed board.

No one made such (custom board) claim! 

Your initial post suggest this baud rate limitation is confined to UART3 ("The code does not work at 115200 baud on COM3") - and your latest code now moves to UART0 - thus you present a "moving target" - complicating diagnosis.

A baud rate limitation has been observed (and reported) on the higher order UART ports when employing "Stdio."

I don't know how to make this more clear...

COM3 is what shows up in my CCS Terminal, so I think it is related to the Code composer studio.

The code I am using seems to be using  port0.

So, I do not think the limitation stdio you cite is not applicable here.

Thanks.

Hi Markel,

Excellent. It worked with Terra Term at 115200 baud.

Looks like CCS terminal will not work at 115200 baud.

Thanks for solving my issue.

vijay kumar14480 said:

Looks like CCS terminal will not work at 115200 baud.