MSPM0L1306: Need to print to the Code Composer Studio Console

Ethan Galloway

Part Number: MSPM0L1306

Hello MSPM0 Team,

I'm trying to print to the CCS console using a MSPM0L1306. I'm currently following this E2E for a guideline, but I can't get this to work. I'm not seeing any output in the consoles.

Here's the code I currently have:

#include "stdio.h"
#include "ti/drivers/UART.h"
#include "string.h"

volatile int TXChar = -1;

char TXData[64];

void StartSerialTX(char *str) {

  while (TXChar != -1) {
    // wait for previous tx to finish
    delay_cycles(10000);
  }

  strcpy(TXData, str);

  TXChar = 0;

  DL_UART_Main_transmitData(UART_0_INST, TXData[TXChar++]);
}

void UART_0_INST_IRQHandler(void) {
  switch (DL_UART_Main_getPendingInterrupt(UART_0_INST)) {

  case DL_UART_MAIN_IIDX_RX:
    //RXdata = DL_UART_Main_receiveData(UART_0_INST);
    // DL_UART_Main_transmitData(UART_0_INST, RXdata);
    break;

  case DL_UART_MAIN_IIDX_TX:
    if (TXData[TXChar] != '\0') {
      DL_UART_Main_transmitData(UART_0_INST, TXData[TXChar++]);
    } else {
      TXChar = -1;
    }

    break;

  default:
    break;
  }
}

int main(void)
{
    char *buf = "Hello!\n";
    StartSerialTX(buf);

   //Other code function have been removed for brevity
}

Is there anything I'm currently doing incorrectly here?

Thanks for working on this!

Best Regards,
Ethan Galloway

4 months ago

0 Keith Barkley 4 months ago

Guru 43405 points

This won't print on the console, but the serial terminal via the back channel UART.

Here is where I previously asked about the serial console

CODECOMPOSER: CCS Theia: Where is the Serial Terminal hiding?

0 Ethan Galloway 4 months ago in reply to Keith Barkley

TI__Mastermind 38206 points

Ah, got it. I've checked the serial console, but I'm not seeing any output there.

0 JD Crutchfield 4 months ago in reply to Ethan Galloway

TI__Mastermind 30415 points

Hello Ethan,

I didn't review your code but another common issue is the jumpers on the Launchpad. For L1306, I believe you just need to make sure the RXD/TXD jumpers are populated on the J101 programming headers.

Idk if you're running into the mystery problem that Keith was mentioning, but maybe also try putty. I do feel like CCS serial console used to be a bit picky so I would also maybe just try unplugging the Launchpad and restarting CCS.

Thanks,

Arm-based microcontrollers

Arm-based microcontrollers forum

MSPM0L1306: Need to print to the Code Composer Studio Console