LP-MSPM0L1306: implementing printf() via onboard debugger without UART

Hi Sungwoo,

Sorry for late response.  To enable printf() in CCS you must use #include "stdio.h", then set the heap size = 1024 in project settings > linker > basic options. 

 printf("Hello MSPM0\r\n");  Note the \r\n.  If you don't include these, nothing will print.  These are required because printf is line buffered.

See this E2E-> https://e2e.ti.com/support/tools/code-composer-studio-group/ccs/f/code-composer-studio-forum/471920/printf-to-console

Hello.

I tested it, but I can't see any message output.

Here is what I did.

1. I used uart_rw_multibyte_fifo_poll example from the mspm0_sdk_1_10_01_05 SDK for this test.

2. Ther is no heap size setting option (project settings > linker > basic options)

3. I added following code in the uart_rw_multibyte_fifo_poll.c to increase heap size.

     char __heap_buf[1024] __attribute__ ((section (".heap")));

4. I checked the __heap_start__ and __heap_end__ values in the map file to make sure this was applied correctly.

      0x200008d0                __heap_start__ = .

      0x20000cd0                __heap_end__ = .

      It is applied correctly.

5. This is my main() function.

    #include <stdio.h>

    char __heap_buf[1024] __attribute__ ((section (".heap")));

    int main(void)

    {

        printf ("hello world\r\n");

    }

Thank you.

Hi Sungwoo,

Sorry, I didn't realize you were using GNU.  Let me check with our SW GURUs for an answer.