Printf support for TMS570 Code Composer Studio

Dennis Gajudo

Intellectual 365 points

Other Parts Discussed in Thread: TMS570LS20216

Hi All,

How do I enable "printf" support for TMS570 Code Composer Studio?

- Tried the procedure indicated at

http://processors.wiki.ti.com/index.php/Printf_support_for_MSP430_CCSTUDIO_compiler

- Then, I modified the default linker command file (sys_link.cmd) by adding

.sysmem : {} > RAM

in Section Configuration

but still nothing was printed to the Debug Console when I ran the program.

I'm using TMS570LS20216 USB Kit with Code Composer Studio 4.2.4.00033 with the ff. setup

Code Generation Tool: TI v4.6.6

Runtime Support Library: rtsv7R4_T_be_v3D16_eabi.lib

Regards,

Dennis

over 13 years ago

0 Dennis Gajudo over 13 years ago

Intellectual 365 points

Hi All,

I managed to display the "Hello World" message in the console window when I used the

printf("Hello World\n");

, but when I removed the "\n" character in the code:

printf("Hello World");

nothing is displayed in the console window.

What's the reason for such behaviour?

0 Diwakar Bansal over 13 years ago in reply to Dennis Gajudo

TI__Intellectual 1325 points

Hello Dennis,

A couple of comments:

1) We confirmed your observation. Also, if you have multiple printf statements and one with "\n", the previous strings are also printed out.

2) I am not sure why console behaves like this; hence will forward your question to the CCS experts, who can elaborate on this.

Regards,
Diwakar

0 Ki over 13 years ago in reply to Diwakar Bansal

TI__Guru**** 464031 points

Hello,

Output will be sent to the console when the buffer gets flushed. \n will flush the buffer. Otherwise I believe it will trigger when the buffer is full or when the program exits.

Thanks

0 Ki over 13 years ago in reply to Ki

TI__Guru**** 464031 points

Ki-Soo Lee said:
Output will be sent to the console when the buffer gets flushed. \n will flush the buffer. Otherwise I believe it will trigger when the buffer is full or when the program exits.

More info on this:

http://processors.wiki.ti.com/index.php/Tips_for_using_printf#Flushing

0 Dem Devlin over 12 years ago in reply to Diwakar Bansal

Prodigy 60 points

Hi Diwakar,

I'm a user of TMS570LS04X board. I want to use printf function in my ccs project.. But it really can't work. Here is my project,please give me some advices.Thank you!!

void main(void)
{
/* USER CODE BEGIN (3) */
   uint16_t value;
   uint16_t i = 0;
   //char buffersize[512];
   gioInit();
   hetInit();

   add_device("dbgu", _SSA,
           DBGU_open, DBGU_close,
           DBGU_read, DBGU_write,
           DBGU_lseek, DBGU_unlink, DBGU_rename);
   fopen("dbgu","w");
   freopen("dbgu:", "w", stdout);
   setvbuf(stdout, NULL, _IONBF, 0);

It goto error when run setvbuf(stdout, NULL, _IONBF, 0);

The full project is 6874.TMS570LS04x_KEY_SERAIL.rar

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Printf support for TMS570 Code Composer Studio