TMS320F28379D: How to enable floating-point value print?

Mukesh Ghosh

Hello Everyone,

I am trying to write down a float value to SDCard but I found that %f is not supported. I read some old forum questions where some people suggest editing system configuration file like this way "System.extendedFormats = "%$L%$S%$F set in .cfg file". But in my project, I don't have any system configuration file. I am developing my code under the "sd_card_cpu01" project which is provided from TI for SD card reading. Can anyone help me how can I enable this %f format or where I have to write "System.extendedFormats = "%$L%$S%$F". Thanks in advance.

float value = 3.1416;

for(b=0; b<9; b++)
{
k += sprintf(str+k , "%.4f\t", value);
}

Kind regards

Mukesh Ghosh

over 4 years ago

0 Chester Gillon over 4 years ago

Guru 92251 points

Mukesh Ghosh said:
I am developing my code under the "sd_card_cpu01" project which is provided from TI for SD card reading.

When using the sprintf() function from the TI compiler run time library it is the --printf_support option which controls if there is floating point support in the printf functions.

TMS320C28x Optimizing C/C++ Compiler v21.6.0.LTS User's Guide (Rev. W) shows that full is the default:

Where the option can be selected in the CCS project properties:

You also need to ensure there is sufficient Stack Size and Heap Size

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TMS320F28379D: How to enable floating-point value print?