Simple output to stderr causes hang.

Itay Chamiel

Hi,

I'm using a C6678 EVM with CGtools 7.4.2 with Code Composer 5.3. My example code consists of the following simple line:

fprintf(stderr, "%d\n", 1);

When running this code via JTAG it runs with no problem, and the text "1" is output to the console. However when using Free Run (or disabling the "Enable CIO function use" option) this line will loop forever in RTS code. This does not happen when outputting to stdout.

Thanks,

-itay

over 12 years ago

0 Archaeologist over 12 years ago

TI__Guru* 84285 points

Calling fprintf with CIO disabled is not supported. Unpredictable things could happen, including but not limited to an infinite loop in fprintf or data corruption elsewhere in the program.

0 Itay Chamiel over 12 years ago in reply to Archaeologist

Intellectual 940 points

This is ridiculous. What it implies is that fprintf can't be used in production code, because production code isn't booted through JTAG (and therefore runs in the same conditions as when CIO is disabled). Is this documented anywhere?

0 George Mock over 12 years ago in reply to Itay Chamiel

TI__Guru**** 252710 points

Itay Chamiel said:
Is this documented anywhere?

Please see the section titled The C I/O Functions in the C6000 compiler manual.

Thanks and regards,

-George

Code Composer Studio™︎

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Simple output to stderr causes hang.