RTOS/TMS320F28377S: Maximum Semaphore count

Dominik Lorenz

Part Number: TMS320F28377S

Tool/software: TI-RTOS

Hello,

I recently spent some time debugging and wanted to share my experience with you:

I had a programm that consisted of several tasks. For testing, i wanted to test the sytem without a specific component, so i commented the corresponding code in a task out. After that, i experienced program errors (running into void abort()) after some time. Turned out that i posted ab semaphore more than 0xFFFF times without pending it, which caused the error. I don't know if this is a wanted behaviour, as i didn't find a maximum count in the documentation.

Greetings,

Dominik

over 7 years ago

0 Ashish Kapania over 7 years ago

TI__Mastermind 21645 points

Hi Dominik,

The Semaphore object has a 16-bit counter which supports a maximum count of 65535. This is documented in the Semaphore module cdoc (see link below). We also have an assert to catch this which is probably what you saw ?

software-dl.ti.com/.../Semaphore.html

Best,
Ashish

0 Dominik Lorenz over 7 years ago in reply to Ashish Kapania

Intellectual 255 points

You're perfectly right, it stands right there! I looked at the documentation of Semaphore_getCount from my code composer studio and it looked exactly like in the link you sent me. But under "Detail", my version only contains the first sentence of the version you sent me.

Greetings,

Dominik

0 Ashish Kapania over 7 years ago in reply to Dominik Lorenz

TI__Mastermind 21645 points

Hi Dominik,

We updated the Semaphore count cdoc earlier this year so its only present in the recent versions of SYS/BIOS. Sorry for not clarifying that earlier.

Best,

Ashish

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RTOS/TMS320F28377S: Maximum Semaphore count