CC1310: Semaphore_pend does not release the task even when pended with finite timeout

Chan100

Part Number: CC1310

Hi Everyone,

I am working with empty example from simplelink sdk v3.20. I am using Semaphores and interrupts in my program. I configure a pin to detect a neg edge and post a semaphore a sub-routine. The Semaphore_pend is put in a called function from mainThread as following,

#define TICKS_PER_SECOND (uint32_t)(1000000/Clock_tickPeriod)
#define SEMAPHORE_WAIT_IN_SEC (uint32_t)(5*TICKS_PER_SECOND)

Semaphore_pend(semHandle,SEMAPHORE_WAIT_IN_SEC);

However I see that the task is not unblocked within five seconds. To verify this, I put UART_write statements above and below the 'Semaphore_pend' and I do not see the print after the statement.

I also verified that all the handles are not NULL (UART,InterruptHandle,Semaphore etc.,)

Can someone suggest why this might be happening?

Thanks in advance,

-Chandrasekhar DVS

over 5 years ago

0 Severin Suveren over 5 years ago

TI__Mastermind 23730 points

Hi Chandrasekhar,

I've assigned your post to an expert to help you with your question.

0 IUsedToBeARealPerson (M-W) over 5 years ago in reply to Severin Suveren

TI__Guru 58425 points

Hi C,

I ran an example myself using your defines, I see no issue in the blocking time. Could you share the full example you run so that I can see if there is something going on that could impact this on your side?

0 Chan100 over 5 years ago in reply to IUsedToBeARealPerson (M-W)

Genius 3040 points

Hi M-W,

I am using a custom board based on CC1310 and also was using batteries instead of DC power supply. I do not see the project having issues(after replacing custom board CC1310_LAUNCHXL.h and CC1310_LAUNCHXL.c files with LAUNCHXL-CC1310 files) on the LAUNCHXL-CC1310. But I did observe that when I give the power to the custom board from 3v3 and GND of LAUNCHXL, there is no blocking issue with Semaphore.

Could you tell me why is that?

Thanks in advance,

-Chandrasekhar DVS

0 IUsedToBeARealPerson (M-W) over 5 years ago in reply to Chan100

TI__Guru 58425 points

Hi C,

I can't give you a perfect answer to why that might be, but it sounds like you could have some power issue on the board if using external power solves the issue for you. What type of battery are you using?

0 Chan100 over 5 years ago in reply to IUsedToBeARealPerson (M-W)

Genius 3040 points

Hi M-W,

I am using Zinc Carbon batteries, Size- AA, Type-R6 and Volt -1.50

-Chandrasekhar DVS

0 IUsedToBeARealPerson (M-W) over 5 years ago in reply to Chan100

TI__Guru 58425 points

Hi C,

I suggest you try alternative ways of powering your board to see if you can see what is going on. Scoping the power lines when going in and out of standby might also be helpful to see if there is any unexpected dips when running on battery.

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CC1310: Semaphore_pend does not release the task even when pended with finite timeout