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Connected LaunchPad SensorHub IoT bug

Dan K
Expert 1210 points

In examining the source code for the senshub_iot to port the qs-iot example application for the EK-TM4C1294XL Connected LaunchPad to use FreeRTOS, I observed an issue with code in the senshub_iot's cloud_task.c file in which a semaphore is taken with a non-0 block time specified.

See Line 1133 in: TivaWare\examples\boards\ek-tm4c1294xl-boostxl-senshub\senshub_iot\cloud_task.c

The FreeRTOS website specifically states that "It is therefore essential that timer callback functions never attempt to block."

See: FreeRTOS Software Timers: Important information on writing timer callback functions

  • TI__Genius 17225 points

    Thanks for the catch.  You are correct this is an oversight on our part.

    The simplest solution is probably to remove portMAX_DELAY as the final parameter to xQueueSendToBack and replace it with zero.  Then optionally catch the case where the send fails and either re-try or send an error message to the console.

    I will file a bug report and this should get fixed for the next TivaWare release. 

    Dexter

  • in reply to Stellaris Dexter
    Prodigy 195 points

    I will file a bug report and this should get fixed for the next TivaWare release.

    Do you know if this has been fixed yet?

    Thanks.