freertos RTC issue in port_cmsis_systick.c

RE: freertos RTC issue in port_cmsis_systick.c

Susheel Nuguru — Fri, 09 Feb 2018 10:49:53 GMT

fixed in SDK14.

RE: freertos RTC issue in port_cmsis_systick.c

genis — Wed, 31 Jan 2018 13:51:05 GMT

Fixed on SDK12.2.0. Thank you, good work!

RE: freertos RTC issue in port_cmsis_systick.c

Susheel Nuguru — Wed, 01 Nov 2017 12:13:01 GMT

this should be fixed in SDK 14 for nrf%2 files and SDK12.3 has patches for nRF51 files.

RE: freertos RTC issue in port_cmsis_systick.c

max — Thu, 14 Sep 2017 12:51:48 GMT

What about nrf51? Do you have a port_cmsis_systick.c file?

RE: freertos RTC issue in port_cmsis_systick.c

Justin — Thu, 03 Aug 2017 22:03:24 GMT

Is this fixed in the latest SDK14.0 ?

RE: freertos RTC issue in port_cmsis_systick.c

Jason — Mon, 24 Jul 2017 02:37:48 GMT

This issue is still not fixed in the sdk 13.1.0, and it worked by replacing the file port_cmsis_systick.c

RE: freertos RTC issue in port_cmsis_systick.c

sonja — Wed, 05 Jul 2017 09:13:11 GMT

Yes it works now. Thank you very much!

RE: freertos RTC issue in port_cmsis_systick.c

Srikar — Tue, 02 May 2017 10:58:19 GMT

Thank you for Fix. Tested for last 15 minutes ,Device is working as expected .

RE: freertos RTC issue in port_cmsis_systick.c

Susheel Nuguru — Tue, 02 May 2017 10:29:54 GMT

We found a corner case which could make the FreeRTOS tick go ahead of RTC tick.

Please find the attached file and replace this

port_cmsis_systick.c with the file SDK\external\freertos\portable\CMSIS\nrf52\port_cmsis_systick.c

For those who are using older SDK, they will get a missing define error with this new file, in that case you need to add the below to FreeRTOSConfig.h file

/** Implementation note:  Use this with caution and set this to 1 ONLY for debugging  *
----------------------------------------------------------
     * Set the value of configUSE_DISABLE_TICK_AUTO_CORRECTION_DEBUG to below for enabling or disabling RTOS tick auto correction:
     * 0. This is default. If the RTC tick interrupt is masked for more than 1 tick by higher priority interrupts, then most likely
     *    one or more RTC ticks are lost. The tick interrupt inside RTOS will detect this and make a correction needed. This is needed
     *    for the RTOS internal timers to be more accurate.
     * 1. The auto correction for RTOS tick is disabled even though few RTC tick interrupts were lost. This feature is desirable when debugging
     *    the RTOS application and stepping though the code. After stepping when the application is continued in debug mode, the auto-corrections of
     *    RTOS tick might cause asserts. Setting configUSE_DISABLE_TICK_AUTO_CORRECTION_DEBUG to 1 will make RTC and RTOS go out of sync but could be
     *    convenient for debugging.
     */
#define configUSE_DISABLE_TICK_AUTO_CORRECTION_DEBUG 0

Let me know if this helps

/Susheel