LPC55S69 : fsl_tickless_rtc

EugeneHiihtaja — Wed, 27 Nov 2019 13:34:46 GMT

Hello !

I can see rtos tickless example has implementation of

void vPortSuppressTicksAndSleep(TickType_t xExpectedIdleTime)

but it never ever is called becouse definition like this is missing:

/* Tickless idle/low power functionality. */
#ifndef portSUPPRESS_TICKS_AND_SLEEP
extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
#define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
#endif

Could you please verify that example and confirm if tthat new RTOS port can be used in teckless mode ?

Thank you !

Regards,

Eugene

Re: LPC55S69 : fsl_tickless_rtc

FelipeGarcia — Tue, 03 Dec 2019 19:01:16 GMT

Hi Eugene,

You are correct, If the FreeRTOS port in use does not provide a default implementation of portSUPPRESS_TICKS_AND_SLEEP(), then the application writer can provide their own implementation by defining portSUPPRESS_TICKS_AND_SLEEP() in FreeRTOSConfig.h.

Please check the below link for more information.

https://www.freertos.org/low-power-tickless-rtos.html

Also check the following thread that can give you more hints regarding this implementation.

Board low power modes, alongside Tickless FreeRTOS

Best regards,

Felipe

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