Power Optimized FreeRTOS? Any examples?

[Dave_couling]

Are any of the freeRTOS examples Power Optimized? I've looked into other related posts but not sure anyone is seeing the same issues I'm seeing. I'm using a Rigado BMD300 and I can't get it to not draw upwards of 1~2mA at idle.

I've added the FPU code and DCDC in the main loop before the intern_softdevice_events_execute(); function call: static void power_manage(void) { __set_FPSCR(__get_FPSCR() & ~(FPU_EXCEPTION_MASK)); (void) __get_FPSCR(); NVIC_ClearPendingIRQ(FPU_IRQn);

uint32_t err_code = sd_app_evt_wait();
APP_ERROR_CHECK(err_code);

nrf_pwr_mgmt_run();

}

During 20msec advertising the radio consumes ~2.75mA During 5sec advertising the radio consumes ~1.85mA

I believe the CPU is not shutting down however I cannot track down why. Is it possible the freeRTOS threading is keeping the CPU on? Either the xTimer thread or the Idle Thread? How would I address this?

[RK]

have you now decided that this is the SAADC keeping the clock running as per your next question and has nothing to do with FreeRTOS?

[Dave_couling]

I'm 90% sure its a SAADC issue.

[Susheel Nuguru]

I cannot see either how FreeRTOS has to affect this. As soon as the CPU wakes up, make it to log the values of NVIC->ISPR[0] and NVIC->ISPR[1]. Hopefully they can show what is keeping the CPU up if you exclude softdevice reserved interrupt bits.

[RK]

@Aryan - Dave posted a day or so later saying he thinks it the SAADC so I think he also mostly believe it's not FreeRTOS