SEVONPEND setting - how to?

[Wojtek]

If my way of thinking is not wrong, I have to set SEVONPEND flag to wake up cpu from sd_app_evt_wait on pended event. How to set this flag? I cannot find any function/macro to do this - I don't want to mess up other flags that are stored in that register.

I want my application to wake up (only wakeup, no execution of IRQ handler) when ADC finishes sampling.

[Wojtek]

Ok, that question was a bit silly.

uint32_t scr_sevonpend = 1;
SCB->SCR = ((uint32_t)scr_sevonpend << SCB_SCR_SEVONPEND_Pos) & SCB_SCR_SEVONPEND_Msk;

[Wojtek]

I will decribe You what I want to achieve, and what I am doing:

• I want my adc to sample 2 channels in 3ms (1chan, 2chan, 3ms delay... ,1chan, 2chan, 3ms delay....)

• I want this operations to be non-blocking, because sometimes I have to handle connection with high data throughput

• I want to sleep as much as possible.

What i do is:

• periodically call 3ms timer - this timer sets adc input as channel1, start adc, and app goes to sleep

• wakeup from power_manage when adc finishes sampling - change sampling channel to 2, start adc - go to sleep

• wakeup again, sample channel2, no more adc operation - waiting for 3ms timer call again, sleeping

I am setting SCR once, before starting all that operations. I propably could use normal ADC IRQ handlers to achieve this - I'll do some power consumption tests later to check which solution is better.

I also use: nrf_adc_int_enable(0x01); and sd_nvic_ClearPendingIRQ(ADC_IRQn); I am not sure right now which are really necessary as I DONT call sd_nvic_EnableIRQ(ADC)