How to use two ADC parallely with interrupts? Should I use; RTC, Timer or PPI for the same? How to add timestamps for the parallel ADC readings.

[vin_h]

I am a begineer in Nordic trying to read voltage and current readings from ADC pin. I need to read both values in parallel, with known interval. So I need to use interrupts and add timestamps for current and voltage readings. I had tried combining SPI, I2C and ADC for a try; but unable to achieve paralle reading with timestamps. I failed to identify the prcedure to do the same. Should I use RTC, Timer or PPI? Also how to get current time with compensating overflow.?

[awneil]

vin_h said:

I am a begineer in Nordic

Is that just a beginner with Nordic, or a beginner with microcontrollers in general?

Or a beginner with any form of programming?

For Nordic, start here:

https://www.nordicsemi.com/Get-Started

Have you looked at the nRF52832 Prodcut Specification?

It shows you that there is only one ADC;  so you cannot read multiple source simultaneously - it will always have to do them sequentially.

The ADC example in the SDK illustrates reading several channels. 

See also:  https://devzone.nordicsemi.com/f/nordic-q-a/45263/saadc-multiple-channel-acquisition

And: https://devzone.nordicsemi.com/f/nordic-q-a/23867/nrf52-best-practise-for-ultra-low-power-saadc-4-channel-conversion

vin_h said:

I had tried combining SPI, I2C and ADC for a try;

How would that help?

[vin_h]

I am a beginner in Nordic. To learn; I was trying to combine serial protocols with ADC and it seems to be working fine without any errors. But I failed to add time stamps and create interrupts for ADC readings. Thank you for guiding me to the documents and clearing my doubts is mutliple ADC readings. i understood that, the ADC readings are virtually simultaneous; pseudo- simultaneous. So, I hope i will be able to create interrups and add timestamps to the acquired data. Thank you for your support.