Another processor with NRF52

[Raja]

I have created a program on Arduino which does audio/video output and takes input from accelerometer and camera module. I was able to move accelerometer code to NRF52 with @martinbl e.g.

On other posts it was mentioned with softdevice running we might get problem with audio output. Also i was not able to create any e.g. with audio/video on NF52.

Now i was thinking of having another chip like avr or arm processor which can take commands from NRF52 via rx/tx and run audio/video etc. By this Nrf52 will only be responsible for BLE connection and other chip for processing commands.

Am i completely wrong or is this right way? If i am right can you please recommend any chip which is used commonly with NRF52 and is rx/tx best way to communicate with primary nrf52 chip?

Thanks

[Raja]

So @endnode / @MartinBL i am planning to add a atmel processor to my custom board along with nRF52. I want to control when this processor is ON/OFF. Can i connect the vin for atmel (arduino based atmega328) to one one the digital pins on nrf52 and control its ON/OFF like we do for LED? Is it bad practice or we can do it like this.

Set pin: nrf_gpio_cfg_output(PIN_num);

Control ON by: nrf_gpio_pin_set(PIN_num);

Control OFF by: nrf_gpio_pin_clear(PIN_num);

[MartinBL]

I would say that in general that is bad practice. There is a limit to how much current the nRF52's GPIOs can supply, and I suppose that the digital logic in the atmega can induce some noise back into the nRF52. I would rather suggest that you use some sort of mosfet to control the power supply to the atmega with a GPIO.