Hi, I'm using the nRF52840 Preview DK to get data from a digital microphone via a PDM interface.
I'm using a clock frequency on 1.032 MHz to activate the microphone.
The data received on the data_in pin seems to be alright.
I have been using this PDM-interface: http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52840.ps%2Fpdm.html
Here is my problem:
It seems like the interface includes a decimation filter to produce a PCM-output. By default the PCM-output is sent to the RAM via the EasyDMA. I want to send this PCM data to an external GSM-module that has a PCM-input, so the data recorded by the microphone will be played by its speaker.
Is there any way to access this PCM-output on the nRF52840?
Am I able to connect the PCM-output to a GPIO?
Regards,
Morten
