Radio Test Example using SeggerRTT?

[anasimtiaz]

Hi,

I have to prepare my devices for certification and I am hoping to use the radio test example as suggest by most people here on the devzone to be the most convenient way of setting up the devices for continuous transmission in single frequency mode. However, not having any accessible pins on the samples, I was wondering if it is possible to use the programming interface, instead of the UART, to send commands over to the DUT?

In response to the question here: https://devzone.nordicsemi.com/f/nordic-q-a/16142/production-rf-test/61578#61578 It has been pointed out that is is possible:

Note that if you don't have UART interface you can also use the SWD interface (the programming interface) and use SeggerRTT to send command or receive data.

So can someone please point me in the direction of how to go about this, if possible?

[twihtronics]

maybe looking at the CLI examples might be a start. Not sure though but basically you would need to modify the standard radio test firmware to now read and write commands from the RTT channel instead of uart. You probably can just use CLI as a bases and slim it down. Also look at receiving data from RTT channel. That would be much simpler than implementing a full CLI. You just need to read and write from RTT.

[twihtronics]

if you look at segger_rtt.h you will notice there is a SEGGER_RTT_Read function. So you probably don't need a full blown CLI just use SEGGER_RTT_Read and SEGGER_RTT_Write functions and keep it simple