Portsdown 4 modification request

[g4saq]

A couple of years ago I requested that PD4/ Langstone should be altered so that a GPIO pin was set high when Langstone was selected and low when PD4 was selected. I wanted to operate a relay which would route the receive chain to either the Pluto (for Langstone) or MiniTiouner (for PD4), as required.

I can’t remember whether the requested mod was already in place or whether work was done to include it! Anyway, I was advised to use GPIO 21 and to set the Langstone Rx bandbits 7 (for each band) to activate the relay. This solution has worked very well indeed, providing the automatic selection that I required.

My present request is that the code should be modified to set GPIO 21 high when Band Viewer is selected and to set GPIO 21 low again when Band Viewer exits. This will automatically switch my relay and route the Rx chain to the Pluto Rx port, as required for this valuable function. (This will need to be done for both of the Band Viewer options).

Very many thanks & 73.
Russ, G4SAQ.