HV Shield

This firmware demonstrates the HV Shield driver using one HV (High voltage) GPIO and HV DAC.

Flash and run

Build the firmware with:

west build -b ardep samples/hv_shield -DSHIELD=hv_shield

Flash it using dfu-util:

west ardep dfu

Expected behavior

The HV Shield puts out a slow sawtooth on AO36 and toggles D1