testing midibox64 core with one pot

Testing/Troubleshooting
1

Hi,

I’m building a midibox64 and i’ve finished the core module. Measured voltages and everything is OK, programmed the PIC with the 0.034b firmware.

I wondered if i’m able to do a quick test with one pot connected to A0 of J5, A1-7 connected to ground (thus without needing to connect an AIN module)?

Do i need to connect anything else? Other ways to quickly test?

Sorry if this sounds like a super newbie question, 'cos i am!  ;D

thanks in advance!

2

I don’t think so…

You have to make the ainx4 and connect it to the core

Only then you can connect 1 pot and connect to ground all  other 7 individual inputs…

3

You can also check it without an AINX4 module - the MIDIbox64 will send 8 values at the same time due to the missing multiplexer, but for testing purposes this is ok - your schematic is correct.

Best Regards, Thorsten.

4

Thanks!

I wanted to verify this because i wasn’t getting *any* MIDI output at all.

The problem seems to be my PIC programmer… Although i get a programmed & verified OK (verify during and after switched on) - if i read the PIC i get nothing but zeros…   ???