Help needed with MF_NG

MIDIbox NG
1

Hey people,

I have a problem  and I hope you can help me.

I’ve created a PCB based on MF_NG. Schematic and layout see here:

mfPCB.png.cbd0c5ed583d47be1e6f8407f4d6c6bc.png
mfPCB.png.cbd0c5ed583d47be1e6f8407f4d6c6bc.png4766×1566 170 KB

mfschematic.png.1d6c8608ab5bb6d7de5677da08821568.png
mfschematic.png.1d6c8608ab5bb6d7de5677da08821568.png4644×2606 142 KB

I have a PicKit3 to program the 18F4520. I use the MBLAP X to flash the bootstrap to the PIC. The programming seems to work fine. I don’t get any error messages. 

As stated on the MIOS Troubleshooting page there seems to be a problem with the ID when working with MBLAP. See here (bottom):
http://ucapps.de/howto_debug_midi.html

So I also flashed the bootstrap-workaround which also ran fine.

If I now connect the MF_NG via MIDI to a core, I get this error message:
 

[395386.494] [MIOS32\_MIDI\_Receive\_Handler] Timeout on port 0x20

Do you know what that could cause?!

Best,
Chris

2

I’ve just noticed, I’ve used the PIC18F4520 instead of PIC18F452. Could that be the problem?

3

Hello

 

19 hours ago, FantomXR said:

I’ve just noticed, I’ve used the PIC18F4520 instead of PIC18F452. Could that be the problem?

 

Not expert at all for the question, but I find this:

http://ww1.microchip.com/downloads/en/DeviceDoc/39647a.pdf

I suspect it deserve a read

Best

Zam

4

Quote

I’ve just noticed, I’ve used the PIC18F4520 instead of PIC18F452. Could that be the problem?

I built a Midibox Midi Monitor a while ago and I used a 18F452 as per shematic, the bootloader flashed no problem.

http://ucapps.de/mbhp/mbhp_core_v3.pdf

I did get the wrong PIC at first a 18F4520, not 18F452

5

Thanks! I’ll order a 452 and try again…

Thanks,
Chris

6

It works great with the correct PIC18F452 :wink: