Windows doesn't detect megadrum

[alchemicus]

Thank you very much dmitri, tomorrow i will try all your tips.
I hope nothing is hardware damaged.
Yes, USB is soldered on pcb input board, i will try to buy another one and install directly on the synthex pcb...

[dmitri]

Yes, USB is soldered on pcb input board, i will try to buy another one and install directly on the synthex pcb...

It's not necessary, just make USB wires between the MegaDrum board and and the input board as short as possible and try suggestions from my previous post.

[alchemicus]

i'm tring to check contiunuity between pins and i saw a strange things.
When i point on pin 15 (or 16) to the fourth pin of usb i have a big value of continuity.is it normal (my multimeter show 600) if u want i shot a picture.

[dmitri]

Look at this: http://pinouts.ru/Slots/USB_pinout.shtml
There should be continuity (close to 0 Ohm) between:
1. GND on the board and pin 4 of the USB cable at the PC end.
2. Vcc on the board and pin 1 of the USB cable at the PC end.
3. pin 15 of PIC18F2550 and pin 2 of the USB cable at the PC end.
4. pin 16 of PIC18F2550 and pin 3 of the USB cable at the PC end.

It seems like you measure resistance between pin 15 (or 16) of PIC18F2550 and the ground. I'm guessing that since semiconductors are involved in this case, different multimeters will show different resistances.

[alchemicus]

while i wait a new USB socket to solder i power up my MD with a power supply.
All is OK I can browse menu and my input jackboard workin fine....but i have the same problem i had with USB...no midi Exit from Midi out...i rechecked all wiring and all seems to be ok....i am so sad because all work but on midi OXO and cubase i have not MIDI ACTIVITY....what step i must go to discover problem?

[dmitri]

while i wait a new USB socket to solder i power up my MD with a power supply.
All is OK I can browse menu and my input jackboard workin fine....but i have the same problem i had with USB...no midi Exit from Midi out...i rechecked all wiring and all seems to be ok....i am so sad because all work but on midi OXO and cubase i have not MIDI ACTIVITY....what step i must go to discover problem?

Any of listed below will have produce the problem you have:

1. You wired the MIDI Out socket incorrectly.
2. MegaDrum firmware version doesn't match Atmega's crystal.
3. Broken connection between pin 15 of Atmega and the MIDI Out socket.
4. Pin 15 on Atmega is faulty
5. MIDI In on a PC is faulty
6. MIDI cable is faulty
7. Incorrect MIDI In port selected in MIDI-OX/Cubase

[alchemicus]

this morning i tried something else.
tried to connect again via midi in cubase and something appear.
recording a midi track and hitting mi kick drum, sometimes megadrum sends Aftertouch or Pitch bend signal.....but it'sd really rare....i cheched again all cable and wiring and all seems to be OK....i think it's something wrong with atmega...

[dmitri]

You definitely have a mismatch between Atmega crystal frequency and MegaDrum firmware version frequency.

[alchemicus]

and what i can do? i used 16 mhz

[dmitri]

:o and what i can do? i used 16 mhz

Load a 16MHz MegaDrum firmware version.