www.megadrum.info

So I have my megadrum built as per the schematics given on the site. I am using an ATMega324p with the 20100516 firmware installed. I get what appears to be proper response on the megadrum display, the LED goes on whenever I hit a drum, and using an oscilloscope, there is signal happening at the output when I hit a drum, however, neither my DAW, nor MIDI-Ox, nor my Alesis SR-16 is responding to it. I have tried to get the current Megadrum manager to talk to it as well. I keep getting Midi Init Errors and Sysex timeouts although the megadrum LED goes on whenever I try to Get/Send something to it.

I checked, and re-checked, and checked again my connections, and can find nothing wrong.

Is there something else I can do at this point?
Does/should my configuration work? (does the 20100516 firmware work with megadrum manager for example)
Should I re-flash the ATMega firmware?

I feel like I am REALLY close, but I am stuck. Any help is appreciated.

Andrew

MegaDrum Manager will work only with latest firmware versions.
From your description I can only guess that you use the standard MIDI Out port so my guess is that either crystal frequency is incorrect or it doesn't match the firmware frequency or your atmega has fuses incorrectly programmed.

Thanks Dmitri for the suggestions, however, that didn't seem to change anything. I re-flashed the chip, and changed out the crystal (which is 20Mhz) and there was no difference. Can you think of anything else that would cause signal output, and response on the LCD display, but no actual midi activity? I did verify the Midi connector pins too, but there is nothing out of both the Midi and usb outputs. Is there another tool besides MidiOx that could help me troubleshoot?

The only other reason I can think of is shorts/breaks on the board for the MIDI Out signal. If not that, then it is only mismatch of crystal and firmware frequency or incorrect fuses.

Hmm ok. Can you point me to the correct fuses so I can check it again? I am using an atmega32.

Thx.

Thx ignoTus . That is definitely not what I had set. I also noticed that my auto correct changed my chip number on me and I didn't notice.

I'm actually running an atmega324p. Does that change anything?

Hmm, it's probably different... I don't have the configuration for that chip. All I can suggest is that Dmitri tell you or maybe you can find it digging though the forum, it might be in there somewhere.

See http://www.megadrum.info/forums/viewtopic.php?f=3&t=622
Obviously, you will not need BOOTRST and BootLock11 fuses programmed.

Dmitri,

What is the software that you have a screen shot of there?

Thx