dondo

Hi Doug, I'm from Rome. I would like to have 8 SSM2044 chips if you still have some left. May be it's too late, however thanks in advance. Dondo (hplus79_atsignhere_gmail_dothere_com)

UPDATE: on another board I fixed a bad solder, and now the optocoupler test is OK. I was able to load MIOS (the upload request was being sent prior to loading it), but when I restarted the core nothing happened, and the display still shown the 2nd row dark. what's wrong now?

Nothing can be uploaded into my core module.... there is no way.... I have tried with mios in 3 ways 1) waiting for an upload request (that never arrive) 2) smart mode without results 3) manual mode (with this one i get upload succeded but i don't see changes neither to the display)

I mean making this test ( http://www.ucapps.de/howtodebug/mbhp_core_extract_measuring_gnd.gif ) I got 4.98V in every ground point

This is my experience with the midi troubleshooting page * TEST PROG1: my pic is burned sucessfully * TEST CORE1: I have the A10.000 FD3u4 crystal on my board * TEST CORE3: there aren't missed junctions or bad solderings * TEST CORE4: I have 4.98V in all the Vdds (except fot TX pin of the pic that oscillate from 3.66V to 4.98V) * TEST CORE5: I have 4.98V in all the grounds * TEST CORE6: The polarity of my MIDI plugs is OK * TEST CORE7: The polarity of the protection diode D1 is correct * TEST CORE8: My R8 and R7 are 220 Ohm 5% tollerance * TEST CORE9: The midi out of my core is connected to the midi in of my Edirol UM-2 midi device * TEST CORE10: I would like to have a lot of request messages connecting TX pin to RX pin, but I have nothing * TEST CORE11: I would like to have at least wrong sysex messages, but I have nothing * TEST OUT1: If I connect a LED to my MIDI Out port sometimes it turn on for 2 seconds (strange just sometimes) * TEST OUT2: I have tried to disconnect the middle pin of J12 (ground line of MIDI Out port) but without results What's wrong guys? :-\

Yes! I burn it myself! I burned it in gentoo linux system with the last wine because on xp I always have problems to use my programmer! It worked i think! the verify was successful. I did it with picpgm.

no. I haven't another one I have to buy it. Do you think I have cooked my optocoupler? Is it so easy to burn?

I just built the core module. I checked all the voltages I can. I mounted the pic18f4685 (programmed with the bootstrap loader with picpgm) and the 6n138 in their sockets. I have connected an LCD 16x2 to the core. I can see the first row light and the second row dark. If I check with the midi in monitor in mios studio i have no midi messages. (the problem is not my pc because i can read any other midi instrument.) If I test the voltage of the tx pin of the pic I can read 3.66V if I reset the core module sometimes I get 4.98V. while my rx pin it's always at 4.98V. If i connect a led to my midi out it never turn on! I have tried to follow the midi troubleshooting but without success What's wrong? ??? please help me!