drumwide Posted July 8, 2003 Report Share Posted July 8, 2003 I am using a PIC18f452I/P with bootstrap loader v1.1 verified.when i turn on the core the lcd backlight comes on but it doesn't send the sysex request for mios.Nothing displayed on lcd, but if i turn contrast up I get black boxes. I need to know what to do to get mios loaded. Quote Link to comment Share on other sites More sharing options...
Sephult Posted July 8, 2003 Report Share Posted July 8, 2003 When the bootstrap is only loaded you will see the black squares on your LCD.Do this first1.)You need to verify the bootstrap loader is burned right.2.)You need to check your wiring on the midi circuit.3.)Test your midi ports by attaching the input to the output and use send/receive sysex for transfer. When finished go to the sysex view and compare the two windows. If they match you are fine with the computer.Then if it doesn't work ask me again and I'll help you through it.-Sephult Quote Link to comment Share on other sites More sharing options...
Sephult Posted July 8, 2003 Report Share Posted July 8, 2003 Is it the bootstrap loader v1_1b?I heard something about the last version not starting up. Quote Link to comment Share on other sites More sharing options...
drumwide Posted July 9, 2003 Author Report Share Posted July 9, 2003 yes it is v.1.1b.thank you I will check my wiring as you said.can you point me to a fix for the v_1.1b not starting? Quote Link to comment Share on other sites More sharing options...
pay_c Posted July 9, 2003 Report Share Posted July 9, 2003 It should come up. No idea why it should not. :-/ Quote Link to comment Share on other sites More sharing options...
Sephult Posted July 9, 2003 Report Share Posted July 9, 2003 Yeah v1_1b does work. There is no need for a fix.I have only heard of problems with v1_1 of the bootstrap loader.Have you checked your voltage levels? Make sure you have a stable 5v, with all pin connections verified as being hooked up correctly. If that doesn't work, there might be a problem in the midi end. I would initially disconnect the LCD screen from the board until you have found the problem. I have found this to be very helpful :) when doing troubleshooting.I have just had a dilemma with a constant reboot problem, and Thorsten had directed me to disconnect D7 and the 5v at pin 2 (contrast connection). It corrected my problem.I would say for the sake of troubleshooting to do so, to make shure that nothing is shorting out through the LCD connections. There is only a small amount of things it could be.1.) Power requirements not stable2.) Midi circuit is failing3.) Either the LCD or I/O connections are shorted. You could also pull up/down I/O's, and minimalize the circuit, to make sure there's not a short. What settings are you using in MIDI-OX (if thats what your using)? Well thats about all the advice I can give today!-Good Luck--Sephult Quote Link to comment Share on other sites More sharing options...
drumwide Posted July 9, 2003 Author Report Share Posted July 9, 2003 sephult thanks for your help I have since found the problem to be in the jdm programmer. Quote Link to comment Share on other sites More sharing options...
Sephult Posted July 9, 2003 Report Share Posted July 9, 2003 Awesome-At least it didn't take much time, I was thinking it was the burn also.Have fun!;)-Sephult Quote Link to comment Share on other sites More sharing options...
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