mgalper Posted April 13, 2007 Report Share Posted April 13, 2007 Dear collective wisdom,I finally got around building a core with smash tv´s core r4 and his pre-programmed PIC with bootstrap loader 1.2 and mios 1.9. I also have the latest mios studio build running.Instead of getting one message on power-on, I get the the following on midi in monitor:00000000953092 ms | Sysex message: F0 00 00 7E 40 00 01 F700000000953102 ms | Sysex message: F0 00 00 7E 40 00 01 F7every *milisecond* (almost) as you can see. I am not sure what this means. Do I not have mios installed? (But, in this case, should I not receive the upload request every two seconds instead of incredibly fast?)Anything on the circuit of the core?Any hints?Now, I still have LCD problems: it is esentially blank, but every once in a while I get weird images on it (a 2x16 character by winstar)Too many problems? :-[ Quote Link to comment Share on other sites More sharing options...
stryd_one Posted April 13, 2007 Report Share Posted April 13, 2007 I wonder if your midi routing is creating feedback? Quote Link to comment Share on other sites More sharing options...
dj3nk Posted April 13, 2007 Report Share Posted April 13, 2007 do you use midi ox and the merger is on ? Quote Link to comment Share on other sites More sharing options...
mgalper Posted April 14, 2007 Author Report Share Posted April 14, 2007 by feedback you mean that a device has in and out connected? (I am mainly using mios studio, but do get the same super fast message in midiox). Quote Link to comment Share on other sites More sharing options...
TK. Posted April 14, 2007 Report Share Posted April 14, 2007 Yes, it sounds like a feedback.What happens when you disconnect the cable on the MIDI In port, do you still get so many upload requests?Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
mgalper Posted April 20, 2007 Author Report Share Posted April 20, 2007 Ok. So, finally had the time to test properly. I feel like I am making advances. However:1- MIDI configurations were ok. But I'm still very confused. That's because in trying to deal with my LCD problems I noticed that moving the core's potentiometers (P1/P2) I changed the speed with which the upload request showed up in MIDI IN. I played with them until I got the messages at a interval of 2 seconds.2-After getting the upload message every 2 seconds I uploaded MIOS without error messages ;D. Following, I used sysEx box to upload the Midibox64E application. Again, no error was listed. ::)3-LCD, however, is still not working :P I am using a winstar 16x2. Model is listed as WH1602A. Cable was checked and the specifications speak of a "Built-In Controller HD44780 (Hitachi) or equivalent" Is it incompatible with MIDIBOX, somehow?Thanks for your always cogent replies!!! Quote Link to comment Share on other sites More sharing options...
stryd_one Posted April 21, 2007 Report Share Posted April 21, 2007 Sounds like your LCD is drawing too much current, and the PIC is starting and stopping over and over. When you turn those pots down, it allows enough current for the PIC to run. If that's the case, it's possible that you've shorted something on the screen. If you disconnect the backlight wiring completely, how does it go?I played with them until I got the messages at a interval of 2 seconds.Did it ever go longer than 4 or longer than 2? What effect did turning each of the pots have? Quote Link to comment Share on other sites More sharing options...
mgalper Posted April 21, 2007 Author Report Share Posted April 21, 2007 I tried disconnecting the backlight and it did change the scenario! I now have one upload request message :D. Voltage issues, as you rightly said. Still nothing on the LCD, though. I should be able to see characters, right? A "Ready" message as I could summon from my readings, right?Could it be that my LCD has an incompatible controller? I'm using a Winstar WH1602A 16x2 "Built-In Controller HD44780 (Hitachi) or equivalent" Quote Link to comment Share on other sites More sharing options...
mgalper Posted April 21, 2007 Author Report Share Posted April 21, 2007 I see now that I have what is described as a LCD type#0. Should have read more before asking about the controller.Anyway, still not working. Have tripled checked the wiring and I am almost 100% sure I have mios running on the PIC.Thanks for your HEEEEEELPPPPPP! Quote Link to comment Share on other sites More sharing options...
doc Posted April 21, 2007 Report Share Posted April 21, 2007 Your LCD should be ok.You wrote, it was ok when disconnecting the backlight. Ok so far.Did you turn the other port (contrast) so that you can see anything? (Without backlight of course).If you now get a "Ready" from your LCD take a closer look at your PSU. How much current delivers it?To me it looks like your LCD-backlight soaks to much current so that the voltage drops under 4,5V and the PIC resets. If your PSU delivers more than 500mA you should check the board around the Backlight circuit for any short or soldering problem.hope this helpsDoc Quote Link to comment Share on other sites More sharing options...
mgalper Posted April 21, 2007 Author Report Share Posted April 21, 2007 Did you turn the other port (contrast) so that you can see anything? (Without backlight of course).Yes. Still a blank screen.If your PSU delivers more than 500mA you should check the board around the Backlight circuit for any short or soldering problem.Check the LCD board or the core? Quote Link to comment Share on other sites More sharing options...
stryd_one Posted April 21, 2007 Report Share Posted April 21, 2007 Both. Can't hurt :) Quote Link to comment Share on other sites More sharing options...
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