che Posted March 15, 2004 Report Share Posted March 15, 2004 Hi If got a problem ???I have made a core and a sid module. I checked the voltage levels between the most important pins and there wasn’t a problem. So I connected the LCD and power.. but I only saw the backlight!Could someone please help me? Quote Link to comment Share on other sites More sharing options...
pay_c Posted March 15, 2004 Report Share Posted March 15, 2004 Have you already burnt the firmware (first the bootloader - nothing on the LCD, then MIOS - just the MIOS startup on the screen, and then the app)?Without anything on your PIC, the LCD should be black in the first line (completely) and the second line should be blank.Have you also moved the contrast pot (normally the contrast must be on maximum for the most LCDs to see stuff good)? Quote Link to comment Share on other sites More sharing options...
che Posted March 15, 2004 Author Report Share Posted March 15, 2004 I use the 16f firmware... because i had one spare from my mdibox 16. ;) i already burnt the firmware... I have moved the pots... and all i can see now is the black first line and a second blank line.Could there be an problem with the pic? Quote Link to comment Share on other sites More sharing options...
pay_c Posted March 15, 2004 Report Share Posted March 15, 2004 Perhaps, yeah. What LCD are you using?Did you use the right Osci? You need a 20 Mhz one for 16F´s and 10 Mhz for 18F´s... Quote Link to comment Share on other sites More sharing options...
che Posted March 15, 2004 Author Report Share Posted March 15, 2004 osci: 20 mhzLcd: An second hand lcd but the controler is HD44780 compatible. i'll try to reburn the pic ! Quote Link to comment Share on other sites More sharing options...
che Posted March 15, 2004 Author Report Share Posted March 15, 2004 I've reprogrammed the pic still no characters on my lcd! I have took the 16f from the midibox 16 and still nothing. Quote Link to comment Share on other sites More sharing options...
pay_c Posted March 15, 2004 Report Share Posted March 15, 2004 It sounds to me like a pinning problem. Some LCDs have weird pinnings!! (!!! !!! !!!)...Try to get the datasheet or so of that type of display. If you can´t find it, try to figure out which lines are power/ground and the datalines (power/gnd: mostly a little larger, data: mostly 8 lines very narrow together and going to the ICs).Before that you could figure out if your PIC is functioning: Just get any app on there and try to send MIDI "blind" (e.g. moving some pot or encoder or whatever). Just to look if there is coming anything out of there.Good luck!! Quote Link to comment Share on other sites More sharing options...
che Posted March 21, 2004 Author Report Share Posted March 21, 2004 oke I moved up to mios now... got an 18f452 i havechanged the cristal to a 10 mhz and loaded the boot strap loader into the pic using the jdm. what has to the second stap? Quote Link to comment Share on other sites More sharing options...
Guest psytron Posted March 21, 2004 Report Share Posted March 21, 2004 load an application via midi and then see if it works!apps are on the mios download page. Quote Link to comment Share on other sites More sharing options...
arumblack Posted March 21, 2004 Report Share Posted March 21, 2004 remember to load the MIOS before the app. and after loading mios you should get a message on the screen. Quote Link to comment Share on other sites More sharing options...
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