cookd Posted January 18, 2008 Report Share Posted January 18, 2008 Hi,this is my first post... I've build a core module from mike, loaded mios into pic but no LCD messages displayed (if I send a clear to LCD from miosstudio debug I get a couple of vertical lines on and off for a while then nothing), backlight is ok and could be dimmed, contrast trim is halfway. LCD is 20x2 chars branded Powertip PC2002LRSpics and pinout, that seems compatible, are in the attachmentsnot sure about the onboard chips compatibility.. any suggestion/experience to share?btw... I've uploaded LCD benchmark... but nothing displayed either..thanks in advance stefano Quote Link to comment Share on other sites More sharing options...
cookd Posted January 18, 2008 Author Report Share Posted January 18, 2008 ERRATA:not sure about the onboard chips compatibility..CORRIGE:I know from the powertip website that the controller is S6A0069X* : KS0066U, or equipped with equivalent IC is this good? do I need to load additional software on pic?thanksstefano Quote Link to comment Share on other sites More sharing options...
dj3nk Posted January 18, 2008 Report Share Posted January 18, 2008 It has to be a HD44780 compatible LCD.look here for other supported lcds:http://www.ucapps.de/mbhp_lcd.htmlgreetz Quote Link to comment Share on other sites More sharing options...
seppoman Posted January 18, 2008 Report Share Posted January 18, 2008 the KS controller is HD44780 compatible. Virtually any text LCD is compatible nowadays that has 16 pins connector (or sometimes 14 plus 2 separate for backlight) and matching pin names. So this can't be the reason. Most LCD problems of midiboxers are caused by wrong wiring and/or bad soldering/shorts, so first doublecheck everything again.S Quote Link to comment Share on other sites More sharing options...
cookd Posted January 18, 2008 Author Report Share Posted January 18, 2008 double checked... problem remains!rewired Jim Henry style... problem remains!lcd interconnection test loaded... voltages ok, no bad solders, no shortsdisconnected backlight... problem remains probably I've to disconnect the midiboxer :P...seriously, could be a faulty LCD? on startup I only see poor signs of life, some blocks/lines feeded then go off and remain off...cheerss Quote Link to comment Share on other sites More sharing options...
seppoman Posted January 19, 2008 Report Share Posted January 19, 2008 ...seriously, could be a faulty LCD? on startup I only see poor signs of life, some blocks/lines feeded then go off and remain off...the normal startup would be to have the first line (full normal height of the first text row) full of blocks. It should look like the last one on this picture:So if you mean by "some blocks/lines" that only some intermittent parts if the display go black, perhaps it is broken. On the other hand, the subsequent clearing of the display is a sign of life.S Quote Link to comment Share on other sites More sharing options...
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