Laplace Posted September 2, 2006 Report Share Posted September 2, 2006 Hi everyone,I managed to solder and build my MB SID Step C without any problems so far.Everything works exept the LED-Matrix - all the LEDs are on all the time andthey flicker. I guess the reason is, that I soldered the Matrix "transposed",that means I soldered all the anodes in rows and the kathodes in colums... ::) :oIt´s supposed to be the outer way round.Has anyone digged deep enougt into the sw-routines of the matrix to know, how much workit would be to solve that problem in the software? I gues i would have to invert all the output signals.Thanx so far,Laplace Quote Link to comment Share on other sites More sharing options...
Mr modnaR Posted September 2, 2006 Report Share Posted September 2, 2006 can you not just swap over the connections? if that still doesn't work, it sounds like something else could be causing the problem. Quote Link to comment Share on other sites More sharing options...
Laplace Posted September 2, 2006 Author Report Share Posted September 2, 2006 I would have to solder the whole matrix again...and that is not very easy since the legs of theLEDs are arranged wrong now...the legs are in rowsand the shorter leg (katodes) would have to be connected in rows but the anode-legs are in the way... :-\ Quote Link to comment Share on other sites More sharing options...
Mr modnaR Posted September 2, 2006 Report Share Posted September 2, 2006 you have 8 connections from the DOUT board to the anodes of the leds, and you have 7 connections to the cathodes, correct? if so, just swap the J5 and J6 connections on the DOUT remembering to have resistors on the J5 but jumpers on the J6. Quote Link to comment Share on other sites More sharing options...
Laplace Posted September 2, 2006 Author Report Share Posted September 2, 2006 I just resoldered the whole thing...it drew me a lot of blood and sweatbut i managed to bend the kathodes backward and the anodes forward.Then i had just enough room to solder it again. It works now and I just found out that the LFOs are displayed in realtime on the LEDs! I didn´t know that...it´s so cool!And Mr modnaR...U make very cool tracks.Thanks for the help. Quote Link to comment Share on other sites More sharing options...
Mr modnaR Posted September 2, 2006 Report Share Posted September 2, 2006 glad to know you got it sorted! cheers for listening to the tracks, just some oldies really. Quote Link to comment Share on other sites More sharing options...
TK. Posted September 3, 2006 Report Share Posted September 3, 2006 The alternative software solution looks simple: the values transfered to the shift registers have to be inverted. This can be done with a "xorlw 0xff" one line above each "call MIOS_DOUT_SRSet" instruction in cs_menu_matrix.incBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
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