geth Posted April 2, 2012 Report Share Posted April 2, 2012 (edited) Hello everyone! I built a lpc17 core and 2 DIN-Modules. I loaded the Midio128-Software on the core and connected one DIN-Module to the core. Now only one connection for a button (the one between ground and D7 of the first block) of the DIN works. And when I connect this, the core sends all 128 notes on (see atachment). As in the DIN-Wiki, I suppose there is a problem with the latch-enable or the clock signal of the DIN's shift register. For troubleshooting I checked the connections between the DIN's shift register and ground and 5V and the Lpcexpresso or the 20-pin IC of the core. I tried with my second DIN-module, there I have the same problem. I checked for a unwanted connection between the latchenable and the clock line, there is none. I ordered new ics (shift register, 16 pin and 20 pin ic), this did not solve my problem. I built a new cable, did not help either. I suppose the problem must be in the core, but right now I don't know what I could do next. So I would be very glad if anybody knows or has ideas where or what problem I have. Thank you in advance gethMidi-in_readout.txt Edited April 2, 2012 by geth Quote Link to comment Share on other sites More sharing options...
geth Posted April 9, 2012 Author Report Share Posted April 9, 2012 After long hours of searching the problem systematically, I decided in an act of desperation to resolder every connection on the core and, well now its working. Yeah! On the downside, I do not know where the mistake was (as I checked nearly all relevant connections via dmm I am still clueless). Well, I should have bought an expensive soldering-iron from the beginning... Greetings Geth Quote Link to comment Share on other sites More sharing options...
Ajax Posted February 28, 2013 Report Share Posted February 28, 2013 seems to be the same issue i'm wrestling with... though i've resoldered my core and it fixed nada :P follow my troubles @ -ajax Quote Link to comment Share on other sites More sharing options...
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