Karlchen Posted January 28, 2008 Report Share Posted January 28, 2008 I finally managed to put my MidiCV-interface components into a case, but unfortunately the buttons don't work anymore now. They have been fully functional before >:(So far, I haven't figured out the reason. I guess, something is wrong with the communication of the DINX1 and the CORE module.I have taken the modules out of the case again and made some measurements. This is what I have found out:- Pressing the buttons on the DINX1 pulls the inputs from 5V to 0V.- There is a clock signal at the DINX1.- The LD-Line of the DINX1's shift register is constantly 5V, no matter if a button is pressed.- The serial output of the DINX1 is a rectangular signal, which loses amplitude when one of the 4 buttons is pressed.Can anybody tell my, if that sounds correct so far? Seems like I'm lacking some basic knowledge here... Quote Link to comment Share on other sites More sharing options...
TK. Posted January 28, 2008 Report Share Posted January 28, 2008 How did you measure the RC (=LD) line, with a multimeter, or with a scope? Because the RC signal is a very short pulse, which toggles each mSHere the link to the troubleshooting guide:http://www.midibox.org/dokuwiki/din_module?s=dinx4The srio_interconnection_test allows you to check, if the signals are still available at the 74HC165, or if there are shorts.Also the midio128 check could make sense - just to ensure that there isn't a usage issue with MBCVBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
Karlchen Posted February 6, 2008 Author Report Share Posted February 6, 2008 I found the reason in the meantime: It was a short caused by the screws with which I mounted the board to the frontplate. I looked for this in the first round, but obviously not thoroughly enough... Quote Link to comment Share on other sites More sharing options...
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