nunja
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- nunja
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Mmmm, no pin passed the conductivity test on the arm with the pin 37. Not sure which is the pin 26 but i checked 4 times each pin to make sure. I got a short bip once but never again. I post some photos but I am not sure it won't help. I will have t…
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Okay I will test it ! thanks a lot for your instructions !
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How ? I mean which pin on the cortex ? there is a direct midi in pin to the ARM ? it's the world of SMD here it freaks me out hehe.
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Okay I will take photos with magnifying glass and upload here !
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Last iteration for today : = Midi data seems to be received correctly on pin 37 P1 - steady ~5V when no midi in, varying - varying V from 0 to 5V when incoming loads of midi data = There is no midi packets incoming in the UART (Uart.c): - case if …
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When I check the pin 37 with voltmeter, I got a steady 4.70V when no sending midi in. then when I send lot of midi data (lot of noteon and noteoff in all scales), it varies a lot from 0V to 4.70V. So i guess the issue come after, in the main board ?
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diode and resistors are correct also
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Just did a continuity check between pin 37 of P1 and pin 6 of optocoupler. everything is allright, solders also. maybe the signal is bad with the optocoupler ? I have a new one I will try to change it.
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Just did the test with an average multimeter. Pin 37 shows a steady 0.8V then ramps from 3V to 0.8 periodically on a very regular basis. Like a pulse. I used the backup sysex data of my a4 to send it to the LXR because its huge (2.2M). I guess its t…
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Thx ! I will investigate more in depth following your instructions
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Just ordered the parts on Mouser, I will change the midi in/outs, diodes and resistors and with chance I hope it might work. brendanclarke, do you know if there is any way to debug the MIDI IN on the LCD screen in the code ? Something very simple…
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Just checked the solder joints, seems to be okay to me. I joined photos. There is a way to test if a component is broken ?
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Thx for the reply ! Actually I exchanged it with another peace of synth, I didn't built it myself but the guy told me that it never worked. Solder joints seems to be okay but i need to check again.