Hello.
I'm completetley new to microprocessors and started with an easy project for a small Synthesizer called Mopho.
All shematics and source code i got from http://karg-music.blogspot.com/2016/01/mopho-morphosis.html. Thanks a lot KARG!
Except some small issues which i was able to solve by myself, everything worked very well.
Only Problem I have: When i connect the hexinverter to the optocoupler no other Midi Message from Midi in DIN connector arrives the Synth. Doesn't matter if usb is connected or not. Teensy is powered directly by a 5v rail from the synth. I'm very interested in why this happens and why always the teensy has first priority.
Also i'm thinking about a solution for the problem. So my question: Is there a way to totally power off a serial port? (in my case RX1 and TX1, i think) because i'm in the opinion the issue depends on the permanent voltage which is applied to the optocoupler. In this case: would it be possible to power serial1 on automatically if usb is plugged in by connecting VUSB to an input pin?
Or should i use a 5v relais which switches on and powers the teensy when the usb cable is connected?
Hope sombody can help with some infos, i'd really love to use the teensy midi interface in my synth. But without working DIN connectors i can't.
Thanks a lot for any help
matthias
Code: https://github.com/k-a-r-g/Mopho-Morphosis
Project Info: http://karg-music.blogspot.com/2016/01/mopho-morphosis.html
I'm completetley new to microprocessors and started with an easy project for a small Synthesizer called Mopho.
All shematics and source code i got from http://karg-music.blogspot.com/2016/01/mopho-morphosis.html. Thanks a lot KARG!
Except some small issues which i was able to solve by myself, everything worked very well.
Only Problem I have: When i connect the hexinverter to the optocoupler no other Midi Message from Midi in DIN connector arrives the Synth. Doesn't matter if usb is connected or not. Teensy is powered directly by a 5v rail from the synth. I'm very interested in why this happens and why always the teensy has first priority.
Also i'm thinking about a solution for the problem. So my question: Is there a way to totally power off a serial port? (in my case RX1 and TX1, i think) because i'm in the opinion the issue depends on the permanent voltage which is applied to the optocoupler. In this case: would it be possible to power serial1 on automatically if usb is plugged in by connecting VUSB to an input pin?
Or should i use a 5v relais which switches on and powers the teensy when the usb cable is connected?
Hope sombody can help with some infos, i'd really love to use the teensy midi interface in my synth. But without working DIN connectors i can't.
Thanks a lot for any help
matthias
Code: https://github.com/k-a-r-g/Mopho-Morphosis
Project Info: http://karg-music.blogspot.com/2016/01/mopho-morphosis.html
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