This is a DIY project to push the Dirtywave M8 Headless into a PCB and make it handheld.
This is a DIY project to push the Dirtywave M8 Headless into a PCB and make it handheld. Test build was done on the fabricated PCB. MIDI I/O AUDIO OUT seems to be working well. Kicad data has been withheld from the public due to criticism that it would damage the market. Please contact.
Be sure to follow the official manual. The version you install must be 2.0.5. Otherwise, the midi i/o will not work. https://github.com/DirtyWave/M8Docs/blob/main/docs/M8HeadlessSetup.md
The client software for Headless is m8c, which is published by laamaa. The setup for using the m8c and Raspberry Pi can be seen in detail in the littlescale video.
You can set the fullscreen in the config in the m8c installation folder.
Put in a general autostart program.It's probably faster to ask Google than to ask me. Then KICK The m8c startup command, ". /m8c".
This one also plants a commonly used shutdown program. We connected the GND of the tact switch and the "shutdown button" pad on the PCB to GPIO5 (PIN29) and GND (PIN30) respectively. This is because pins 1 to 28 are blocked by the display. https://www2.quartoknows.com/page/raspberry-pi-shutdown-button
Key mapping is done using a program called "GPIONext", which is often used in RetroPi. The GND must be connected to PIN39 or PIN34, but the other pins can be configured as you like. Use a wire to arrange the wires. https://github.com/mholgatem/GPIOnext
The key layout to be set should follow the m8c manual.
Keys for controlling the progam:
Other parts, such as the DAC module, simply need to be soldered as shown in the image to function.
The setup for using the m8c and Raspberry Pi can be seen in detail in the littlescale video.
Since this video shows video and audio output from the HDMI port, we will assume that audio output is available using a 3.5mm stereo jack if you use a touch display with audio output, available from Aliexpress. Or I'm thinking of getting the sound through a DAC module.
As has been discussed several times on Dirtywave's Discord, it seems possible to implement MIDI IN and OUT in a Headless environment. The developer, trash80, commented "MIDI in is pin 28, MIDI out is pin 1, it's enabled". I plan to implement them as shown in the schematic below.
Key emulation (key mapping) using the GPIO pins of the Raspberry Pi is also currently in the hypothetical stage. There are plenty of people practicing something similar with the Retropi! For the keyswitch itself, I will use the same one as the M8 original.
I'd like to use the tiny little battery charging modules that Aliexpress sells so that I can seamlessly connect the power supply, PSU, and charging. I think I will agonize over where to put the batteries!
James' work has addressed some of the concerns of this project!