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+---
+title: "Framework joystick"
+date: 2025-07-11T22:11:00+01:00
+draft: false
+summary:  "PSP joystick extension with ch32v003 for framework laptops..."
+images: ["/static/img/led-cricle-rainbow.png"]
+---
+
+I attended [38c3](https://events.ccc.de/congress/2024/infos/index.html) last year and it was amazing as always. I brought a modified robot vacuum to the event (it has BLDC motors and goes fast). But I forgot the gamepad so I chouldn't even drive it around :/  
+
+So instead of goofing around I goofed around in KiCad and make this[^1]:
+
+![FW-EC-PSP-Joystick](/img/FW-EC-PSP-Joy-inserted.jpg#center)
+
+I ordered the PCBs just before leaving for new years eve. And with every PCB project I needed a secound iteration. The error that got me wasn't actually in the design. I left the tickness of the PCB at the standard of 1.6mm and so the USB-C plug did not fit as its designed for 0.8mm PCBs 🤦.  
+It wasn't nice but by bending all of the USB-C plug's pins I was able to solder them. After flashing the [gamepad example](https://github.com/cnlohr/rv003usb/tree/master/demo_gamepad) from cnlohr's software usb library for the ch32v003[^2] it just works :D It could use some offset calibration (leaving the joystick in the middle does not result in it reporting 0,0) and the imu sensor i added has no driver yet, but I was able to control the robot at this point so I call the project done for now :)
+
+
+...I put the design files[^3] and the code on [github](https://github.com/schnilz/FW-EC-PSP-Joy). So feel free to make your own (there be dragons; no documentation, ask questions maybe)
+
+![FW-EC-PSP-Joystick uninserted](/img/FW-EC-PSP-Joy-uninserted.jpg)
+
+[^1]: the PCB, the rest was designed later
+[^2]: THE 10cent riscV microcontroller!
+[^3]: all CAD files created with [FreeCAD](https://www.freecad.org/) <3
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