Multi-Touch-Kit-ProMicro

As the title suggests, this project is trying to reproduce the result of Multi-Touch kit with a ProMicro board.

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Demo

demo.mp4

The demo is using the source code from "experiment" branch (See Note.2)

The two axis in the demo is a mess, but I am not planning to fixed it in short term.

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Preparation

In this repo:

• A python script to create the grid
• A KiCad project for the pcb design
• The source code for the ProMicro
• Clone of Multi-Touch Kit Processing code

Not in the repo:

• PlatformIO
• Processing

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Procedure

Most steps is following the Multi-Touch Kit Project

1. Create a schemetic
2. Print out the PCB and prepare the components
3. Connect all pins and wires
4. Upload the code through PlatformIO
5. Use Processing to observe the result

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Note

1. Readings from R1 seem having a lot of noise and effecting the result, so it is disabled.
2. "Experiment" branch seem to have a better performance. I am trying to figure out the reason, feel free to comment in the issue.

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Reference:

• Multi-Touch Kit
  • The Starting point of this project
• Sensor Design Guidelines
  • More detail about pcb design can be found here.
  • The python script for generating grid is base on this document.
• Pro Micro & Fio V3 Hookup Guide
  • Pin layout about ProMicro

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Future Plan

• Learn about USB-HID
  • https://www.usb.org/hid
  • https://docs.kernel.org/hid/index.html
  • https://learn.microsoft.com/en-us/windows-hardware/design/component-guidelines/touchpad-sample-report-descriptors
  • https://github.com/smulikHakipod/USB-Emulation/tree/master