USB keyboard/mouse to PS/2 interface converter using a Raspberry Pi Pico
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Keyboard only variant: https://github.com/No0ne/ps2pico
PC-XT variant: https://github.com/No0ne/ps2pico/tree/xt-version
PiKVM integration: https://docs.pikvm.org/pico_hid/
- Download
ps2x2pico.uf2from https://github.com/No0ne/ps2x2pico/releases - Copy
ps2x2pico.uf2to your Pi Pico by pressing BOOTSEL before pluggging in. - 3.3V/5V conversion is done using a bi-directional level shifter: https://learn.sparkfun.com/tutorials/bi-directional-logic-level-converter-hookup-guide/
- Afterwards connect a USB keyboard and/or mouse using an OTG-adapter and optional USB hub.
- Also works with wireless keyboards and mice with a dedicated USB receiver.
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Pico GPIO11 ______| LV1 HV1 |______ PS/2 keyboard data
Pico GPIO12 ______| LV2 HV2 |______ PS/2 keyboard clock
Pico GPIO13 ______| LV HV |______ PS/2 5V + Pico VBUS
Pico GND ______| GND GND |______ PS/2 GND
Pico GPIO14 ______| LV3 HV3 |______ PS/2 mouse data
Pico GPIO15 ______| LV4 HV4 |______ PS/2 mouse clock
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export PICO_SDK_PATH=/path/to/pico-sdk
mkdir build
cd build
cmake ..
make
- https://github.com/No0ne/ps2pico
- https://wiki.osdev.org/PS/2_Keyboard
- https://wiki.osdev.org/PS/2_Mouse
- https://wiki.osdev.org/Mouse_Input
- https://wiki.osdev.org/%228042%22_PS/2_Controller
- http://www-ug.eecg.toronto.edu/msl/nios_devices/datasheets/PS2%20Keyboard%20Protocol.htm
- http://www-ug.eecg.utoronto.ca/desl/nios_devices_SoC/datasheets/PS2%20Mouse%20Protocol.htm
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