Its possible to hook up a PS/2 mouse (for example touchpads or trackpoints) to your keyboard as a composite device. To hook up a Trackpoint, you need to obtain a Trackpoint module (i.e. harvest from a Thinkpad keyboard), identify the function of each pin of the module, and make the necessary circuitry between controller and Trackpoint module.

qmk.fm is the official website of QMK, where you can find links to this page, the documentation, and the keyboards supported by QMK. About qmk fork with PS/2 and IBM XT Output

2023年10月16日 · PS/2是一种双向同步串行通讯协议，PS/2键盘的时钟信号频率通常在10-20kHz之间。 PS/2按键扫描码存在通码和断码两种。 当检测到某个按键被按下，键盘会向主机发送该按键对应的通码。 如果有一个按键被持续按下没有释放，键盘会不断向主机发送该按键对应的通码。 如果有多个按键同时被持续按下没有释放，键盘会不断向主机发送最后一个被检测到的按键对应的通码。 当检测到某个按键被释放，键盘会向主机发送该按键对应的断码。 可以看出， …

Open-source keyboard firmware for Atmel AVR and Arm USB families - qmk/qmk_firmware

2020年8月3日 · My plan currently would be to use the CH559 (or CH554) in tandem with a more standard MCU which handles QMK (like an Atmega32U4 or STM32F072 or similar). CH559 would be the USB Host for QMK and doing the translation to PS/2. For programming this will require some USB muxes, but nothing too far out of the ordinary.

Open-source keyboard firmware for Atmel AVR and Arm USB families - qmk/qmk_firmware

2018年2月26日 · ps2avrGB的官方刷板应用是BootmapperClient，github上luizribeiro为它做了qmk的适配。 qmk顶顶大名，就不用多介绍了，基于chibiOS系统，支持模拟鼠标，可以一键进入刷机模式。

2018年9月17日 · I've seen other posts about the QMK firmware and the support of a PS/2 Mouse. I've a Teensy2++ and I'm trying to build a keyboard with a trackball that uses it. To test the hardware I've actully tried to build a sample keyboard with 4x4 keys and connect a old PS/2 Mouse. The keys work without problems.

2023年4月11日 · Just a heads up, I found another issue (if you don't have mousekeys enabled, or pointing device enabled, it may error out in the reporting/usb stuff). I've opened a PR for both issues, and it has already been merged upstream, but in the develop branch. For reference, this is the PR with the fixes: https://github.com/qmk/qmk_firmware/pull/20433.

2022年9月5日 · When I do PS2_MOUSE_ENABLE = yes, connecting the pins does not trigger left click. To isolate the problem, I am trying it with just the bare Elite-C microcontroller (without the trackpoint module connected) and verified that the function still does not work (also tried with it connected with no luck).