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Reverse Engineering a HP HIL Interface Keyboard with a Rigol DS1054Z
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andybarrett1:
Hi

Thank you for reading ....

I want to look at the HP-HIL interface / Protocol with the idea of building a keyboard with a few less keys (Its to make operation a little less cluttered)

In short I need to understand and replicate a few keys from an existing HP HIL Keyboard

The Serial options on the DS1000Z seem a little too specific  linked to SPI / RS232 etc

So was wondering if I could simply use the waveform record .... Hit the keys on the keyboard that are of interest and play back later ?

Or is there another way ...

My Rigol is currently locked away a good way from here ...... So looking for ideas or if yes / no befor I go digging it out :-)

Thank you again

Andy
edavid:
Hasn't this already been done?

https://github.com/tmk/tmk_keyboard/wiki/HP-HIL
andybarrett1:
That helps 😁

Thank you 👍

Andy
DavidKo:
You can check https://groups.io/g/VintHPcom/topic/hp_hil_and_usb/68643874.

It is the thread to http://www.dalton.ax/hpkbd/hil/. I have not build one with USB only with PS/2. For proper PS/2 mouse functionality you need to add pull up resistor - some mice can work without it. I'm not sure if the schematic on dalton site is already updated.

HP-HIL documentation

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