Reverse Engineering a HP HIL Interface Keyboard with a Rigol DS1054Z

• Reverse Engineering a HP HIL Interface Keyboard with a Rigol DS1054Z
  Posted by andybarrett1 on 04 Aug, 2024 16:18
• 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
• #1 Reply
  Posted by edavid on 04 Aug, 2024 17:16
• Hasn't this already been done?
  
  https://github.com/tmk/tmk_keyboard/wiki/HP-HIL
  
• #2 Reply
  Posted by andybarrett1 on 12 Aug, 2024 07:19
• That helps 😁
  
  Thank you 👍
  
  Andy
• #3 Reply
  Posted by DavidKo on 21 Aug, 2024 12:14
• 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