kbiva has posted a detailed tutorial on how to connect and control HP LaserJet 4000 front panel with Bus Pirate v3.6:
Connected 7 lines from printer front panel to corresponding Bus Pirate pins.
SPI parameters set in Bus Pirate:
-SPI speed is 1Mhz
-Clock polarity: Idle low
-Output clock edge: Active to idle
-Input sample phase: Middle
CS: /CS
-Output type: Normal (H=3.3V, L=GND)Protocol description – sending 2 bytes and receiving 2 bytes
Command set is HD44780 compatible.
Via the contact form. Thanks Kevin!
Check out the video after the break.
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