Converting More Vintage Grass Valley Hardware to USB

From Glen Akins (@bikerglen):

Converting More Vintage Grass Valley Hardware to USB

In this project, I convert two panels from a vintage Grass Valley video switcher into general-purpose USB input and output devices without modifying the original panels. This project required both reverse engineering the hardware and deciphering the software protocols used to communicate with the panels. Because these panels required learning how to communicate with a microcontroller and a small FPGA, this project was significantly more challenging than the previous project where I converted a matrix button panel from the same mixer into a USB device.

In this write up, we’ll examine the two panels in detail and determine the hardware interface to the panels. Once the hardware interface is determined, we’ll build some boards to use to help decipher the protocols used to control the boards. Once the protocols are understood, we’ll build a second set of boards to control the panels using USB then develop the USB software and an example Linux application that controls the panels over USB. This project took about four months from start to completion.

Converting More Vintage Grass Valley Hardware to USB

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s