Friday, May 31, 2019

Implementing USB Video Device Class (UVC) Device Driver on Microchip USB Stack, PIC32

I was recently working on a little project in which i need to stream video from mcu to PC, so i decided to look for a solution. My first obvious solution was to make a custom protocol over USB bulk or isochronous Transfer and also make some application in Qt or MATLAB to stream and display video.

But when i looked little bit more , I found out that there is already a USB video class assigned for this specific task. Driver for UVC device are already standard and present in many well used OS. Driver is present in Windows and Linux both.

As Video over USB is quite resource intensive task so it is not common to use a MCU,  I was using PIC32 MCU for project, and USB stack Provided by microchip was no exception, Microchip USB stack does not have support for UVC. So i decided to implement my self.

This project will be multi part project ,
in First part i will have static image 160x120 pixel resolution, stream over the USB and play in VLC.
Second Part i will interface a OV7670 camera to the MCU and stream live video on VLC.

A Sample image 160x120 Pixel converted to yuy2 , Streamed over USB played on VLC