Pico USB Camera

Project Link https://github.com/mxyxbb/rp2040_ov7670_usb_camera/tree/main

Introduction Video Link https://www.bilibili.com/video/BV123e5ehEis/?spm_id_from=333.999.0.0&vd_source=6e817c3943bff9f1749caaa76f60e5dc

Pico-SDK-v1.5.1 is used.

Description

Hello everyone, I made a USB camera and would like to share it with you. In this project, I used the Raspberry Pi's RP2040 microcontroller to drive the OV7670 camera and captured images in YUV422 format with a resolution of 320x240. Then I used the TinyUSB USB protocol stack to transfer the image data to the computer in the form of a USB Video Class (UVC) Device through the 12Mbps full-speed USB interface integrated on the RP2040. The current frame rate is only 5, and there is still room for optimization（To do）.

大家好啊，我制作了一个USB摄像头，向大家分享一下。 这个项目中使用树莓派家的RP2040微控制器驱动OV7670摄像头，捕获到了320x240分辨率的YUV422格式的图像。然后我通过RP2040上集成的12Mbps的全速USB接口，使用TinyUSB的USB协议栈，以USB视频类设备，也就是 USB Video Class（UVC）Device的形式，将图像数据传输到了电脑上面。目前的帧率只有5，还有优化空间。

Wiring

Wire the following Raspberry Pi Pico pins to an OV7670 board.

Raspberry Pi Pico	OV2640
GND	GND
3V3(OUT)	VCC (3.3)
GP3	XCLK
GP4 (I2C0 SDA)	SDA1
GP6	D0
GP7	D1
GP8	D2
GP9	D3
GP10	D4
GP11	D5
GP12	D6
GP13	D7
GP14	PCLK
GP15	HREF
GP16	VSYNC
GP17	RST
GP21 (I2C0 SCL)	SCL1

Reference link

https://github.com/usedbytes/camera-pico-ov7670

https://github.com/the6p4c/rp2040_ov2640

Reference Docs

OV7670/OV7171 CMOS VGA (640x480) CameraChip™ Implementation Guide

OV7670 Datasheet

Footnotes

1. Likely require I2C pullups unless breakout board provides them. Even so, adding a 10k pullup won't hurt. ↩ ↩²