UVC Capture

[Chinese]

1 Overview

The main function of taking pictures is to store a frame of raw data collected by the UVC sensor on the SDCard.

2 Code Path

demo path:./components/media/camera/uvc.c, ./components/media/storage/storage_act.c

3 Client command

The commands support by demo

Command	Param	Description
media uvc open [psram]	param:resolution, optional	open uvc camera
media capture param	param:picture name	capture and save
media uvc close	NULL	close uvc camera

The macro configuration that the demo runs depends on:

NAME	Description	File	value
CONFIG_USB_HOST	support usb host	properties\soc\bk7256_cp1\bk7256_cp1.defconfig	y
CONFIG_USB_UVC	support uvc	properties\soc\bk7256_cp1\bk7256_cp1.defconfig	y

4 Demo introduction

The steps performed by the demo are as follows:

1. Prepare the uvc camera, the connection method is as shown below:

2. Send the following commands in sequence:

   fatfstest M 1

   media uvc open

   media capture 123.jpg

   media uvc close

Figure 1. uvc connection diagrame

5 Detailed configuration and its description

1. Open uvc camera

   media uvc open [param]

   [param]: optional parameter, if not written, the default resolution is 640*480.

   The supported parameters are determined by the uvc device itself, optional: 1280X720, 640X480, 800X480, 480X320.

2. Start capture and set image name

   media caputre param

   param:xxx.jpg, the name of the stored photo

3. Close uvc

   media uvc close

Note

Note: The above camera command supports continuous photography.