DVP Capture

[Chinese]

1 Overview

The main function of taking pictures is to store a frame of raw data collected by the dvp sensor on the SDCard after being compressed and encoded by the jpeg encode module.

2 Code Path

demo path:./components/demos/media/video/dvp_capture/dvp_capture.c

3 Client command

The commands support by demo

Command	Param	Description
dvp set_cfg param1 param2 param3	param1:dev_id	the type of using dvp
	param2:image resolution	the resolution output
	param3:frame rate	the frame rate output
dvp init	NULL	init dvp function
dvp capture param1	param1:file_id	the head neme of image
dvp deinit	NULL	deinit dvp function

The macro configuration that the demo runs depends on:

NAME	Description	File	value
CONFIG_JPEG_ENCODE	support hw jpeg encode	middleware\soc\bk7256\bk7256.defconfig	y
CONFIG_CAMERA	suport use dvp camera	middleware\soc\bk7256\bk7256.defconfig	y
CONFIG_USE_APP_DEMO_VIDEO_TRANSSER	support video transfer	middleware\soc\bk7256\bk7256.defconfig	y
CONFIG_NET_WORK_VIDEO_TRANSFER	support wifi transfer	middleware\soc\bk7256\bk7256.defconfig	y
CONFIG_COMPONENTS_P2P	support p2p transfer	middleware\soc\bk7256\bk7256.defconfig	n
CONFIG_CAMERA_USE_I2C1	suport use I2C1	middleware\soc\bk7256\bk7256.defconfig	y

4 Demo introduction

The steps performed by the demo are as follows:

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

2. Send the following commands in sequence

   fatfstest M 1

   dvp set_cfg 3 480 20

   dvp init

   dvp capture 1(file_id)

   dvp deinit

Figure 1. sensor connection

5 Detailed configuration and its description

1.set dvp parameters: dvp set_cfg param1 param2 param3

param1:0-7, Corresponding to the following types of dvp cameras, currently only 3 and 6 are supported.

PAS6329_DEV 0

OV_7670_DEV 1

PAS6375_DEV 2

GC0328C_DEV 3

BF_2013_DEV 4

GC0308C_DEV 5

HM_1055_DEV 6

GC_2145_DEV 7

param2:resolution

GC0328C_DEV:480(640*480), 240(320*240), 272(480*272)

HM_1055_DEV: 720(1280*720)

param3:frame rate

GC0328C_DEV: 5, 10, 20, 25

HM_1055_DEV: 5, 10, 15, 20

2.capture command: dvp save_image file_id

file_id: range(0-255)

Note

Note: The above camera command supports continuous photography, but the file_id needs to be changed every time, and the id of each image cannot be the same.