Host communication protocol

Note

This demo is based on a 5MP camera

Communication protocol block diagram

Start

Command

Parameter

Stop

0X55

CMD

parameter

0xAA

Communication protocol command

CMD

Command effect

parameter

0x01

Set camera resolution
bit[6:4]: Camera data format

  • 1: Indicates that the resolution of the JPEG format is set

  • 2: Indicates the resolution of the RGB565 format

  • 3: Indicates the resolution of the YUV format bit

[3:0]: Set the resolution of the camera

  • 0: 160x120

  • 1: 320x240

  • 2: 640x480

  • 3: 800x600

  • 4: 1280x720

  • 5: 1280x960

  • 6: 1600x1200

  • 7: 1920x1080

  • 8: 2048x1536

  • 9: 2592x1944

0x02

Start streaming mode

  • 1: 320x240

  • 2: 640x480

0x03

Set brightness

  • 0：default

  • 1：+1

  • 2：-1

  • 3：+2

  • 4：-2

  • 5：+3

  • 6：-3

  • 7：+4

  • 8：-4

0x04

Set contrast

  • 0：default

  • 1：+1

  • 2：-1

  • 3：+2

  • 4：-2

  • 5：+3

  • 6：-3

0x05

Set saturation

  • 0：default

  • 1：+1

  • 2：-1

  • 3：+2

  • 4：-2

  • 5：+3

  • 6：-3

0x06

Set EV

  • 0：default

  • 1：+1

  • 2：-1

  • 3：+2

  • 4：-2

  • 5：+3

  • 6：-3

0x07

Set white balance

  • 0：Auto

  • 1：Sunny

  • 2：Office

  • 3：Cloudy

  • 4：Home

0x08

Set special effects

  • 0：Normal

  • 1：Cool light

  • 2：Warm

  • 3：Black and white

  • 4：Sepia

  • 5：Negative

  • 6：Greenish

  • 7：Overexposure

  • 8：Solarize

  • 9: Yellowish

0x09

Focus control
Exclusive to 5MP

  • 0：Open auto focus basic configuration

  • 1：Single auto focus

  • 2：Continuous autofocus

  • 3：Pause auto focus

  • 4：Turn off auto focus

0x0a

Exposure control

  • 1: Turn on auto exposure

  • 0: Turn off auto exposure

0x0b

Gain control

  • 1: Turn on auto gain

  • 0: Turn off auto gain

0x0c

White balance control

  • 1: Turn on auto white balance

  • 0: Turn off auto white balance

0x0d

Manual gain
Gain value of two bytes

  • 5MP adjustment range: 10~1023

  • 3MP adjustment range: 1~31

0x0e

Manual exposure
exposure value of three bytes

  • 5MP adjustment range: 1000~30000

  • 3MP adjustment range: 100~1400

0x0f

getting information

Get the basic information of the camera. For example: the resolution supported by the camera, whether the camera supports auto focus

0x10

Taking Pictures

0x11

Set sharpness
Exclusive to 3MP

  • 0：default

  • 1：+1

  • 2：+2

  • 3：+3

  • 4：+4

  • 5：+5

  • 6：+6

  • 7：+7

  • 8：+8

0x12

Debug mode
Three bytes

  • Byte 1 represents the high eight bits of the register

  • Byte 2 represents the lower eight bits of the register

  • Byte 3 represents the value written to the register

0x21

Stop streaming mode