串口摄像机通信协议.doc

摄像机使用手册
摄像机V8系列是一款基于RS485总线、RS232接口的高性能的彩色监控终端,为了实现在某些不需要实时监控的场合,通过RS-485、RS232接口实现图像监控。总线采用半双工通信,可支持7台设备实现多点监控。
Figure 1 – System block diagram
Features
Small in size, low cost and low powered () camera module for high-resolution serial bus security system or PDA accessory applications.
On-board EEPROM provides mand-based interface to external host via RS-232
UART: for transferring JPEG still pictures or 160x128 preview ***@8bpp with
On board OmniVision OV7725 VGA color sensor
Built-in JPEG CODEC for different resolutions
Built-in down sampling, clamping and windowing circuits for VGA, QVGA, 160x120 or 80x60 image resolutions
Built-in color conversion circuits for 2-bit gray, 4-bir gray, 8-bit gray, 12-bit RGB, 16-bit RGB or standard JPEG preview images.
No external DRAM required.
Serial Interface
1. Single Byte Timing Diagram A single byte RS-232 transmission consists of the start bit, 8-bit contents and the stop bit. A start bit is always 0, while a stop bit is always 1. LSB is sent out first and is right after the start bit.
2. Command Timing Diagram A mand consists of 6 continuous single byte RS-232 transmissions. The following is an example of SYNC (AA0D00000000h) command.
4P端子定义:
(拨开热所管,从线的方向看端子)

2 1
4 3

1
2
3
4
摄像头接收
(RXD)
电源地
DC 5V
摄像头发送
(TXD)
绿色
黑色
红色
黄色
通讯基本参数:
RS485半双工模式传输,参数设置如下:
单字节时序:
波特率: 自适应
数据位