PTC01 Infrared RS232 Serial Camera

Camera Interfaces

PTC01 serial camera with an external processor communication interface RS232interface. Interface follows

Webcam drawn four lines, red, black, blue, yellow.
Red ------ positive power supply ( + 5V )
Black ------ negative power supply, DB9 serial port first 5pin 
blue ------ DB9 serial section 2PIN ( the RXD )
Yellow ------ DB9 serial section 3PIN ( the TXD )

PTC01 camera is equipped with internal default SP3232 , from DB9 serial article 2 , paragraph 3pin out of the RXD , the TXD is RS232 level signals can be directly matched standard PC machine serial port level.

If you are connected directly to a microcontroller or ARM and other controller chip TTL level serial port, you need to remove the SP3232 .

In general, we recommend that the external controller can also add SP3232 , so the connection between the controller and the camera can be long enough, and will not affect the data transmission. Because, as with TTL level, the camera image compression with CPU distance of not more than 1 Mi .

note:

( 1 )Camera operating current 80-100MA , infrared light work a total of 200-300mA , power consumption is large, and because the serial camera work is passive, it is recommended to use controllable switching power supply serial camera control.

(2) Power-up the camera for the first time 2.5s begin sending and receiving instructions.

common communication protocol

reset command : 56002600   Back: 76002600

camera instruction : 5600360100 Back: 7600360000

read film images instruction length : 5600340100 Back: 76 00 34 00 04 00 00 XX YY

 YY XX  ------- image data length, XX is the high byte, YY is the low byte

 the captured image data read instruction : 56 0C 00 0A 00 32 00 00 00 00 XX YY XX YY ZZ ZZ

Returns: 7600320000 (interval) the FF D8  . . . . . . D9 the FF (interval) 7600320000

XX XX 00 00  ------ start address (start address must be a multiple of 8, the general set 0000 )

YY YY 00 00  ------ image data length (high byte first, after the low byte)

ZZ ZZ        -------- interval (= XX XX * 0.01 ms, preferably provided as a small dot 00 0A )

Note: the JPEG image file must be based on FF D8 beginning, the FF D9 end

 stops taking command : 5600360103 Back: 7600360000

 Setting camera image compression ratio command : 56 00 31 05 01 01 12 04 XX   Returns: 7600310000

XX general election 36 (range: 00 ---- FF)

 Setting camera image size instruction : (default size is: 320 * 240)

5,600,310,504,010,019. 11  (320 * 240) Returns: 7600310000

5,600,310,504,010,019 00  (640 * 480)

 power-down command :  56 00 03 00 01 01. 3E    Back: 76 00 00 00. 3E

  Exit power-saving state command:  56 00 03 00 01 00. 3E     Back: 76 00 00 00. 3E

 modify serial rate instruction :  56 00 24 03 01 XX XX     Returns: 7600240000

XX XX         rate

AE C8 9600

56 E4 19200

. 2A  the F2 38400

. 1C  4C 57600

0D A6 115200

The default baud rate is: 38400

PTC01 camera head power initialization process

(1) Power

(2) delay of 2.5 seconds

(3) reset command

(4) to set the image size photographs instruction

(5) is set to taking pictures compression ratio command

The process pictures

(1) send out a snapshot command

Image-length instructions (2) sends a read shot

Image data instruction (3) sends a read shot

(4) Finally, the transmission stop photographing instruction

documentation : http://www.putal.com.cn/582/582/3