Datalogic Scanning MAGELLAN 3200VSI Manual do Utilizador descarregar pdf (Página 40)

Image Capture

Magellan

3200VSi

Image Capture to the Host by Host Command

This feature is only available for RS-232 and USB COM interfaces.

The host command format is as follows:

P<cnt>pSBC

where:

P - ASCII 'P' used as preamble of pass-through commands

<cnt> - binary value of 4 indicating 4 bytes to follow

p - ASCII lowercase 'p' ; command to take a picture

S - size value of image as ASCII character

‘S’ == uses scanner's configuration value

‘0’-VGA, (640X480)

‘1’-WVGA, (752X480)

‘2’-SXGA, (1280x1027)

‘3’-CIF (320x240)

B - brightness value in ASCII

‘B’ == uses scanner's configuration value CI_IMAGE_BRIGHTNESS

else ‘0’ thru’9’ specifies brightness

C - contrast value in ASCII

‘C’ == uses scanner configuration value CI_IMAGE_CONTRAST

else ‘0’ thru’9’ specifies contrast

IF the image is of a type the scanner supports, capture and transmission occurs, and the com-

mand is of proper format

THEN

The scanner will transmit an ACK (0x06) to the Host in response to this command.

The image data transmission starts with a 4 byte binary field representing (Big Endian)

number of bytes to follow.

If the “number of bytes to follow” value is zero, there was a problem with generating the

image and the request should be retried.

ELSE

The scanner will transmit a BEL (0x07) to the Host in response to this command.

ENDIF

NOTE

If the USB COM interface has been selected, follow the

USB COM Interface

Set-up

instructions in the Interface Related Features chapter of this guide.

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