Compaq uSign Signature Capture Module uSign 100 Manual de usuario descargar pdf (Pagina 13)

uSign User Manual

7.0 uSign commands description

(Version: 0.02 Date: 2007-03-19) Note: digits are given in little-endian format.

7.1 Command protocol:

Host to device: STX LenL LenH CommandData Lrc1 Lrc2 ETX

STX: 0x02. 1 byte.

LenL+LenH: sizeof(CommandData). 2 bytes.

CommandData: main command string. Several bytes needed.

Lrc1: Exclusive or of CommandData. 1 byte.

Lrc2: Sum of CommandData. 1 byte.

ETX: 0x03. 1 byte.

Device to Host: STX LenL LenH ResponseData Lrc1 Lrc2 ETX

STX: 0x02. 1 byte.

LenL+LenH: sizeof(ResponseData). 2 bytes.

ResponseData: main response string. Several bytes needed.

Lrc1: Exclusive or of ResponseData. 1 byte.

Lrc2: Sum of ResponseData. 1 byte.

ETX: 0x03. 1 byte

7.2 System Commands

7.2.1 Get firmware version

Command string: 78 01

Response string: IDTECH-USIGN V0.02

7.2.2 Get serial number

Command string: 78 02

Response string: Serial number

7.2.3 Get clip area

Command string: 7A 04 01

Response string: Clip area data (8 bytes)

Clip area is a rectangle coded as: left (2 bytes) + top (2 bytes) + right (2 bytes) + bottom

(2 bytes)

7.2.4 Set clip area

Command string: 7A 04 02 Clip area data( 8 bytes)

Response string: 0xE0

7.2.5 Clear clip area

Command string: 7A 08

Response string: 0xE0

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Compaq uSign Signature Capture Module uSign 100 Manual de usuario Pagina 13