Newland FM420 Handbuch PDF herunterladen (Seite 52)

nlscan.com

Page 43

USB InterfaceUSB Interface

Code Programming ON

Code Programming OFF

Tools

HID-POS

Access the Device in Your Program

CreateFile opens the device as a HID, then ReadFile delivers the scanned data

to the application. Use WriteFile to send data to the device.

For complete information on USB and HID interfaces, please see www.USB.

org.

Getting Scanned Data

After scanning and decoding a bar code, the device sends the following input report:

Bit

Byte 7 6 5 4 3 2 1 0

0 Report ID = 0x02

1 Length of the bar code (ﬁeld "Decoded Data")

2-57 Decoded Data (1-56)

58-61 Reserved (1-4)

62 Newland Symbology Identiﬁer or N/C：0x00

63 - - - - - - -

Decode

Data

Continued

VID and PID Table

USB uses two numbers to identify a device and ﬁnd the correct drivers. The ﬁrst is the VID (Vendor ID),

assigned by the USB Implementers Forum. The Newland vendor ID (VID) is 1EAB (hex). The second is the

PID (Product ID). A range of PIDs is used for each Newland product sub family, so each PID contains a base

number and an interface type (keyboard, COM port, etc.).

Device Interface Type PID(Hex) PID(Dec)

EM2027*

Base 0200 512

HID POS 0210 528

HR200

Base 0100 256

HID POS 0110 272

*EM2027：A 2D barcode scan engine which is also designed and manufactured by Newland.

please see www.nlscan to get more EM2027 product info.

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 155 156

Keine Kommentare

Newland FM420 Handbuch Seite 52