Unitech PA500 Programming Manual

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4. Scanner3.DLL – Backward compatible API for PT930/PT930S’s Scanner3.dll
Note : For PA500, it need to dynamically load DLL for using Unitech built-in DLL (Unitech will not
provide *.H and *.LIB for compiler), please refer to Chapter 7 for programming guide.
4.1. Enable Decoder
Function Description: This function will open COM2 port, create a thread to get any barcode input from
Decoder Chip, and then store input data in the system buffer. Application can use
function call PT_GetBarcode() to get input data from the system buffer.
Function call:
INT PT_EnableBarcode(VOID);
Return code:
=1 Create new thread fail
=2 Cannot re-enable
=3 Cannot open COM2
=4 Upload parameter from Hamster fail
=0 OK
4.2. Disable Decoder
Function Description:
This function will close COM2 port and then remove thread which is created by
PT_EnableBarcode()
Function call:
VOID PT_DisableBarcode( VOID );
4.3. Check barcode input
Function Description:
This function is used to check whether there is available barcode data on system
buffer which is successfully decoded by decoder chip.
Function call:
BOOL PT_CheckBarcode( VOID );
Return code:
TRUE = There is input data on system buffer.
FALSE = There is no data on system buffer.

Unitech PA500 Specifications

System Memory

SDRAM	64 MB
Flash ROM	64 MB

Display

display resolution	240x320 QVGA
display type	Color Transflective TFT
touch screen	yes

Laser Bar Code Scanner

scan rate	104 scans/sec ± 12 scans/sec
scan angle default	47°±3°
scan angle reduced	35°±3°

Power

main battery voltage	3.7 V
main battery capacity	2200 mAh
rechargeable time	3.5 hours

Operating Environment

operating temperature	32°F to 122°F (0°C to 50°C)
storage temperature	-4°F to 140°F (-20°C to 60°C)
relative humidity	5% ~ 95% (non-condensing)

Weight and Dimensions

weight with battery and scan engine	Under 213 g
length	126 mm
height	23 mm