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2.7. Get scan data
Function Description:
Retrieves the scan data into the buffer. Returns the length of characters. It also returns the
barcode type if type is not NULL. Return 0 means that the buffer is too short to hold the
data.
USI_GetData should be called when SM_DATAREADY message is received. Or call
USI_ResetData to discard the data. Both of them will reset the data buffer so that next
scan data can come in.
If the data buffer is not empty and a new scan data occurs, it will be discarded and an
error message SM_ERROR with code of SERR_DATALOST will be sent.
Function call:
UINT
USI_GetData
(
LPBYTE
buffer
,
UINT
len
,
UINT
*
type
);
Parameter: (input)
len
:
UINT : Len specifies the maximum length of the buffer.
Parameter: (output)
buffer
:
LPBYTE :
Data buffer for storing scanned data
type
: UINT : barcode type which is defined on
USI.H. Please refer to below list
BCT_CODE_39
// Code 39
BCT_CODABAR
//
CodaBar
BCT_CODE_128
// Code 128
BCT_INTERLEAVED_2OF5
// Interleaves 2 of 5
BCT_CODE_93
// Code 93
BCT_UPC_A
//
UPC
A
BCT_UPC_A_2SUPPS
// UPC A with 2
Supps
BCT_UPC_A_5SUPPS
// UPC A with 5
Supps
BCT_UPC_E0
//
UPC
E
BCT_UPC_E0_2SUPPS
// UPC E with 2 Supps
BCT_UPC_E0_5SUPPS
// UPC E with 5 Supps
BCT_EAN_8
//
EAN
8
BCT_EAN_8_2SUPPS
// EAN 8 with 2
Supps
BCT_EAN_8_5SUPPS
// EAN 8 with 5
Supps
BCT_EAN_13
//
EAN
13
BCT_EAN_13_2SUPPS
// EAN 13 with 2 Supps
BCT_EAN_13_5SUPPS
// EAN 13 with 5 Supps
BCT_MSI_PLESSEY
// MSI Plessey
BCT_EAN_128
// EAN 128
BCT_UPC_E1
//
UPC
E1
BCT_UPC_E1_2SUPPS
// UPC E1 with 2 Supps
BCT_UPC_E1_5SUPPS
// UPC E1 with 5 Supps
BCT_TRIOPTIC_CODE_39
// TRIOPTIC CODE 39
BCT_BOOKLAND_EAN
// Bookland EAN
BCT_COUPON_CODE
// Coupon Code
BCT_STANDARD_2OF5
// Standard 2 of 5
BCT_CODE_11_TELPEN
// Code 11 Telpen
BCT_CODE_32
// Code 32
BCT_DELTA_CODE
// Delta Code
BCT_LABEL_CODE
// Label Code IV
& V
BCT_PLESSEY_CODE
// Plessey Code
BCT_TOSHIBA_CODE
// Toshiba Code
China Postal Code
