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 |
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