ACS ACR1281U-C8, Руководство по программированию

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ACR1281U-C8 – Application Programming Interface
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5.3. ACR120_ReadValue
Reads a value.
High Level API :
DLLAPI INT16 AC_DECL
ACR120_ReadValue( INT16 hReader,
UINT8 Block,
INT32* pValueData);
Parameters Description
hReader Handle to the reader returned by AC_Open()
Block Block number
pValueData Contains the value read. It is 32 bit signed integer.
Return Value INT16 Result code. 0 means success.
Table 22 : ACR120_ReadValue Command Description
Low Level Frame Structure:
Command: From PC to Reader (6 bytes)
Command Code
(1 byte)
Command Data Length
(1 byte)
Instruction Code
(1 byte)
Data Length
(1 byte)
Data
(1 byte)
E0h 03h 07h 01h Block
Response: From Reader to PC (9 bytes) <<Success>>
Response Code
(1 byte)
Response Status
(2 bytes)
Response Data Length
(2 bytes)
Response Data
(4 bytes)
E1h INT16 (>=0) 0004h pValueData
Or
Response: From Reader to PC (5 bytes) << Fail>>
Response Code
(1 byte)
Response Status
(2 bytes)
Response Data Length
(2 byes)
E1 INT16 (<0) 0000