ACS ACR1281U-C8, Programming Manual

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ACR1281U-C8 – Application Programming Interface
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Page 23 of 52
4.2. ACR120_ListTags
Lists out the serial numbers of all tags which are in readable antenna range.
High Level API :
DLLAPI INT16 AC_DECL
ACR120_ListTags( INT16 hReader,
UINT8* pNumTagFound,
UINT8 pTagType[4],
UINT8 pTagLength[4],
UINT8 pSN[4][10]);
Parameters Description
hReader Handle to the reader returned by AC_Open()
pNumTagFound Contains the number of TAG listed
pTagType[4] Contains the TAG type
pTagLength[4] Contains the length of the serial number
pSN[4][10] The flat array of serial numbers. All serial numbers
are concatenated with fixed length (10 bytes)
Return Value INT16 Result code. 0 means success.
Table 17 : ACR120_LIstTags Command Description
Low Level Frame Structure:
Command: From PC to Reader (5 bytes)
Command Code
(1 byte)
Command Data Length
(1 byes)
Instruction Code
(1 byte)
Data Length
(1 byte)
E0h 02h 03h 00h
Response: From Reader to PC (6 + N x 12 bytes) << Success or Fail >>
Response Code
( 1 byte)
Response Status
(2 bytes)
Response Data Length
(2 bytes)
Response Data
(1 byte)
E1h INT16 (>=0) 01h
+
N x 0Ch pResultTagFound (N)
+ Response Data Block 0
Mifare Response Data Block [0]
(1 byte) (1 byte) (10 bytes)
pTagType[0] pTagLength[0] pResultSN[0] (Serial Number)