ACS ACR1281U-C8, Programming Manual

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ACR1281U-C8 – Application Programming Interface
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Page 19 of 52
3.13. ACR120_WriteUserPort
Reads the state of user port.
High Level API :
DLLAPI INT16 AC_DECL
ACR120_WriteUserPort( INT16 hReader,
UINT8 UserPortState);
Parameters Description
hReader Handle to the reader returned by AC_Open()
pUserPortState Contains the port state to write (only bit 2 and bit 6
are used)
Return Value INT16 Result code. 0 means success.
Table 14 : ACR120_WriteUserPort Command Description
Low Level Frame Structure:
Command: From PC to Reader (6 bytes)
Command Code
(1 byte)
Command Data Length
(1 bytes)
Instruction Code
(1 byte)
Data Length
(1 byte)
Data
(1 byte)
E0h 03h 15h 01h UserPortState
Response: From Reader to PC (6 bytes) << Success or Fail >>
Response Code
(1 byte)
Response Status
(2 bytes)
Response Data Length
(2 bytes)
Response Data
(1 byte)
E1h INT16 0001h UserPortStateStored
Note: The Response Data (UserPortStateStored) is used for comparison only.
UserPortState:
Bit 0-1: Not Used
Bit 2: Buzzer (0 = OFF; 1 = ON)
Bit 3-5: Not Used
Bit 6: LED (0 = OFF; 1 = ON)
Bit 7: Not Used