User guide

USB HID Keyboard Emulation Swipe Reader

RESULT CODE

This one-byte field contains the value of the result code. There are two types of result codes:

generic result codes and command-specific result codes. Generic result codes always have the

most significant bit set to zero. Generic result codes have the same meaning for all commands

and can be used by any command. Command-specific result codes always have the most

significant bit set to one. Command-specific result codes are defined by the command that uses

them. The same code can have different meanings for different commands. Command-specific

result codes are defined in the documentation for the command that uses them. Generic result

codes are defined in the following table.

Value Result Code Description

0 SUCCESS The command completed successfully.

1 FAILURE The command failed.

2 BAD_PARAMETER The command failed due to a bad

parameter or command syntax error.

GET AND SET PROPERTY COMMANDS

The Get Property command gets a property from the device. The Get Property command

number is 0.

The Set Property command sets a property in the device. The Set Property command number

is 1.

The Get and Set Property command data fields for the requests and responses are structured as

follows:

Get Property Request Data:

Data Offset Value

0 Property ID

Get Property Response Data:

Data Offset Value

0 – n Property Value

Set Property Request Data:

Data Offset Value

0 Property ID

1 – n Property Value

Set Property Response Data:

None

The result codes for the Get and Set Property commands can be any of the codes list in the

generic result code table.