MagTek USB MagnePrint Swipe Reader with Encryption - Manual (Page 36)

USB MagnePrint Swipe Reader with Encryption
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Example Set USB_SERIAL_NUM property Response (Hex):
Result Code Data Len Data
00 00
Example Get USB_SERIAL_NUM property Request (Hex):
Cmd Num Data Len Prp ID
00 01 01
Example Get USB_SERIAL_NUM property Response (Hex):
Result Code Data Len Prp Value
00 03 31 32 33
POLLING_INTERVAL PROPERTY
Property ID: 2
Property Type: Byte
Length: 1 byte
Get Property: Yes
Set Property: Yes
Default Value: 1 for Keyboard Emulation interface type or 10 (0A hex) for HID interface type
Description: The value is a byte that represents the devices polling interval for the Interrupt
In Endpoint. The value can be set in the range of 1 – 255 and has units of
milliseconds. The polling interval tells the host how often to poll the device
for card data packets. For example, if the polling interval is set to 10, the host
will poll the device for card data packets every 10ms. This property can be
used to speed up or slow down the time it takes to send card data to the host.
The trade-off is that speeding up the card data transfer rate increases the USB
bus bandwidth used by the device, and slowing down the card data transfer
rate decreases the USB bus bandwidth used by the device. The value of this
property will be sent to the host when the host requests the device’s USB
endpoint descriptor.
This property is stored in non-volatile memory, so it will persist when the unit
is power cycled. When this property is changed, the unit must be reset (see
Command Number 2) or power cycled to have these changes take effect. This
device must be unplugged for at least 30 seconds to properly power cycle it.
Example Set POLLING_INTERVAL property Request (Hex):
Cmd Num Data Len Prp ID Prp Value
01 02 02 0A
Example Set POLLING_INTERVAL property Response (Hex):
Result Code Data Len Data
00 00
Example Get POLLING_INTERVAL property Request (Hex):
Cmd Num Data Len Prp ID
00 01 02