Polling Interval Property; Track Data Send Flags Property - Magtek MICRSAFE Technical Reference Manual

POLLING INTERVAL PROPERTY

Property ID: 2
Property Type: Byte
Length: 1 byte
Get Property: Yes
Set Property: Yes
Default Value: 1
Description: The value is a byte that represents the device's 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 keystroke data packets. For example, if the polling interval is set to
10, the host will poll the device for keystroke data packets every 10ms. This
property can be used to speed up or slow down the time it takes to send
keystroke 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 for these changes to take effect.
Example Set Polling Interval property Request (Hex):
Cmd Num
01
Example Set Polling Interval property Response (Hex):
Result Code
00
Example Get Polling Interval property Request (Hex):
Cmd Num
00
Example Get Polling Interval property Response (Hex):
Result Code
00

TRACK DATA SEND FLAGS PROPERTY

Property ID: 4
Property Type: Byte
Length: 1 byte
Get Property: Yes
Set Property: Yes
Default Value: 0x00
Data Len Prp ID
02 02
Data Len Data
00
Data Len Prp ID
01 02
Data Len Prp Value
01 0A
Section 5. USB Communications
Prp Value
0A
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