MagTek P-SERIES USB - Manual (Page 30)

P-Series USB Insertion Reader
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Example Get MSR Direction property Response (Hex):
Result Code Data Len Prp Value
00 01 02
CARD INSERTED PROPERTY
Property ID:
4
Property Type: Byte
Length: 1 byte
Get Property: Yes
Set Property: No
Default Value: None
Description: This value is used to determine if a card is fully inserted into the device.
If a card is fully inserted into the device this property will contain one. If not, the property will
contain zero. This property is intended to be used by hosts that want to check if a card is
currently inserted in the device during startup. This card inserted information is also contained
in the Card Status field of the Input report sent to the host during each card swipe. So there
should be no need to poll the host for this information on a continuing basis. Examples follow:
Example Get Card Inserted property Request (Hex):
Cmd Num Data Len Prp ID
00 01 04
Example Get Card Inserted property Response (Hex):
Result Code Data Len Prp Value
00 01 01
MAX PACKET SIZE PROPERTY
Property ID:
5
Property Type: Byte
Length: 1 byte
Get Property: Yes
Set Property: Yes
Default Value: 32
Description: The value is a byte that represents the devices maximum packet size for
the Interrupt In Endpoint. The value can be set in the range of 1 – 64 and has units of bytes. The
maximum packet size tells the host the maximum size of the Interrupt In Endpoint packets. For
example, if the maximum packet size is set to 32, the device will send HID reports in multiple
packets of 32 bytes each or less for the last packet of the report. This property can be used to
speed up or slow down the time it takes to send card data to the host. Larger packet sizes speed
up communications and smaller packet sizes slow down communications. 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.
This property is stored in non-volatile EEPROM memory so it will not change when the unit is
power cycled. The value of this property will be sent to the host when the host requests the
device’s USB endpoint descriptor. When this property is changed, the unit must be power