USB HID IntelliHead Swipe Reader
POLLING_INTERVAL PROPERTY
Property ID: | 0x02 |
Property Type: | Byte |
Length: | 1 byte |
Get Property: | Yes |
Set Property: | Yes |
Default Value: | 10 |
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 |
| 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, if any, will be sent to the host when the host requests the device’s |
| USB endpoint descriptor. |
| This property is stored in |
| 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. |
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 |
Example Get Polling Interval property Response (Hex):
Result Code | Data Len | Prp Value |
00 | 01 | 0A |
18
