Device Table#
The collection of devices governed by a controller is referred to as a device table. The controller is responsible for creating this aggregate and sending it to the computer following a reset. The table consists of an addressed list of device descriptors.
Address |
ID |
Version |
Read Sample Size (bytes) |
Write Sample Size (bytes) |
|---|---|---|---|---|
0.0.0 |
0.0.12 |
1.0 |
8 |
0 |
0.0.1 |
0.0.27 |
2.0 |
26 |
8 |
0.1.0 |
0.0.12 |
1.0 |
8 |
0 |
Device Address#
Each device descriptor entry in the device table requires a device address. This is a unique, 32-bit number with the following format:
Reserved(16-bit).Hub_Index(8-bit).Device_Index(8-bit)
Reserved: Reserved bits. Must be all zeros.Hub_Index: The index of the hub within the controller that the device is managed by.Device_Index: A unique index of each device within its hub. A validDevice_Indexranges from 0 to 0xFD. 0xFE is reserved and 0xFF indicates an invalid device.