What is iclass in the registry used? -- Trueman_onlyme

Source: http://topic.csdn.net/u/20090923/21/a4430689-f060-4ab5-86be-2ecb9a631418.html
If bsp_noi2c!
; I2C bus driver
[HKEY_LOCAL_MACHINE \ drivers \ builtin \ I2C]
"Prefix" = "I2C"
"DLL" = "I2C. dll"
"Order" = DWORD: 0
"Index" = DWORD: 0
"Mode" = DWORD: 1; Mode: 0 = polling, 1 = interrupt
"Slaveaddress" = DWORD: 0; bus driver's slave address
"Friendlyname" = "I2C bus driver"
"Iclass" = "{A32942B7-920C-486b-B0E6-92A702A99B35}"; power-manageable generic
Endif bsp_noi2c!

"Valuename" = "value type"

Valuename is used to read this variable in the driver through registry operations, so configuration is implemented.
---- Can it be customized? Several commonly used device.exe calls

If bsp_noi2c! What does it mean?
Is bsp_noi2c 0, read the following key value?

1. iclass indicates the category of the current device. In ce5.0, there are four categories of devices, including Block devices, network devices, and some GWES devices, the fourth one is unclear,
For a device that does not define iclass or iclass does not belong to the above four types of devices, the system uses it as the default device.
2. It will affect PM management. If no configuration is available, the system will manage it by default. At this time, it may
Issues.

For if bsp_noi2c! What does it mean? Congratulations! It's your understanding.

The driver declaration provided by wince is that there are four guids that support power management, representing the four peripheral types. Is fixed.
For details, refer to common. Reg.
; Power Manager interfaces. These list the interface classes that the power
; Manager will monitor for new devices.
;
[HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ power \ Interfaces]
"{A32942B7-920C-486b-B0E6-92A702A99B35}" = "Generic Power-manageable devices"
"{8dd679ce-8ab4-43c8-a14a-ea4963faa715}" = "power-manageable Block devices"
; @ Cesysgen if ce_modules_ndis
"{98c5250d-c29a-4985-ae5f-afe5425e5006}" = "power-manageable NDIS miniports"
; @ Cesysgen endif ce_modules_ndis
; @ Cesysgen if ce_modules_gwes
"{EB91C7C9-8BF6-4a2d-9AB8-69724EED97D1}" = "power-manageable display"
; @ Cesysgen endif ce_modules_gwes