The USB report has two formats, depending on if boot or report protocol is enabled. The following format isthe boot protocol and is understood by a USB aware BIOS.
Bit 7
Byte 0Byte1Byte2
0XY
0XY
0XY
0XY
0XY
MiddleXY
RightXY
Bit 0LeftXY
The following is the USB report protocol format and allows the additional wheel movement information in the fourth byte. When the wheel is moved forward the fourth byte reports a 0x01, and when moved backward the fourth byte reports 0xFF. When the wheel is idle, then this byte is assigned 0x00.
Bit 7
Byte 0Byte1Byte2
Byte3
0XYR
0XYR
0XYR
0XYR
0XYR
MiddleXYR
RightXYR
Bit 0LeftXYF/R
百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读,免费范文网,提供经典小说教育文库Designing a low cost CY7C63723 combination mouse(18)在线全文阅读。
相关推荐: