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USB设备
USB设备端固件程序,枚举部分是全部程序的基础和重心,只有主机对设备枚举成功后,主机才能和设备进行正常的通信
USB的枚举过程分为4个状态.
1.接入态
v主机检测到USB设备插上,击活端口,并发送复位命令(保持10ms)
2.默认态
v主机使用默认地址读取设备描述符 (GET_DESCRIPTOR)
v主机分配给设备一个总在线的唯一地址 (SET_ADDRESS)
3.地址态
v主机从新的地址获取设备描述符(GET_DESCRIPTOR)
v主机获取所有设备的配置描述符(GET_DESCRIPTOR)
4.配置态
v主机设置描述符(设备,配置) (SET_CONFIGURATION)
v主机读取配置状态(可选) (GET_CONFIGURATION)
v主机读取接口状态(可选) (GET_INTERFACE)
-USB device-side firmware, enumerate all part of the foundation and focus of the procedure, only the host of equipment after the successful enumeration, the host and equipment in order to engage in normal communication USB enumeration process is divided into four status. 1. Access state v host detected USB devices plug in, hit live ports, and send the reset command (to maintain 10ms) 2. default state v Use the default address of the host to read device descriptor (GET_DESCRIPTOR) v host assigned to the equipment of a total online only Address (SET_ADDRESS) 3. A
- 2022-01-21 17:52:38下载
- 积分:1
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OSR的USB FX2学习套件usbfx2lk WDM驱动
USBFX2LK WDM drive for OSR s USB FX2 Learning Kit
- 2022-12-27 07:10:03下载
- 积分:1
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usb温度控制器HOST
usb温度控制器HOST-usb temperature controller HOST
- 2022-06-18 13:11:01下载
- 积分:1
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CYPRESS CY7C69013A使用的驱动!
CYPRESS CY7C69013A使用的驱动!-CYPRESS CY7C69013A driver to use!
- 2022-11-26 10:25:03下载
- 积分:1
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usb 访问HID设备的源码 可以访问HID设备(除鼠标,键盘被系统占用)...
usb 访问HID设备的源码 可以访问HID设备(除鼠标,键盘被系统占用)-usb access sound code of HID device ,can access HID device(except mouse and keyboard are occured with system )
- 2022-08-20 10:35:23下载
- 积分:1
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bc05此文件可以通过USB接口修改userkey中的设定值…
本文档可以通过修改USB接口的用户密钥设置,可以作为生产使用
- 2022-02-05 17:27:27下载
- 积分:1
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Cypress USB firmware procedures, the development of learning USB2.0
一些Cypress公司USB2.0固件程序,学习USB2.0开发-Cypress USB firmware procedures, the development of learning USB2.0
- 2022-03-31 08:00:05下载
- 积分:1
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STC89C55+STA013+CH375设计读U盘(已经通过)/硬盘(还没调试,也放上来)的MP3播放器,支持歌曲的选择,歌词的显示等等的完整源代码(KEIL...
STC89C55+STA013+CH375设计读U盘(已经通过)/硬盘(还没调试,也放上来)的MP3播放器,支持歌曲的选择,歌词的显示等等的完整源代码(KEIL编译)及硬件(SCH/PCB),可以直接使用-STC89C55+ STA013+ CH375 design read U disk (has passed)/hard disk (not debugging, but also放上来) of MP3 players, support the choice of songs, lyrics display, etc. The complete source code (KEIL compiler) and hardware ( SCH/PCB), can be directly used
- 2022-07-02 16:59:06下载
- 积分:1
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CH375 是一个USB总线的通用接口芯片,支持USB
CH375 是一个USB总线的通用接口芯片,支持USB-HOST主机方式和USB-DEVICE/SLAVE 设备方式。-CH375 is a common USB bus interface chip to support USB-HOST host of ways and means USB-DEVICE/SLAVE equipment.
- 2023-07-19 11:50:02下载
- 积分:1
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USB的设计参考
usb design reference
- 2022-01-26 07:56:14下载
- 积分:1