2015年8月6日
USB2.0 速度识别--区分低速-高速-全速
摘要： USB2.0是向下兼容USB1.X的，即USB2.0支持高速，全速，低速的USB设备（HIGH-SPEED,FULL-SPEED,LOW-SPEED），而USB1.X不支持高速设备。因此如果高速设备接在USB1.X的hub上，也只能工作在全速状态。因此对速度的识别是很重要的，否则没办法以想要的速度通... 阅读全文
posted @ 2015-08-06 23:09 IAmAProgrammer 阅读(8809) 评论(0) 推荐(0) 编辑
STM32 USB FS Core and USB OTG Core
摘要： STM32 USB-FS-Device development kitCompatible with theSTM32F102xx and STM32F103xx series,STM32 L1 Ultra Low Power,STM32 F3 SeriesUSB On-The-Go host an... 阅读全文
posted @ 2015-08-06 18:19 IAmAProgrammer 阅读(1301) 评论(0) 推荐(0) 编辑
STM32F4, USB HS with ULPI and Suspend/Wakeup
摘要： Hi guys,I am in need of your help, unfortunately STs documentation is lacking some information here.I am basically trying to implement a USB device (C... 阅读全文
posted @ 2015-08-06 17:11 IAmAProgrammer 阅读(3289) 评论(0) 推荐(0) 编辑
embOS实时操作系统 - 任务状态
摘要： A task may be in one of several states at any given time. When a task is created, it isplaced into the READY state.A task in the READY state is activa... 阅读全文
posted @ 2015-08-06 11:11 IAmAProgrammer 阅读(712) 评论(0) 推荐(0) 编辑