readme.txt

来自「at91sam7s64下的usb调试程序」· 文本 代码 · 共 68 行

AT91 SAM7 Basic USB Project

	  The goal of this demonstration project is to demonstrate how to use the AT91 ARM-Based 
	Software Package. This project runs a test of the AT91SAM7Sxx device and his corresponding
	Evaluation Kit, the AT91SAM7Sxx-EK. This project implements a USB communication using the 
	on-chip USB device with a PC application.

Install 

	  Please copy atmusb6124.inf in the following windows directory C:\WINxx\inf directory and 
	atmusb6124.sys in the following windows directory C:\WINxx\system32\drivers directory. When
	the USB device is connected for the first time, the PC host asks for a driver installation 
	file (.inf file). atmusb6124.sys driver will be associated to this device. The BasicUSB_6124.exe
	PC application is then ready to communicate:

	C:\ BasicUSB_6124.exe

	This will transmit buffer every second to each connected device.

Quick description

	This device uses 3 pipes associated with physical endpoints:
	·         EP0 Control endpoint
	·         EP1 Bulk IN endpoint
	·         EP2 Bulk Out endpoint

During the initialization, 

	·         The peripheral clock must be enabled for the USB device and the 48MHz PLL USB clock.
	·         Pipe objects are then initialized and the dispatch routine is associated with the 
		   control pipe
	·         The pull-up on USB DP line is finally activated


Once the device is plugged and the enumeration phase completed, the application reads data from the USB
host and sends back a packet through the DBGU. After ten seconds with any connected device found, the
PC application stops sending packet.


DBGU Trace

-I- BasicUSB

0)      Set Pull-UP 1) Clear Pull UP

(Start PC application)

-I- Len 41

-I- Len 322

-I- Len 659

-I- Len 941

-I- Len 844

-I- Len 160

-I- Len 396

-I- Len 93

-I- Len 258

…