Testing USB Device Drivers

... transfer. Writing USB Device Drivers This section describes how to write device drivers for USB devices running on Windows CE. USB device drivers exist to make the services of peripheral devices available ... to assist in testing USB scenarios. These are the methods used at Microsoft to test the USB system software for Windows CE. Further details on testing a USB s...

Ngày tải lên: 07/10/2013, 00:20

... the USBD module uses to search for USB device drivers. In the descriptions, GroupX_ID refers to a key with the specified group set to one of the forms described in Registry Keys for USB Device Drivers ... information on allowable forms, see Registry Keys for USB Device Drivers. 3. The USBD module searches for a device class-specific driver. Class-specific drivers are ident...

Ngày tải lên: 07/10/2013, 00:20

... the different device drivers concepts are introduced. Events User functions Kernel functions Load module Open device Read device Write device Close device Remove module Table 1. Device driver ... Events User functions Kernel functions Load module insmod Open device Read device Write device Close device Remove module rmmod Table 3. Device driver events and their associa...

Ngày tải lên: 23/10/2013, 22:15

... Functions UsbIsr Utilities USB Controller Hardware UsbWriteUsbReadUsbCloseUsbOpen UsbIoctlUSB HW/SW Initialize Functions Context of Callback Message Queue USB_ read USB_ write USB_ ioctl UsbDevCreate USB_ open USB_ close Driver ... Embedded USB Device Architecture of an Embedded USB Device ? ? USB Device Driver Architecture USB Device Driver Architecture ? ? Case Study...

Ngày tải lên: 13/12/2013, 00:15

... the different device drivers concepts are introduced. Events User functions Kernel functions Load module Open device Read device Write device Close device Remove module Table 1. Device driver ... module_init() Open device fopen file_operations: open Read device fread file_operations: read Write device Close device fclose file_operations: release Remove modules rmmod modu...

Ngày tải lên: 13/12/2013, 11:15

... independent of the devices attached to the SCSI cable. Other classes of device drivers have been added to the kernel in recent times, including USB drivers, FireWire drivers, and I2O drivers. In ... the process of writing such drivers. In addition to device drivers, other functionalities, both hardware and software, are modularized in the kernel. Beyond device drivers, fi...

Ngày tải lên: 24/12/2013, 01:17

... to Device Drivers& quot;. #define MODULE #include <linux/module.h> buffer-based graphics environments, where the X server acts only as a server based on a real kernel-space device ... users.  The most important devices can't be handled in user space, including, but not limited to, network interfaces and block devices. As you see, user-space drivers can't do...

Ngày tải lên: 24/12/2013, 01:17

... /dev/$ {device} [0-3] major=`awk "\\$2==\"$module\" {print \\$1}" /proc/devices` mknod /dev/$ {device} 0 c $major 0 mknod /dev/$ {device} 1 c $major 1 mknod /dev/$ {device} 2 ... random-access device, one device or many, and so on. To make scull be useful as a template for writing real drivers for real devices, we'll show you how to implement several...

Ngày tải lên: 24/12/2013, 01:17

... limit; i++) { Scull_Dev *d = &scull_devices[i]; if (down_interruptible(&d->sem)) return -ERESTARTSYS; len += sprintf(buf+len,"\nDevice %i: qset %i, q %i, sz %li\n", ... related to serious hardware or software failures. KERN_ERR Used to report error conditions; device drivers will often use KERN_ERR to report hardware difficulties. } This is a fairly ty...

Ngày tải lên: 24/12/2013, 01:17

... same device. Different device files will, for example, cause the drive to record with or without compression, or to automatically rewind the tape when the device is closed. Cloning the Device ... virtual device for each user, while using a pid key creates a new device for each process accessing it. The decision to use the controlling terminal is meant to enable easy testing...

Ngày tải lên: 24/12/2013, 01:17