biometric driver

Label:SQL2000 installation failed, [ODBC Driver Manager] No data source found, see log file for more information(2010-09-13 17:38:18) reproduced Recently installed the database SQL server2000 when installed to the end of the time, to jump out of the "SQL2000 installation failed, [ODBC driver Manager] did not find the data source, more information please view the log file" prompt, a little sure to close, fi

processor can be considered as peripherals compared with the ARM core, after successful registration, the ldd0 directory appears in the SYS/Device directory. If (RET) Printk (kern_notice "unable to register LDD/N "); Printk (kern_notice "Mount ldw. OK! /Nbus device is ldd0! /Nyou can see me in sys/module/, sys/devices/and sys/bus /!/N "); Return ret; } Static void ldd_bus_exit (void) { Device_unregister ( ldd_bus ); Bus_unregister ( ldd_bus_type ); } Module_init (ldd_bus_init ); Module_exit

Access to the character device is performed through the device name in the file system. Those device names are simply nodes that are called file system trees, and they are typically located in the/dev directory. Device files for character device drivers can be identified by ' C ' in the first column of the ls-l command output. Block devices are also located in/dev, identified by the character ' B 'CRW-RW----1 root root 253, 0 2013-09-11 20:33 Usbmon0CRW-RW----1 root root 253, 1 2013-09-11 20:33

Access to the character device is done through the device name in the file system. Those device names are simply nodes that are called file system trees, and they are typically located in the/dev folder.Device files for character device drivers can be identified by ' C ' in the first column of the ls-l command output. Block devices are the same in/dev, identified by the character ' B ' crw-rw----1 root root 253, 0 2013-09-11 20:33 usbmon0 CRW-RW----1 root root 253, 1 2013-09-11 20:33 usbmo

A new device driver model-platform (platform) device driver, platform device driver (platform_device) and platform driver (Platform_driver) is introduced into the Linux2.6 kernel, The introduction of platform devices makes Linux device drivers more portable.First, platform equipmentPlatform Device structure:1 structPla

Original URL: http://www.cnblogs.com/geneil/archive/2011/12/03/2272869.htmlfirst, the Linux system divides the device into 3 categories: Character device, block device, network device. Using drivers:1, character device : Refers to a byte can only one byte read and write devices, can not randomly read the device memory of a certain data, read data need to follow the data. The character device is a stream-oriented device, and the common character devices are mouse, keyboard, serial port, console a

In the Linux device driver first: Introduction to the device driver briefly describes the character driver, this article briefly describes how to write a simple character device driver. This article draws on the source code in the LDD, realizes a hardware device-independent character device

Part of this article refers to the blog from Droidphone (http://blog.csdn.net/droidphone/article/details/6271122), about Alsa writing a very good article, just a few examples. This article is a combination of examples to analyze the ALSA audio driver.Development environment: ubuntu10.04Target board: linux-2.6.37 (view Linux kernel information via command uname-r)Compiler: arm-none-linux-gnueabi-(None on behalf of compiler creator, such as: FSL for Freescale, the kernel to talk about Eabi,oabi, i

Access to the character device is performed through the device name in the file system. Those device names are simply nodes that are called file system trees, and they are typically located in the/dev directory. Device files for character device drivers can be identified by ' C ' in the first column of the ls-l command output. Block devices are also located in/dev, identified by the character ' B 'CRW-RW----1 root root 253, 0 2013-09-11 20:33 Usbmon0CRW-RW----1 root root 253, 1 2013-09-11 20:33

In the Linux device driver first: Introduction to the device driver briefly describes the character driver, this article briefly describes how to write a simple character device driver. This article draws on the source code in the LDD, realizes a hardware device-independent character device

Linux under the I2C-driven loading process, divided into I2C equipment layer, I2C adapter layer and I2C core layer The I2C device driver layer is the drive we write for a particular I2C device, and the following is the I2C-driven registration process I understand. In the I2C device driver we write, we call I2c_add_driver () to start I2C device-driven registration, which calls I2c_register_driver Complete a

Algorithm (i) has introduced a small area fingerprint identification algorithm optional scheme, is a classic scheme, for the area is large enough and the Level2 feature is higher than the minimum limit, is a low memory occupancy, a fast

1. Overviewin general, the 2.6 kernel has been initialized and mounted with a platform bus in the Sysfs file system. So when we write the platform model driver, we need to do two jobs:1: Implement platform Drive 2: Implement PLATForm Device, however There are many other small tasks that need to be implemented in the process of implementing these two tasks, as described later. The core architecture of the platform model-driven implementation process

host, only one device can communicate with the host at the same time. Manage the external USB device via the USB host controller. USB controller is actually composed of USB controller hardware +USB Controller software. The USB host controller is divided into 3 kinds: UHCI, OHCI, EHCI. UHCI and OHCI Support USB1.1 protocol; EHCI supports USB2.0 protocol. UHCI, its hardware is simple, so the software is relatively complex, and OHCI, its hardware has more performance, contrary to the software to

The Linux kernel is highly customizable and can be customized by configuring the compilation options.When configuring the kernel compilation option, there are generally three compiler options for the driver, not compiling, compiling kernel-driven, and compiling to module-driven. So Linux drivers are generally divided into two categories, kernel-driven and module-driven, of course, there is no absolute difference between the two; when compiled into ker

This section describes the Linux Device Driver framework, driver configuration files, and common methods for loading drivers. It also describes how Red Hat Linux installer loads drivers, we can put the driver into the boot disk by ourselves; after installing the system, we can use kudzu to automatically configure the hardware program. 　　Linux Device

1. Device Driver. In the Linux device model, the device driver is represented by the device_driver structure. Struct device_driver {const char * Name;/* name */struct bus_type * bus;/* attached bus */struct module * owner; const struct of_device_id * of_match_table; INT (* probe) (struct device * Dev);/* call */INT (* remove) (struct device * Dev) when the device matches the