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Structure
Flash, the internal storage medium of an electronic disk, is the fastest-growing storage chip in recent years. It features E2PROM erasability and cheap EPROM, it is a high-performance, low-power, electrically erasable memory device. Based on the above features, electronic disks have been widely used in information storage, set-top boxes, network computing, embedded computers, and other fields.
The relationship between Linux device driver and the whole hardware system1, the classification and characteristics of equipmentThe hardware of a computer system is mainly composed of CPU, memory and peripherals.With the development of IC (Integrated circuit) production process, the chip integration is more and more high, often in the CPU internal integrated memory and peripheral adapter.The
In addition to network devices, character devices and block devices are mapped to file system files and directories through the file system's APIOpen (), close, write (), read (), and other accessible character devices and block devices.A block device is more complex than a character device, where a disk/flash file system, such as Ext3, is first created, and thes
Linux Device Driver Model: My Understanding of xxxx_coreFor Linux, some commonly used device drivers, such as codec, UART, and I2C, all have a xxxx_coreProgramImplementation, such as serial_core. What kind of structure is this? In fact, this provides a general principle implementation mechanism. For example, if you want to access the Internet, you don't need to c
When learning Linux device driver, the first step is to build the kernel tree, first download the Linux kernel, according to the author of Linux Device dervier 3, as long as the linux-2.6.xxx kernel can be, I am a linux-2.6.30.4.Procedure:(1) download the kernel source package, and unzip: [root @ Yanbo kerneltest] # tar-zxvf linux-2.6.30.4.tar.gz(2) [root @ Yanbo
After reading chapter 1, I will go back to some knowledge points of chapter 5, chapter 5, and Chapter 7. This chapter mainly describes the registration, cancellation, activation, and prohibition of registration of devices.
When is the device registered?
1) when the driver is loaded (registration at startup of the statically compiled kernel, registration at loading of the dynamic module)
2) When a hot swappi
The most important feature of Windows 8 is the new interface and new interface application, and the hardware device driver can be installed and used smoothly in the new interface. The specific methods are as follows:
The first step: the mouse to move to the right or lower right corner, in the sidebar click "Settings."
Step two: In Settings, click Change Computer Settings at the bottom.
network;(4) The MAC module notifies the DMA module to fetch data;(5) The DMA module pulls the appropriate BD from the BD table;(6) The MAC module sends the data to the current BD corresponding cache;(7) The network device notifies the processor to start receiving data (in the form of interrupts or polling);(8) The protocol layer takes the data out of the current
Linux device driversLinux device drivers exist as kernel modules for Linux in Linux. Kernel modules can dynamically scale the system while the system is running. So, we can dynamically install or unload modules in user space, using Insmod and Rmmod.There are a lot of devices in the real world, which vary in electrical characteristics and I/O methods. To simplify the work of
processor initializes the network device;(3) The MAC module receives data from the network;(4) The MAC module notifies the DMA module to fetch data;(5) The DMA module pulls the appropriate BD from the BD table;(6) The MAC module sends the data to the current BD corresponding cache;(7) The network
(netdev_post_init, Dev);
ret = Notifier_to_errno (ret);
if (ret)
Goto Err_uninit;
ret = call_netdevice_notifiers (netdev_register, Dev);
ret = Notifier_to_errno (ret);
if (ret) {
rollback_registered (Dev);
Dev->reg_state = netreg_unregistered;
}
3.7, create the network device in the Sysfs file system of the entrance[CPP]View PlainCopy
ret = Netdev_reg
On Linux, the network is divided into two tiers, each of which is the network stack protocol support layer, and the device driver layer that receives and sends the network protocol.The network stack is a separate part of the hardw
Although there are already many Linux device-driven development learning articles and blogs on the network, there are many classic Linux devices that drive openHair of the books, writing these posts seems to be of little significance, but the learning process, learning experience recorded, on the one hand has strengthened and consolidatedMeaning, on the other hand, is one of the necessary ways to turn what
[Tutorial on industrial serial port and network software communication platform (SuperIO)] 7. Secondary Development Service driver, network software superioSuperIO data download: Role of http://pan.baidu.com/s/1pJ7lZWf1.1 Service Interface
The data collected by the device driver
Source: qiuyi21.cnblogs.com1 , download the latest official version of the driverOn Broadcom official website http://www.broadcom.com/support/ethernet_nic/downloaddrivers.php Download the latest official version of the driver for your network card, do not download the beta version.2 , delete the system's own driver cacheAt the same time press the WIN + x appear m
of Ethernet is mainly Ethernet II, Ethernet 802.3raw, Ethernet802.3sap, Ethernet802.3snapThe Ethernet controller implements the MAC layer function and must be used in conjunction with the PHY (physical layer transceiver), which is related to the OSI Data link layer, which implements the physical layer functionality. The MII (Media agnostic Interface) is a standard interface for connecting Fast Ethernet Mac and PHY, and the Ethernet device
variable in Linux, representing the time. Its unit varies with the hardware platform.A constant Hz is defined in the system, representing the number of minimum time intervals per second. In this way, the unit of jiffiesIt is 1/Hz. Jiffies on Intel is measured in 1/100 seconds, which is the minimum time that can be distinguished by the system.Interval. Therefore, expires/Hz is the cycle of the clock in seconds.Function is the callback function after the time is reached. Its parameter is data in
Tags: important contex ICA mod options map kernel variable EALLinux network devices are different from character devices and block devices, and no files correspond to network devices. The application operates the network device through the socket.The network
in Linux, the network is divided into two tiers, namely the Network Stack protocol support layer, and the device driver layer that receives and sends the network protocol. Network stack is a separate part of hardware, mainly used
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