module 4 drivers ed

1. Get the kernel version When the device driver needs to support different kernel versions at the same time, in the compilation phase, the kernel module needs to know the version of the currently used kernel source code to use the corresponding kernel API. In the 2.4 and 2.6 kernels, the source code header file Linux/version. H is defined as follows: Linux_version_code: the binary representation of the kernel version. Each of the primary, slave, and

created. Use an appropriate file system function (usually ext2_read_inode () or ext3_read_inode () to read the corresponding index node on the disk to initialize the index Node object. When this function is used to determine the disk index node and the device file, it calls init_special_inode (). This function initializes the I _rdev field of the index Node object to the master and secondary device numbers of the device file, set the I _fop field of the index Node object to the address of the o

[Tutorial on industrial serial port and network software communication platform (SuperIO)] 4. Develop device drivers and network software superioSuperIO-related information download: http://pan.baidu.com/s/1pJ7lZWf1.1 Development Preparation Copy all files in the "Development Kit" to the "bin" directory of the project, or a dedicated generated directory under the project. The Development Kit files include:

Compile the JNI method for the hardware abstraction layer (HAL) module of Android in Ubuntu to provide the Java access hardware service interface (Lao Luo study note 4), androidjni In the last two articles, we introduced how to write drivers for Android hardware, including how to implement kernel drivers in Linux kerne

Compile the JNI method for the hardware abstraction layer (HAL) module of Android in Ubuntu to provide the Java access hardware service interface (Lao Luo study note 4), androidjni In the last two articles, we introduced how to write drivers for Android hardware, including how to implement kernel drivers in Linux kerne

This article is the second reading note of chapter 3 Char Drivers in Linux Device Drivers. This part is difficult to understand. I went online to check and couldn't find the Example in this book, so I decided to rely on myself. I will first write an application layer example to trigger some operations on the kernel module through this example, which is easier to