linux driver development pdf

First on the code:#include The Linux driver can accept parameters when initializing, the command is as follows: Insmod Hello.ko howmany=10 whom= "Daddy"Here 2 parameters are passed, Howmany and whom respectively.In order for the module to be able to receive these two parameters:1. Contains the header file moduleparam.h, this header file defines what the parameters need.2. Declare the parameters. Several typ

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 han

1 DMA ConceptsDMA as the name implies refers to the device and memory, memory and external storage devices for direct data read and write operations, without the need for CPU participation. 2 DMA PrincipleDMA transfer needs to be performed by DMA controller DMAC, when DMA transfer is required, the DMA controller emits a request to occupy the bus, and when the CPU responds to the DMA request, it temporarily abandons the control of the bus, and when the DMA transfer is over, Dmac sends the end com

There are a total of 32. h header files in the header file directory. There are 13 in the main directory, 4 in the ASM subdirectory, 10 in the Linux subdirectory, and 5 in the SYS subdirectory. The respective functions of these header files are as follows:1. Home Directory2. Architecture Related header Files subdirectory include/asmThese header files primarily define data structures, macro functions, and variables that are closely related to the CPU a

Starting with this chapter, all the basic concepts of module and kernel programming are introduced and a complete module is written to practice these basic overviewsRead.3.1 Building a test environmentSince all test codes are based on the Ubuntu 14.04.2 Desktop 3.16.0-30-generic Core, it is best toLinux official website to download a copy of the source code for this version of the kernel. In addition, it is recommended to install your Ubuntu desktop environment inside the virtual machine, whichH

3.2.7 Error Handling #include Http://www.cnblogs.com/snake-hand/p/3184709.htmlProficient in Linux device driver development notes

Android system transplantation and driver development-Chapter 7-LED driver and android driver development Implementation principle of LED Driver Write LED driver: Before testing the LE

Development Kit (commercial)14,diffpdfPDF diff Tool15,pdfslidePDF Slide Show Tool16,pdfcubePdfcube is a PDF reader based on the development of OpenGL17,pdfresurrectPdfresurrect is a tool designed to analyze PDF files. The PDF format can change files in previous files that r

Development Kit (commercial)14,diffpdfPDF diff Tool15,pdfslidePDF Slide Show Tool16,pdfcubePdfcube is a PDF reader based on the development of OpenGL17,pdfresurrectPdfresurrect is a tool designed to analyze PDF files. The PDF format can change files in previous files that r

Android Deep Exploration ( volume 1) HAL with Drive Development Chapter I Android system porting and driving development Overview reading notesThis chapter isAndroidsystem porting and Driver development Overview of the specific explanation. First,Androidis divided into four layers of architecture. At the bottom of it i

The MQ-2 Smoke gas sensor module is driven on the X210v3 Development Board.It is now necessary to drive a MQ-2 smoke gas sensor module. After detecting smoke exceeding a certain standard, it will return a different level, similar to the key driver.But when writing the driver, you need to use the Gph2_3 number PIN. However, the Ioremap address is then configured in the kernel, and it is not possible to contr

Continue to drive learning based on the progress of the previous article ....... Main references: http://blog.csdn.net/dg1683wen/article/details/6861044 First, build the kernel source code tree. I am using the friendly arm comes with Linux source code: linux-2.6.35.7-20120912.tgz First copy the kernel source code linux-2.6.35.7-20120912.tgz to the Ubuntu system d

In the previous blog post, we have learned how to coordinate how each level in the whole system works, and the command issued by the application layer reaches the drive layer under the kernel, thus achieving the purpose of operating the hardware layer.Let's look at the code in the final molded "shell driver" first_drv.c in the last blog post:#include As I said in my previous blog post, there is a disadvantage to this

The driver can be compiled together with the kernel or separately as a module. However, to facilitate driver debugging, the driver is usually compiled in a modular manner. 1. Compile the driver in modular Mode The Linux kernel is 2.6.12 and the fl2440

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size of all device descriptors behind 4, know the remaining device descriptor size, you can read the remaining device descriptors 5. Then put the device into the Usb_bus_type's dev link list 6. Remove the Usb_bus_type from the driver list Usb_driver 7, the Usb_interface and usb_driver of the id_table comparison (for the USB mouse is the ultimate comparison of the interface descriptor under the Binterfaceclass;binterfacesubclass; Binterfaceprotocol; t

", 0x50) . Platform_data = AT24C08, } ;Because there may be multiple I2C devices, keep them in an array. Then use the I2c_register_board_info function to register the array of our defined I2C devices into the Linux kernel: I2c_register_board_info (0, Mini2440_i2c_devices, array_size (mini2440_i2_devices)); So where to register this I2C device. Typically in the system initialization of the Developm