install device driver

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 control the GPIO or enter the interrupt.It was lat

/******************** * Character device driver ********************/ (1) Character device driver Introduction A character device is a device that is accessed by a byte stream and is called a character

LDD folder appears in/sys/bus, which contains two directories: devices and drivers */If (RET) return ret; If (bus_create_file ( ldd_bus_type, bus_attr_version )) /* Add the bus attribute. The version attribute file */printk (kern_notice "unable to create version attribute will appear in the/sys/bus/LDD directory! \ N "); ret = device_register ( ldd_bus);/* register the bus as a device. Because the bus can also be a

If I can't accompany you to the end Do you regret that we were holding hands If I hadn't met you Now, I Where to stay All love is an adventure. That would be willingly. Waiting for all the suspense in our lives My passionately devoted lover. She's my lover. The love she gave me was like The morning with the dew How I want to give her my true My dearly Beloved. I want to be lonely for her Like the night is deep This chapte

0. Preface　　Graduate life all are on the right track, I also started a new study, because really do not want to make storage, so decided to study with the elder brother device driver, read the book two weeks, finally a little clue, began to record it!1. Preparatory workA) View the kernel versionUname-rb) Install kernel source tree (http://www.cnblogs.com/Jezze/ar

First, we know that the driver is part of the kernel, so what role does the driver play in the kernel?The role of the device driver in the kernel: they are separate "black boxes" that enable a particular hardware to respond to a well-defined internal programming interface that completely hides the work details of the

The city I miss is dusk Why do I always passionately devoted to you Once gave me happiness also gave me trauma Once gave me hope and gave me despair I'm in a strange crowd in a faraway city Feel your Distant sorrow My fantasies. Your sorrow, like my despair, so long,,,, this is today's melody, straight into the bottom of my heart ~~~~~~~~~~~~~~~~In the Linux system, the I²c drive consists of 3 parts, namely, the I²c core, the I²c bus drive and the I²C

Linux provides a set of functions to handle the PCI configuration block. Before a PCI device can be used, the Linux driver needs to determine the specific parameters of the device from the information in the PCI device configuration block, making the relevant settings so that the PCI

===============================This article is the original site, welcome to reprint!Reprint please indicate the source: http://www.cnblogs.com/gdt-a20 =============================== The kernel developer will be the bus, device, drive the three are abstracted from the software idea, cleverly established the relationship between the two, make it more visualization. Combined with the knowledge that we have learned before, in general, the relationship b

Kernel 2.6.29.4 USB devices are actually complicated, but the Linux Kernel provides a subsystem called USB core to handle most of the complicated work. Therefore, the interface between the driver and USB core is described here.In the USB device organization structure, there are four layers: device, config, interface, and endpoint.A brief description of these four

From one point of view, the role of a device driver is to provide a mechanism, not a policy.When writing drivers, the program ape should pay particular attention to the following basic concept: When writing kernel code to access hardware, do not impose any specific policy on the user. Because different users have different needs, the driver should handle the prob

Transferred from: http://blog.csdn.net/bonnshore/article/details/7979705Written in the previous words:Bloggers opened a new personal site: You can also see this article here, click to open the linkThis article is a blogger learning Linux drive transplant after a full two weeks through the access to data and some of their own observations to do some of the records, designed as a future review materials, because bloggers have not much experience in the text may appear some fallacy, hope to see the

A new set of driver management and registration mechanisms have been introduced from Linux 2.6:P latform_device and Platform_driver.Most of the device drivers in Linux can use this mechanism, the device is represented by Platform_device, and the driver is registered with Platform_driver.Compared with the traditional

driver isDevice_driverHowever, for ease of use, the platform device has another encapsulation structure.Platform_driver. The driver registration function used in a common driver isDriver_register ()The encapsulated product on the device platform isPlatform_driver_register (

http://blog.csdn.net/zqixiao_09/article/details/50888795 We have learned the theoretical knowledge of platform devices in front of Linux device driver development--platform device driver, the following will be an example to delve into our learning. first, the platform driven work process Platform model-driven program

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 (*

Path for Linux Device Driver engineers-basic principles and framework of network device drivers K-Style Reprinted please indicate from Hengyang Normal College 08 electric 2 K-Style http://blog.csdn.net/ayangke,QQ:843308498 mailbox: yangkeemail@qq.com 1. Linux network subsystem At the top of the Linux network subsystem is the system call interface layer. It provi

Document directory Is a block device driver a file system driver (FAL + FMD? Is a block device driver a file system driver (FAL + FMD? FAL, FMD, file system, device,

USB urb (USB request block) Kernel 2.6.29.4The USB device driver code communicates with all USB devices through urb. Urb uses the struct urb structure description (include/Linux/USB. h ). Urb sends or receives data asynchronously from a specific endpoint of the same USB device. A USB device

Brief introduction A block device driver accesses a device primarily by transmitting a fixed-size random data Linux kernel video block devices are basic device types that differ from character devices The Linux block device