Linux Device Driver inquiry 1st days ---- spi Driver (1), 1st days ---- spi
This document allows reprinting. Please indicate the source:Http://blog.csdn.net/fulinus
The Linux kernel code is too big, and a small module will make you feel helpless. This afternoon, I am determined to take a good look at the spi driver.
First, analyze the spidev. c file, which define
Linux loopback NIC Driver Design, linux loopback NIC Driver
Loop NIC Driver1. The difference between a back-to-loop network card and a common network card is that it is virtual rather than a physical network card. It is equivalent to concatenating the sending end and the receiving end of the common network card.2. in the kernel source code, the loopback Nic Program (drivers/net/loopback. c) It is not provid
The cause of this error is that the computer used is 64-bit, but the MySQL 64-bit ODBC driver and the qt odbc driver do not know where it is incompatible, so the connection may fail. Reinstall MySQL's 32-bit ODBC driver for configuration, and connect again (64-bit and 32-bit drivers can work normally, this is not scientific = ).
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Another problem! When the camera application is started, it needs to write the Register through the IIC bus, and there are still a lot of them. In this process, the power management IC driver also needs to read the battery voltage, current, and charge/discharge status through the iic bus. In this way, TX time out occurs. Turning off the PMU driver to read IIC, the camera module writes register each time!
A
Download Chrome Driver First (the installation of Firefox Driver is the same as this step)Link:Http://chromedriver.storage.googleapis.com/index.htmlNext, on the console (terminal), manipulate the instructions for the red font:
Install Unzip
sudo apt-get install unzip
Assuming you ' re running a 64-bit OS, download the latest version of Chromedriver from their website
wget -N http
Bowen from Http://blog.csdn.net/droidphone Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx1. Origin of Asoc
Asoc--alsa system on Chip is built on a standard ALSA drive layer to better support a software system for embedded processors and audio codec in mobile devices. Before ASOC, the kernel had some support for audio in the SOC, but there were some limitations: the codec drive was too tig
MongoDB samus Driver (1), mongodbsamus driver
Https://github.com/samus/mongodb-csharp
The official driver is not easy, so I used this,
1 var connectionString = new mongoonstringbuilder () 2 {3 ConnectionTimeout = TimeSpan. fromSeconds (30), 4 ConnectionLifetime = TimeSpan. fromSeconds (10), 5 MinimumPoolSize = 1, 6 MaximumPoolSize = 10, 7 Pooled = true, // use
Solve "system. Data. ODBC. odbcexception: Error [im001] [Microsoft] [ODBCDriverProgramManager]The driver does not support this function"Cowbird
Recently I met a web application that uses ODBCConnectionFoxProDatabase, the Web applications developed by the results are not available on every computer. Some computers Report"System. Data. ODBC. odbcexception: Error [im001] [Microsoft] [ODBCDriver Manager]The driver
Nand flash Driver kernel implementation analysis process:
Analysis code
Handler // drivers/mtd/nand/nand_base.c identify nand flash based on nand_chip's underlying operation function and construct mtd_info nand_scan_ident nand_set_defaults if (! Chip-> select_chip) chip-> select_chip = nand_select_chip; // The default value is not applicable if (chip-> program func = NULL) chip-> program func = nand_command; chip-> program _ctrl (mtd, command, ctrl);
Author: wogoyixikexie @ gliet
Previously, I heard from my friends about porting drivers under PB to BSP, and even the file system to BSP. -- Haha, It's very advanced. Now I will take the SD card of 2410 as an example.
Previously I did not know that the SD card driver would be in the Pb installation file. Let's take a look at the following three posts-2410 large-capacity SD card research.
Http://topic.csdn.net/u/20080911/16/111a849c-fd1f-4955-840d-6ddf
OCI: to install the Oracle client, the portability is slightly poor, and theoretically the performance is better
Thin: belongs to type4, which is implemented in pure Java and has good portability. Theoretically, the performance is slightly lower.
Recommendation: it is best to use thin driver, which is more portable and more standard, with fewer problems. As for the performance, to be honest, thin driver
Android, X Windows, QT, and many other applications support input devices, such as the keyboard, mouse, and touch screen, in Linux systems, or increasingly prefer the standard input subsystem.
Because the input subsystem has completed the character-driven file operation interface, the core task of writing the driver is to complete the interface set aside by the input system, with little workload. But if you want to apply it more flexibly, You need to
Character Device Driver:
1. Generally, we use APIs that dynamically allocate device numbers:
Int alloc_chrdev_region (dev_t * Dev, unsigned int firstminor, unsigned int count, char * Name );
Dev is a function used for output. After successful call, the first number of the allocated range will be saved.
Void unregister_chrdev_region (dev_t first, unsigned int count );
The above function allocates device numbers for
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 isLinuxkernel. And then, respectively,C + +code Base,Android SDK Aand applications. andAndroidtransplantation is also divided into syste
Laptop installed sound card driver error no appropriate Driver to be installed
Cause Analysis:
There are Realtek and conexant two kinds of sound cards, when the system can not automatically identify the device when there will be an error.
Solution:
Enter the corresponding folder double-click Setup to install the driver
If Realtek's sound card enters the
We open "Drive Wizard" software in the computer, the effect is as follows
In the Open interface we just click on the second "driver" below
Then you will automatically get all the drivers you want to upgrade. We click on "Upgrade" to start downloading the driver files.
The driver will be installed automatically when the download is complete.
Driving life may be driven by the installation of an Apple phone, we just drive the life on the computer, and then turn on our click "Update Now" button to update, this drive life can help us install the latest driver.
Click to open the peripheral driver interface, you can see that the computer all external access to the USB input device, will appear in this interface. Click on a device, you can view t
1, create a device node in the/sys/class/directory, such as creating a CLASS_TEST_USB device node[CPP]View Plaincopy
Static struct CALSS *test_class;
Test_class = Class_creat (This_module,"Class_test_usb");
2, create another device node in the CLASS_TEST_USB directory android0, as follows[CPP]View Plaincopy
struct device *dev;
dev = device_creat (Test_calss,null,mkdev (0,0), NULL,"android0");
if (Is_err (dev))
return Ptr_err (dev);
3, create severa
The driver Microsoft Print to PDF required for the printer is unknown. Before logging on, please contact the Administrator to install the driver ., Microsoftprintpdf
After this problem occurred, I felt very confused because the printer was not installed on the server. Where did the printer come from?
Through Baidu search, I found a post on the Internet to answer my questions. Original post address: http:/
This is a creation in
Article, where the information may have evolved or changed.
Problem:2015/12/04 17:03:36 sqldb.go:2166:sqldriverconnect: {IM005} [MICROSOFT][ODBC Driver Manager] driver Sqlallochandle on SQL_ HANDLE_DBC failure
Environment: Go language writingSQL SERVER DatabasePackages used by the "CODE.GOOGLE.COM/P/ODBC" database operation
The program just started, running all right, but after a perio
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