address/***********add Here***********//*add the Nand Flash device*/. dev={. Platform_data=superlpplatform}/**************end add********/};4.1.2 Specifies initialization at startupKernel start-up based on our initial configuration changes to the partition's settings arch/arm/mach-s3c2410/mach-smdk2410.c file [[email protected] linux-2.6.14]$ VIArch/arm/mach-s3c2410/mach-smd1q410.cModify smdk2410_devices[]. Indicates that initialization includes the Flash partition information we set up earlier
/*/kernel directory.LIB: library file code.MM: Memory management code, and part of the platform-related code is placed in the ARCH/*/MM directory.NET: Network-related code, the realization of a variety of common network protocols.Scripts: The script file used to configure the kernel.5, Android Transplant is mainly the Linux kernel transplant, the Linux kernel transplant is mainly Linux4-Driven porting. So we need to build two sets of environments for
GPB1;Control LEDs need to be completed by 3 registers;Each register can use 4 bytes;Use the low 16 bits of the Gpmcon register to set the two port properties of the LEDs to output;Low 4-bit control LED is illuminated using the GPMDAT register;Use the low 8 bits of the GPMPUD register to turn on the LED light's pull-up circuit respectively.Control LEDControlling LEDs by string: Using the command line or through the Write functionControl led via I/O command: via the IOCTL functionModule parameter
By learning Android Deep Exploration (Volume one) HAL and Driver Development chapter Tenth let me know the debugging technology and debugging tools for embedded Linux.PRINTK can print kernel debugging information, the function is similar to the printf function, except that the PRINTK function runs in kernel space, and the printf function runs in user space. The PRINTK file is a simple four-digit text file w
CVE-2016-2502-DRIVERS/USB/GADGET/F_SERIAL.C in the Qualcomm USB driver in Android.Buffer Overflow Vulnerability reported by #plzdonthackme, SOCTT.struct Ioctl_smd_write_arg_type { char *buf; unsigned int size;}; #define Gserial_buf_len 256char smd_write_buf[gserial_buf_len];struct ioctl_smd_write_arg_type smd_write_arg; ... case gserial_smd_write: if (Copy_from_user (smd_write_arg, ARGP, sizeof (SMD_WRITE_A
Git is a complex feature that makes your development faster and more manageable, especially with friendly interactions and feedback on open source projects.Familiarity with some of the GIT instructions can help developers avoid being interrupted by external factors or even delaying the project's check date. The submission of the specified code base requires RSA authentication, and the public key is required to determine that the device can submit the management code base.If the source code is th
corresponding message at the console. The PRINTK function displays the message in the console (also known as a terminal) through the/dev/console device file, which functions only under the console of the character interface, so the PRINTK function is only used on the console of the character interface to output messages normally.In Linux file systems,/proc is often used as a tool for data intersection =ee of kernel space and user space. The/proc file system behaves like a device file system C/d
In the hardware/RIL directory, the ril driver module of Android is divided into three parts: rild, libril. so, and librefrence_ril.so, and radiooptions are available for automatic or manual debugging. All depend on the ril. h header file in the include directory. Currently, the cupcake branch is equipped with gsm support and the cdma branch. The gsm driver is ana
Key driver source code in the kernel/ARCH/ARM/mach-s5pv210/button-smdkv210.c, the source code is very simple,Set the registers of the related buttons in the initial_button_probe function, and then enable timed timer scanning. When the timer is interruptedThe s3cbutton_timer_handler function judges the corresponding IO port level to monitor the key.It is worth noting that when we need to modify the button function, we need to match the buttons on the
Embedded Linux debugging technology, for the complex Linux driver and Hal and other libraries, need to use a variety of methods for debugging, such as setting breakpoints, gradually tracking code, output debugging information. This chapter focuses on how to debug embedded Linux kernel modules, executables, and shared libraries using the Development Board, Android emulator, and some functions and tools.The u
Android Deep Exploration (Vol. 1) HAL and Driver development experienceThe tenth chapter of embedded Linux call technologyFor complex Linux drivers and libraries such as HAL, you need to debug them in a variety of ways. For example, set breakpoints, step through code, output debugging information, and so on. While embedded Linux is not easy to debug with visual Studio, Delphi, Eclipse visualization tools, l
firstThe main device that provides BCLK and Lrck clocks.1, in the left alignment mode, the MSB can be in the bclk of the first rising edge of the following LRCLK transition.2. In right-justified mode, the LSB can transition before the last rising edge of the BCLK LRCLK.3. In i2s mode, the MSB can transition from the second rising edge of the BCLK following the lrclk of a transition.4, some sound cards also support the DSP format, the format is not part of the I2S category.LRP = 0LRP = 1Iv. Cloc
firePending, retrieve the pending_list event and execute the event-> func.After these operations are completed, calculate the new timeout time and re-select to block Multiple I/O.
The previous initialization process has been analyzed. After Initialization is complete, three event objects are attached to the queue:S_listen_event: socket named rild, main requeset response channelS_debug_event: socket named rild-debug. requeset response channel is used for debugging (the process is basically the
debug user space. Quit is used to exit the GDB debugging interface; list is used to list the code in the program. Remote debugging of the user space program with Gdbserver is a service-side program that can run on an arm architecture. First enter the Android emulator terminal and then enter the Data/local directory. The Android emulator can only use the Gdbserver debugger through port mapping.Using KGDB to
Because the Ubuntu linux12.04 virtual environment on the disc requires the CPU to support virtualization, some PCs may not be able to successfully open the virtualization environment, and AMD's CPU may not. But it doesn't matter. The disc containsSource code(Sources directory ). You only needCodeIn the/root/DRIVERS directory of Ubuntu Linux, open the common. Sh file in the source code root directory, and find the following line.
Ubuntu_kernel_path =/usr/src/linux-headers-3.2.0-29-generic
C
Git-byLinuxthe FatherLinuswriting, is a source code control software. Linusfrom the perspective of a file system expert and a kernel designerGitdesign, its unique design allowsGitwith exceptional performance and optimized storage capabilities,Gitin all respects is superior to other similar source control software. In learningAndroidandLinuxkernel, the process of driving development involves a lot of source code, and the code isGitmanagement, and therefore, in learningAndroidTransplant andLinuxUn
MTK Android Driver: GPIO, mtkgpio
1. parameter descriptions for each column:1.1.Def.Mode: indicates the initialization mode of the gpio module after startup. Each GPIO pin can have a maximum of seven modes, and MODE0 is always the GPIO mode.
The mode of GPIO after system initialization is determined by the Def. Mode column.
1.2.M0 -- M7: Optional mode for each gpio of the M0-M1-M3-M4-M5-M6-M7.
If some it
Introduction to wm8960 for debugging the sound card driver in android 2. androidwm8960
3. Introduction to LINPUT input channels
The main configuration of LINPUT is as follows:
Set bit8 (LMN1) of R32 to 1: LINPUT1 connects to PGA;
Set bit7 (LINMUTE) of R00 to 0: Disable mute;
Set bit5 (AINL) of R25 to 1: PGA enabling;
Bit5 (LMIC) of R47 is set to 1: Left Boost Mixer;
Bit3 (LMIC2B) of R32 sets 1: boost conne
1 , Download the source codeTo download the source code, you first need to install the following tool software: Curl and Git-core1.1 Installing Curl:Open terminal, you can open terminal by using the shortcut of Ctrl+alt +tExecute command in terminal: sudo apt-get install curl1.2 Installing Git-core1.2.1 Creating a new Bin directory under the user directoryExecute in Terminal: mkdir ~/bin1.2.2 Installation Git-coreExecute in Terminal: Curl Https://dl-ssl.google.com/dl/googlesource/git-repo/repo >
-m ' helloworld-master '//Submit files to the repository# git Log//display log information# git checkout helloworld.txt//immediately revert to the state of the most recent commit. Create a local branch# git branch//See which branches are in the current repository# git branch new-branch//Create a new branch# git branch-d new-branch//Delete a newly created branchSwitch to local branch# git checkout new-branch//Switch the current local branch to New-branch# git Add helloworld.txt#git commit-m hello
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