The sixth chapter mainly introduces the Java programming Interface program under the Android environment. Includes LED interface, serial port, ZigBee and driver, Wi-Fi interface, player and so on.(1) LED driver circuit: GPIO interface, Port group GPJ3 contains six control registers: control register, pull-up register, data register. The function of the LED charac
We have prepared our own driver before, and now we want to test our tool in android.Here, I use extern to compile and generate a tool, which can be executed in the adb shell to capture our temperature value.This step is relatively simple and can be seen as a linux application with code:/External/temperature. c# Include # Include # Include /*Struct input_event{Struct timeval time;_ 2010type;_ 2010code;_ S32 value;};*/Int main (void){Struct input_event
: Includes LED, stepper motor, DC motor, ADC, UART and USB.3. Database design: Including table name, column name, type, size, determine whether the primary key and other functions. Accessibility design for Android embedded configuration software: When compiling on the menu bar, it is used to display the results of the compilation. Includes features such as root layout, screen resolution, editing, and deletion. The
install using VMware under Ubuntu Linux to run Windows XP.Step three: Prepare to burn and write before AndroidFirst copy the Android_fs.tar, Mmc.bin, and zimage files to the SD cardFourth step: Start burning from SD card to write AndroidInsert the SD card into the slot of the OK6410 Development Board and set the SD card to boot to open the Development Board.Start copying data from SD card after entering the. YJSX commandFifth step: Calibrate the screenAfter installing
Write a C program to quickly test the hardware driver:Create the Driver_test folder in the external folder under the Android source root directory:CD Externalmkdir driver_testCD Driver_testCreate Android.mk:Local_path: = $ (call My-dir) include $ (clear_vars) Local_module_tags: = Optionallocal_module: = driver_testlocal_src_ FILES: = Driver_test.cinclude $ (build_executable)Create driver_test.c:#include Back to An
Android Deep Explore (Vol. 1) HAL with driver developmentChapter III Getting Started with GITExperienceThis chapter focuses on the learning of Git and introduces the source code that Git uses to get a lot of open source projects.Before using Git, we first install it with the Install command:#apt-get Install git#apt-get Install Git-doc git-svn Git-gui GITKUnder Linux, you can use the Man command to view the
Android Deep Explore HAL with driver developmentChapter IIIGetting started with GitReading notesGit is the software that manages the source code. First, install Git# apt-get Install git# apt-get Install Git-doc git-emall Git-gui GITKUse the following command to control Git:# Apt-get Install Git-core# apt-get Install Git-doc git-svn git-email Git-gui gitkSecond, view Git documentationTo view the git-checkout
during the development phase, which is removed when the Linux driver is officially released. The output of the PRINTK function can be controlled by compiling instructions in the C language.3. Data interaction through a virtual file system (/PROC)In Linux file systems,/proc is often used as a tool for data interaction between kernel space and user space. /proc is a virtual file system, which is a memory map. All operations on/proc are read and write t
At present, a small car, one into the community, parking full of cars, a car has become commonplace. And check the driving license violation record, pay illegal fines, with the development of mobile interconnection, so that these previously need to run the bank, run traffic Police Brigade matters, now through the mobile phone side can be solved. But the mobile phone also has a disturbing place, that is, the manual entry of the driver's license information is very cumbersome, and the operation is
This article was reproduced from: http://blog.csdn.net/MyArrow/article/details/8136018(1) Add header file:#include (2) Adding a early_suspend structure to a specific drive structure:#ifdef Config_has_earlysuspendstruct Early_suspend early_suspend;#endif(3) Registering the relevant early_suspend structure in the driver probe function:#ifdef Config_has_earlysuspendFtk_ts->early_suspend.level = Early_suspend_level_blank_screen + 1;Ftk_ts->early_suspend.s
This chapter provides a detailed introduction to the Minicom Serial debugging tool, which includes 4 steps, and requires Eboot erase Nandflash before burning the Android system into 5 steps. Now there are a variety of development boards on the market, we should grasp the method based on a detailed understanding of the differences between the different development boards.This chapter also learns about the Development Board test environment, because we
user-space program kgdb.
Debugging a user-space program with GDB
Remote debugging of user space programs with Gdbserver
debugging kernel programs remotely with KGDB
Linux kernel debugging has been considered by many people to be very difficult. Most people prefer to use the PRINTK function directly to output debugging information and not to use various commands. (GDB, Gdbserver, KGDB, etc.) for debugging. Because doing so does not necessarily make for more benefits.Althoug
of the virtual file in the read-write/pron directory, proc_dir_ Entry struct represents a virtual directory or file(iv) Commissioning toolsLinux systems provide a class of tools that line up the code of the program, which includes GDB, Gdbserver, and debug kernel space programs for debugging user-space Programs kgdbGDB Debug User space programGDB can track programs that debug user space and can only be tested on a PC2.gdbserver Remote Debugging User space programUse Gdbserver to test programs t
Hardware Abstraction Layer: HALHal is a set of libraries built on Linux drivers. This library is not part of the Linux kernel, but is an application that belongs to the Linux kernel layer.Google joins Hal for Android to: Unify the hardware's calling interface. Solve the GPL copyright issue. For some special requirements.This chapter also describes in detail the addition of HAL for LED drivers:1. Write a procedure that supports the HAL Linux
* env);Modify the Android.mk file in the current directory:Join in Local_src_files:Com_android_server_gpioservice.cpp \To compile the Jni method:Mmm Frameworks/base/services/jniIf the hint is missing libandroid_runtime.so, libsystem_server.so, libandroid_servers.so, execute:Make Libandroid_runtimeMake Libsystem_serverMake Libandroid_serversOnce the Jni method has been compiled, the JNI method can be invoked via the Android hardware service Gpioservice
1. Open the management-Device Manager of the computer and connect the Android device with USB (for Android devices to Enable USB debugging). You can see the USB device with a yellow question mark.2. Right-click the device to view properties-details, and select hardware ID in properties. You can see the hardware ID, for example:
USB \ vid_2207 pid_0010 rev_0222 mi_01usb \ vid_2207 pid_0010 mi_01
3. Op
portStep Two: Install minicomStep Three: Configure minicomFourth step: Detect minicomBefore burning the Android system, you need to use eboot to erase the Nandflash, as follows:The first step: getting Ready for workStep Two: Enter the eboot StateStep three: Erase NandflashThe steps to burn Android are as follows:The first step: getting Ready for workStep Two: write mmc.bin and ZImage.sb.bin to SD cardStep
own advantages and disadvantages, we can according to the actual use of the communication interface to select and use. Also learn to u-boot image download and write, in the process to pay attention to the terminal commands, the kernel image file under/image, the directory has "zlmage-lcd43c" and "zlmage-vga-1024*768" two kernel image files, It is to drive the liquid crystal display device and monitor core respectively. In this chapter, we mainly take the fs-s5pc100 Development Board as an examp
* env);Change the Android.mk file under the Services/jni folder:Increase in Local_src_files:Com_android_server_gpioservice.cpp \To compile the Jni method:Make Target_product=am335xevm_sk-j8 omapes=4.xIf successful, the libandroid_servers.so is generatedOut/target/product/am335xevm_sk/obj/lib/libandroid_servers.so Once the Jni method has been compiled, the JNI method can be invoked via the Android hardware service Gpioservice to invoke the hardware ab
video=mxcfb2:off fbmem=10Msaveenv
Among them, Video = mxcfb0: Dev = LDB, The LDB-XGA indicates that the fb0 LDB driver is used.
If = rgb666, bpp = 16 indicates 16-bit color
After setting, use printenv to view the startup parameters:
X6Q SABRELITE U-Boot > printenvbootdelay=3baudrate=115200ipaddr=192.168.1.103serverip=192.168.1.101netmask=255.255.255.0loadaddr=0x10800000rd_loadaddr=0x11000000netdev=eth0ethprime=FEC0bootcmd=booti mmc1ethact=FEC0b
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