bare metal vs virtualization

Obviously, we need to execute the ARM assembler first, and then the assembler jumps to the C program, but the compiler does not know whether to put the C code snippet or the arm assembler code snippet first, so we need to tell the compiler how to compile and connect. There is an LDS file in which the contents of the file determine the location of each code snippet in the program, and you can see how the file is passed to the compiler in the following makefile file.3. lds file/******************

, and 15 times is output. TC is the number of output records. Each output time, TC is reduced by 1, and the value is 0, one-service mode for stopping DMA and waiting for other DMA requests. If an interrupt is set, the MDA is interrupted. Therefore, TC is the cycle.Code Area Main. c # Define global_clk 1 # include "def. H "# include" option. H "# include" 2440addr. H "# include" 2440lib. H "// function declaration # include" 2440slib. H "# include" MMU. H "# include" profile. H "// extern void d

The following bare metal program is based on gt2440 and the compiler is a arm-linux-gcc-4.4.3. Program structure: This program only has one SPI. s file. Program process: first, the power-on Reset enters the reset exception. In the reset exception, call the subroutine to close the watchdog, initialize the system clock, initialize the serial port, and finally call SPI to send data, the data sent by SPI is spe

The first part is to play bare metal in pcduino3. This process allows us to better understand embedded systems and be familiar with the platform we use. First, we will introduce the development environment: Virtual Machine: VMware? Workstation 10.0.2 build-1744117 System: Linux slackware 3.2.29-smp #2 SMP Cross-compiler: arm-linux-gnueabihf-version: gcc version 4.8.2 20130805 (prerelool) (crosstool-NG linar

U-boot-2014.10 transplantation 4th days ---- bare metal buzzer program, uboot2014.10 Transplantation Hardware Platform: tq2440 Development Environment: Ubuntu-3.11 U-boot: 2014.10 This article allows reprint, please indicate the source: http://blog.csdn.net/fulinus I. BUZZER asm Assembler: /*********************************************************************** * File: beep.S * Version: 1.0.0

First, integrated development environmentSystem: CentOS 6.5Software section: Eclipse, GDB Server, Jlink softwareHardware section: Jlink HardwareGetting Started 1: Starting from Sd/nor Flash, formatting NAND flashPreparing for Work 2: Hardware connection 1. Jlink Connection 2. Serial Connection 3. NAND boot Ii. installation of GDB ServerDownload GDB ftp://sourceware.org/pub/gdb/releases/ Enter directory: #cd gdb-7.5

=============================================================================================================== ===================== First, preliminary preparation 1. The Development Board must be in the SD card boot mode. 2. Install USB download driver, install RS232 to USB drive. 3. Install DNS and turn on DNS. Second, burning write "tiny6410 bare Metal Program" fifth chapter: Assembly and C-mixed progra

This section describes how to burn bare-metal programs using Oflash and Openjtag. Oflash also supports parallel-burning writing, similar to Openjtag. If you want to use Jlink burn write, need to install Segger J-flash tools, here we do not introduce more.First, you need to install Oflash,oflash from the development board manufacturer or download from the Internet. Copy the Oflash to the "/usr/bin" directory

EmbeddedLinux Bare Metal Development (16)--Shell implementation First,Shell Introduction The shell is the interface between the user and the operating system and provides the user with an interface to use the operating system.1. Graphical interface Shell Graphical interface Shell (graphical User Interface shell is GUI shell)most widely used graphical interface Shell is Windows Explorer (Microsoft's Windows

EmbeddedLinux Bare Metal Development (eight)--s5pv210 Interrupt processing process an interrupt is a process that the CPU inserts into another program during the execution of the current program due to hardware or software reasons. The interruption process due to hardware causes is unpredictable, that is, random, and soft interrupts are pre-arranged. The signal source that caused the interruption is called

The paper is recorded in the Linux environment with the cross-tool chain to develop arm bare metal programs encountered some problems and solutions, mainly to solve the problem of the process and a number of small experience, small skills recorded. Now, some of the things that feel a bit of value are moved to the blog for readers ' reference. -----------------12.16----------------- 22:25Compiling a

Raspberry PI Series--bare metal illuminated LED lightsBackgroundRecently just bought Raspberry PI B +, configured to run the official Raspbian system, tossing a week Linux system, feel no meaning, so try to understand the bottom of the start process, through a few days of research, It is found that the boot of the lowest part is performed by the official Bootcore.bin and start.elf files (which should be the

EmbeddedLinux Bare Metal Development (13)--i²c communication a,IIC Protocol 1. Introduction ofIIC bus i2c (Inter - integrated circuit) bus is a philips The company developed a two-wire serial bus for connecting microcontrollers and peripherals. i2c Bus is a serial data bus, only two signal lines, one is two-way cable sda and the other one is the clock line scl i2c A data byte transmitted o

, DNW the title bar will display Usb:ok, window printing informationD: From the above, we can see why learn a button or USB burn Linux?A: Switching from a wince system to a Linux systemB: Replace uboot, kernel image zimage, one or more of the file system YAFFS2C: There is a bad zone, the Development Board will not startThe difference between E:USB and one-click Burning LinuxA: The same point: The same purpose is to burn Linux into NAND. Start with SD card All through the serial

localhost:2331 3 # Set JTAG speed to kHz 4 monitor endian little 5 Monitor Speed 6 # Reset the target 7 monitor reset 8 monitor Sleep 9 # Setup GDB for faster downloads #set Remot E memory-write-packet-size 1024x768 monitor speed auto break main loadAfter the above settings, you can start debuggingFive, start debuggingNote: When debugging with Eclipse, you must ensure that Jlinkgdbserver is running at the same timeOtherwise, an error similar to the following will appear:Make sure the jlinkgdbse

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Makefile slightly moved, that is, the original beginning of the "Led_on.bin" to "all", eclipse default compilation target is "All", it can be successfully compiled, after compiling will produce led_on.bin,led_on_elf. The former is downloaded to Nandflash, which is used for debugging.can be compiled after the start of configuration debugging, and debugging U-boot The only difference is the name of the specified application, as shown in. The other Debugger commands are the same as those configured

=============================================================================================================== ===================== First, the hardware pin description The tiny6410 Development Board has 4 user programmable LEDs located on the core board directly connected to the CPU's gpio. Led detailed resources occupy the following table: LED4 LED3 LED2 LED1 GPIO GPK7 GPK6 GPK5 GPK4 Second, bare-metal p

s3c2416 Bare Metal Development Series 13 Capacitive screen Drive implementation Chess Boy 1048272975 In the human-computer interaction system, the keyboard, touch screen and other input devices is an indispensable part. For mobile phones, tablets, these consumer electronics, touch screen with its very good user experience has been widely used. The author here is a simple introduction to the application of

In the article "Backing up the Active Directory with Windows Server Backup" I explained how to take advantage of Windows Server Backup to back up domain controls, and in this blog post, let's take a look at how you can restore the Windows Server Backup backup of the domain control information for bare metal restore operations; The steps can be referred to as follows: 1 Boot load Windows Server 2008 R2 SP1