What knowledge should embedded arm have for electronic information engineering self-study and how to prepare? I heard that I want to learn operating system, data structure algorithm and linux.

I know the best way to start using ARM.

1, seize 5 1 and develop ARM.

My own personal opinion: 5 1 is a foundation, but it is also very important, which I felt after watching ARM. It can speed up your arm learning, really! I don't believe you. Give it a try.

Anyone who wants speed and efficiency, don't do useless things, seize every minute around him. People are alive and things (knowledge, books) are dead.

2. how to get started with 2.ARM?

First of all, talk about the development of ARM.

It's a great job. Open the websites of various companies, and the embedded positions in the recruitment account for more than half of the engineer positions. There are only a few generalized embedded systems: the traditional 5 1, AVR and PIC are called embedded microcontrollers; ARM is an embedded microprocessor; DSPFPGA. Objectively speaking, DSP needs more than ARM, and ARM is similar to FPGA. Due to the unprecedented development in the field of digital processing and communication, DSP has a wide range of applications, from MP3 cameras to controllers in our military products.

It is worth noting that: in job hunting, enterprises (well-known, not small) pay no more attention to simple ARM hardware development engineers than single chip microcomputer, and few large enterprises write "ARM development is preferred" in their positions. What do you write more about? I believe you can see "embedded LINUX" here. What is needed is software in hardware.

Second, is ARM hardware or software?

It's hard to say that ARM is hardware and LINUX is software. Most of ARM's hardware has been modularized. If I change the board like this, it will be more touching. This is also ARM's strategy. I admire it again. In fact, the development of LINUX is more and more time-consuming. In this respect, ARM should be regarded as software.

This is especially true when looking for a job. For example, in Lenovo, the closest thing to ARM is "BIOS engineer" and software, while in MOTO, the closest thing to embedded LINUX engineer is software. Many other companies classify embedded product development as hardware. Therefore, this will not be discussed, and playing with your own board is the key. You call yourself an "embedded development engineer" when you are really upset.

Fourth, do you want to have a single chip microcomputer foundation such as 5 1 AVR?

It's better to have it, but it doesn't matter if you don't have it.

5. What software do you need to learn to develop?

To sum up, there are mainly the following:

1, ADS debugging

Advertising +AXD, to be exact. The advertisement contains AXD. Originally, they all used SDT. Later, ARM no longer supported SDT, and instead supported ADS. Let's use advertisements.

Some people's programs are still released in SDT version, but basically they can find corresponding advertisements. Newcomers shouldn't be confused here. ADS is a compiler and AXD is a debugger. Debugging in ARM's RAM, it is as cheap as AXF's

2、PLASHPGM

FLASH burning software. AXD is debugged in RAM, and it will be gone when power is cut off, which is convenient for program modification. The debugged program is downloaded to FLASH, and it is powered on to run directly.

There are many similar softwares, such as FLUTED and FLSHP, but FLASHPGM is the best. If someone still asks the question that FLASH does not support BIN format files, it's up to my PLASHPGM.

3.BANYANT debugging agent (I don't know if the name is right. I usually call it "half a sheep" because I know it only ate roast sheep.

Debugging agent is to use it to help you realize most of the functions of JTAG emulator with simpler JTAG (cheap) at the original price of1k. See my other explanation for JTAG debugging principle. Simply understand the JTAG driver for yourself. There are many debugging agents, such as H-JTAG and ARM7 (I don't know the specific name, but I remember that the executable file is called ARM7. EXE), and BANYANT is better. It should be noted that none of the installation methods of debugging agents are simple, but they are all different and need to be explained. And AXD should be run before debugging. Save money, so don't bother.

4, ARM-ELF-TOOLS tool chain

UCLINUX has developed tools, such as ARM-ELF-GCC. A tool chain is something that packages many tools together and publishes them for your development. See my other note for the specific installation method. In addition, if you want to develop LINUX, you should use ARM-LINUX-TOOLS, which is different and not universal.

5. U-shaped boots

The well-known BOOTLOADER generation tool seems to have Li Meihui (ambiguous name ~ ~). The generated BOOTLOADER is burned into FLASH, and then you can download and burn others with BOOTLOADER. BOOTLOADER is required to download UCLINUX. BOOTLOADER is like a BIOS on a computer. Of course, UCOS doesn't need this and doesn't know what to use:) The latest version is 1. 1.4. See my other note for specific usage.

6.UCLINUX software package

UCLINUX source package, needless to say? I suggest you use your existing experience first, and then compile and cut it yourself. Because the editing technology of UCLINUX alone is relatively simple, but it involves a wide range.

7、VMWARE

Old-fashioned virtual machine software, in a virtual machine, one machine installs Linux (used on PC), which saves you the trouble of switching machines back and forth. Remember to install VMWARE-TOOLS. The installation method is in my other note.

6. What books do you recommend?

I mainly recommend ZLG's three books. With these three books and the internet, I don't need any other books. Among them, I mainly recommend the first two books, and the third one introduces the architecture, which is not bad:

1, ARM embedded LINUX system construction and driver development, Beihang edition, driver is written in detail, and the introduction of early development is also very good.

2, ARM embedded system experimental course (II), Beihang edition, with ZLG2200 schematic diagram, experimental procedures and notes, to understand how people developed it.

3. The basic course of ARM embedded system, the most important thing is the architecture, the assembly part is introduced, and the theoretical literacy is increased.

4.44B0 data sheet is written here to emphasize its importance.

ZLG's early red ARM architecture is not recommended ~ only classes, too much writing, tired of reading. I haven't read several other books. Never seen it. okay You've read some recommendations.

Seven, choose UCOS? UCLINUX？ LINUX？ VXWORKS？ Or use it as a microcontroller.

1, engaged in development, engineering design, using UCOS, compact, multi-process, simple, reflecting the essence of ARM7.

2.LINUX embedded system is widely used in the field of LINUX consumption and communication, but the disadvantage is that it must be ARM9 to run, and the board of ARM9 can't do it by itself. Six-ply boards are too expensive. Buy a development board 1K to hit the bottom. However, it is still recommended to choose ARM9+LINUX.

3, UCLINUX is a speculative embedded system:) It can run on ARM7, because you have a close relative of LINUX, and you can easily switch to LINUX, and use it like a poor man like me, hehe.

4, VXWORKS, you can find a high-paying job if you learn it well, but the job opportunity itself is not better than LINUX.

It is not recommended to use it as a single chip microcomputer, although ZLG, whom I admire, has been calling for it. Because for learning, multi-process system design is the head of ARM7, at least you need the whole UCOS:)

A friend asked me if I could learn this as a foundation first. Of course ~ ~ but it took me 1 week to get it done. Here are my notes for debugging the advertisement in RAM first. Later, the small program I used to clear the flash was the LED flashing program I wrote at that time. In addition, at 1 week, I loved eating so much that I didn't set the OM well, which led to the failure of the array. This must be done, but it has passed. Aim farther away.

8. How long does it take to study?

I have been a rookie for more than two months now, and I have been disturbed several times. Or have you done PCB design and plate making, RAM debugging, FLASH download, UBOOT transplant and download UCLINUX (unedited, ready-made), LCD driver. To tell the truth: I really compare dishes. I say this not to envy everyone, but to tell you that "you should be better than this". I believe that a good attitude+appropriate methods+timely summary = results!

9. what does 9.ARM play?

Just what time:

1, hardware design

2. System transplantation

3. Promote development

4. Application development

It's gone. Among them, it is recommended to focus on the next two, 3 difficult, 4 flexible, and the most important thing is to find a job.

XI。 Color development method

The following is my development process:

1, design diagram (JTAG truth instrument with wiggler)

2. Design PCB (JTAG truth instrument with wiggler)

3, plate making

4, welding voltage, determine the voltage is no problem.

5. Weld 44B0+JTAG circuit +WIGGLER's JTAG truth instrument+peripheral circuit, and connect BANYANT+ emulator. BANYANT prompts an error, but it can display the number of 44B0, which seems to be 0x0F0F0F0F0, indicating that 44B0 can.

6. Welding crystal oscillator +RAM+ROM+ peripheral circuit and connecting BANYANT+ emulator can display the correct 44B0.

7. Connect with BANYANT+ emulator, open AXD, and operate RAM in the command line window to see if it can be modified. If you can (see the RAM address in the memory window), RAM will be fine. You can use this command "setmem 0XC000000, 0xffffffff, 32". My RAM is hung on BANK6, so the address is 0xc000000. If you change it, you have to change it.

8. Debug the program with the method I wrote "I wrote a C project template and an instruction". Write a simple one. I wrote an LED flashing. See if it works.

9. Burn the program into FLASH according to the summary of FLASH burning and test it.

10, transplant UBOOT according to UBOOT transplant operation.

1 1. Download UCLINUX according to the simple instructions for downloading UCLINUX.

12. Look at the method of driver development and write a driver yourself.

13, there are many things for you to play with.

Twelve. About JTAG truth instrument

JTAG truth finder is mostly a simple board, a model 244, and there is nothing wrong with it. According to several definitions of parallel port, it is recommended to choose WIFFLER definition because there are many supported software. There are many on this website, so don't say much. It is worth mentioning that some JTAG truth meters have jumpers on the schematic diagram to enable the reset signal, which generally does not jump. Just don't use the reset signal, because JTAG protocol itself can also control the reset of 44B0. Of course, there is no need for a reset signal jumper on the springboard.