Hello everyone , I'm wheat .

Many college students 、 Beginners always like to ask a question ： How can I get there ？

The following is a personal experience shared by an embedded expert , Look at how steel is made , I believe it will help .

Stage 1

From freshman to junior year, I am the same as most students ：

Learn the professional knowledge （EE major ）,

Learn the computer courses required for embedded software development （ Assembly principle , The principle of computer organization , operating system ,C Language, etc. ）,

Learn Embedded projects （ From the laboratory project , The events I think of and all kinds of competitions ）.

About how to learn Embedded Software Development ：

① Study 51 Single chip microcomputer .

At this stage, you just need to follow Guo Tianxiang's video to learn , Only functions are required , natural .

But suggestions can raise questions , such as “ Why go to IO The control register can be lit by writing a specific value LED The lamp ？”

“IO What is the circuit structure of the port ？”

“ What is pull-up and pull-down , Fill current, pull current ？”,

This stage is mainly familiar with the use of MCU , And think and find problems in use , Also familiar with some basic concepts .

② Start looking up information and reading .

Look at analog circuits, digital circuits, etc , Start to figure it out 1 Questions raised in . At this time, the problem mainly focuses on the circuit .

③ Begin to learn STM32.

Buy any board , Read atomic books and do it step by step .

At this time, you will encounter many computer problems , This is the time to learn the tutorial , Learn the language ： Microcomputer principle , Compiler principle , operating system .

You have to find out ARM framework , Find out CPU How to pick a finger , decoding , perform , Know address bus , Control bus , How does the data bus work .

Find out what the files produced by each stage of your compilation are , What is distributed loading , What is relocation , What is a code snippet , What is a data segment , wait .

Find out CPU How to start , How the program image is laid out in memory .

Know how interrupts work , And site protection, etc . Finally, after you know all the knowledge points , to turn to GCC Development STM32, At this time, if you have good knowledge , You should be able to quickly learn to write linker scripts and understand the meaning of each statement .

④ Start enhancement C Language .

Dig deep C The dead corners of language .

It's best to know what the compiler will do when you write a statement .

You also need data structures and software engineering , It's best to learn design patterns .

Start learning to develop a good code style , Start thinking about the structure of your code .

It can be said that if you can learn design patterns well , Learn later LINUX The kernel is of great benefit .

You'll find that LINUX The input subsystem of is a bit like the responsibility chain mode , Will find ASOC The audio system is a bit like template method mode .

Private opinion , If you can examine the same programming idea in more than two different aspects , You will get a deeper understanding , Better understand its essence. .

⑤ Read it carefully OS A book on .

All knowledge points should be understood , What is the process , What is the procedure , What is a thread , Contention deadlock priority inversion , Virtual address space physical address space , User space, kernel space, etc .

Begin to learn ucos, There's nothing to say about this , If in 2 Be able to master all kinds of knowledge points , know CPU How to interrupt, how to protect and restore the site , So read ucos When the source code , In principle, there will be no doubt .

If you can 4 Develop the ability to grasp the overall structure of the code, and learn the data structure and basic algorithms , There is no obstacle to reading the source code .

Once the principle is understood , The source code can also be read , So thoroughly ucos It's a matter of course .

⑥ Imitate yourself ucos Write a stm32 Real time on os come out .

⑦ March LINUX.

Study LINUX Basic use of , Look at Zhao Jiong's book , chew LINUX Kernel design and implementation , Grasp the overall kernel architecture .

Then you can learn to drive , Read the book suggested by teacher Chen Xuesong , Understand the basic driver architecture and how to write simple drivers , take sth. seriously , Here's an emphasis on the device driven model .

Last bite LINUX Kernel source code scenario analysis , Read two volumes carefully , Here, I'd like to emphasize... In the kernel VFS part .

Then I read Mr. Song Baohua's book , Further learning driven development .

Last , Look at the kernel source code, look at the kernel source code, look at the kernel source code .

⑧ What else SPI,IIC, what DMA, It's just a matter of skills , As long as knowledge is good , You can do whatever you want .

Stage 2

From junior year to graduate school, I was very tangled between work and postgraduate entrance examination , During this period, I often think about what embedded development is , How to do embedded development well , What career path should I choose in the future .

So , Like a lot of people , I have consulted the predecessors of embedded development on the Internet for many times .

At this stage , I learned Linux Drive development , And gradually realize , Embedded development is a more software oriented position （ I think most students do embedded software development , Not hardware development ）,

You should study computer architecture deeply , Instead of doing boring embedded related projects over and over （ Especially less participation in messy competitions ）.

Final , I chose graduate school , Want to stand a little higher and see this thing .

Stage 3

Graduate student stage （2018）, When everyone is eager to join AI When your camp , I still love deeply .

Course selection , I chose the embedded real-time operating system , Courses related to computing architecture , I also read a lot of related books , Remain embedded weekly Linux Learning from .

When not with me , Mingming chose to be the mentor at the bottom , As a result, the tutor turned to deep learning , Fortunately, it's a terminal +AI Related directions , It's not a complete deviation , This is somewhat comforting （ After all, I still can't let go of the embedded ）.

At this stage , Because of contact with a lot of people and things , I realize more and more , Embedded is just a platform , Don't think of embedded as a specific position , No matter hardware or software .

therefore , I have a further understanding of this position and the current employment situation of the industry .

Stage 4

Study two to study three at this stage , I'm right in the narrow sense （ drive , application development ） Completely relieved ,

I don't think the embedded system that many people like is driver or application development , But a curiosity about the underlying system and the pleasure of control .

Rather than like embedded , I prefer computer architecture .

therefore , As long as it involves hardware software development , I like them all , I also define them as embedded .

Because embedded software development is based on the underlying language , The principle of computer organization , A kind of software development based on knowledge such as operating system ,

If you want to do embedded development well , You have to learn these courses well , If you learn these courses well , You should be qualified for all the positions in the underlying software development .

therefore , Why narrow the definition of embedded development to driver development ,XX Protocol development and so on ？

Final , I resolutely gave up at this stage Linux Driven learning , Put in Python In the arms of deep learning .

I don't care if what I do is embedded development , Only focus on whether it has anything to do with the embedded platform .

My research is how to deploy a deep learning model to the embedded platform .

Some may wonder , What does this have to do with embedded development ？ Why doesn't it matter ？ On embedded platform C Language to write forward reasoning of neural network model , This is not our C Has the knowledge of language and composition principles been brought into play ？

When the performance of the image processing program is insufficient , View the generated assembler , When assembly efficiency is not high , take C Language is replaced by assembly code written by ourselves , Isn't that enough ？

Actually , When we relax our thinking , Embedded is no longer a specific position ,

It could be AI Algorithm engineer ,AI Compiler development engineer ,FPGA Acceleration Engineer , High performance engineer, etc .

Original address ：https://www.zhihu.com/question/370606355/answer/1865920389

author ： The dreamer is also cold

Copyright notice ： Source network of this paper , The copyright belongs to the original author . Copyright issues , Please contact to delete .

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