Lesson 007 Bare Metal Development Steps and Tool Usage (Using SourceInght Notepad++)

Section 001_Brief Introduction to Bare Metal Development Steps

Recalling the time when I learned C language on VC6.0 in college, the general operation process was as follows:

x86 platform, Windows application: create a project, edit source code, compile code (compiler: VC6.0), and run.

To learn C language on Ubuntu, the general process is as follows:

x86 platform, Ubuntu application: edit source code, compile code (compiler: gcc), run.

The two are almost identical.

Glossary:

gcc:

GCC is the main compiler software under the Linux system. The full name of GCC is GNU Compiler Collection. In addition to compiling programs developed in C language, it can also develop programs in multiple languages ​​such as C++ and Java. GCC was originally intended to be a compiler specially written for the GNU operating system.

Reasons for using gcc: powerful, stable, open source and free.

1) gcc -v checks the version of gcc, thus verifying that the gcc compiler is normal.

No matter which version of gcc you use, as long as it can be compiled normally later.

2) gcc -o output file name source file 

o:output

Cross-compile mode:

Usually, the platform for compiling embedded programs is called the host machine (such as the Ubuntu system of the PC, the CPU architecture is the X86 architecture), and the platform for running embedded programs is called the target machine (such as a certain ARM development board, the CPU architecture is the ARM architecture). Editing and compiling ARM architecture programs on the X86 platform and the compiler arm-linux-gcc belong to different architecture platforms, so it belongs to the cross-compilation mode. Then burn the program to the ARM development board (download methods include: JTAG, USB, SD card, network, etc.), and then run the program on the development board.

editor: 

It is recommended to use source insight and notepad on the Windows platform. 

Source insight is very useful for viewing code, editing code, and other functions.

translater 

It is recommended to use arm-linux-gcc 

arm-linux-gcc is an arm compiler based on the linux platform. It is an open source and free compiler. 

arm-linux-gcc is powerful, stable, supports many arm chips, and is updated quickly.

Getting Started Mistakes: Using ads and MDK

ads (stop updating) and MDK are compilers for the Windows platform with weaker functions.

1) It is only suitable for individual or small team development, but not suitable for collaborative development of medium or large teams.

2) It is a paid software.

Section 002_Use of source insight code viewing tool

editor

It is recommended to use source insight and notepad on the Windows platform.

Source insight is very useful for viewing code, editing code, and other functions.

Source insight targets: c files, h files, ARM assembly files

Notepad is for: other files, such as Makefile (which simply means: specifying which source files to compile and specifying the output file name after compilation)

Source insight is a paid software, but this software can be used for free for 35 days. 

Version: 3.5

Installation package: Baidu "source insight3.5"

Common settings for source insight:

1. Add file types

 In options-->documents options, set the file filter of c source file to *.c;*.h;*.S

2. New Project (New Construction)

 project-->new project, and then add the corresponding files to the project.

3. Font settings (solve Chinese garbled characters)

 In options-->documents options, set screen fonts to: Songti, Regular, 12, GB2312.

Use alt+F12 to adjust the font width.

4. Explain the source insight window

Project window: Indicates which files are in the project. 

Main window: Displays the file contents of the currently opened file. 

Symbol window: displays the function name, structure name, macro definition, etc. of the currently open file. 

Context window: Place the cursor on a function (variable or macro definition), and you can see the corresponding definition in the context window below.

5. Display line numbers

 view-->line number

6. Quickly jump to a line

 There is a go to line in the toolbar.

7. Highlight keywords

Put the cursor on the keyword, then right-click menu -> highlight word

8. View the function definition location

Place the cursor on the function, then right-click menu -> jump to definition, or press ctrl + left mouse button. 

go back (alt + ,) to return to the last cursor position, or use the left arrow in the toolbar. 

go forward (alt + .) to the next cursor position, or use the right arrow in the toolbar.

9. Find

 Right-click menu-->lookup reference, or ctrl + /.

Section 003_notepad editor and binary file viewing tool

Here are two free tools: 

Text editor tool [https://notepad-plus-plus.org/ Notepad++] and binary viewing tool [https://www.hhdsoftware.com/free-hex-editor Free Hex Editor Neo].

Notepad++ usage tips:

Press Ctrl+mouse wheel to zoom in or out of the text content.

When viewing a C language file, double-click a variable to highlight the variable in the entire text;

When viewing a C language file, place the cursor at any bracket to highlight the entire bracket range;

The shortcut key "Ctrl+F" opens the search window and you can search for the required characters;

Free Hex Editor Neo usage tips:

Open the hex binary file, and by default, 16 numbers are displayed per line, i.e. 0x00-0x0f;

In the menu bar, go to View->Offset to set the display base of the left offset.

In the menu bar, select View->Display As to set the display system of the current data.

In the menu bar, select View->Columns As to set how much data is currently displayed in each row;

In the menu bar, select View->Group By to set the data type of the current data.