4. "Wanli" Raspberry Pi car - C++ learning (compile and run, use geany)

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4. "Wanli" Raspberry Pi car - C++ learning (compile and run, use geany) [Copy link]

 

In the past, when learning C language or embedded programming, there was an IDE. In the Windows environment, you hardly had to worry about compilation and linking. However, in the Linux environment, you need to understand the compilation and linking process.

Create a new "hello_world.c" file in the folder, open it directly with Notepad, then write the following simple code and save it.

#include <stdio.h>
int main(void)
{
printf("Hello world\n");
return 0;
}

In the Raspberry Pi system, press "F4" in the folder to call out the terminal, and the path is the current folder. Enter:

gcc hello_word.c

An executable file a.out will be generated in the current directory, and then enter:

./a.out

Run the file and "Hello world" will be displayed in the terminal.

The whole process above is the compilation and running process of C code. It is indeed not easy to use commands.

You can use the Geany software in the Raspberry Pi to compile and run C language.

Right-click the "hello_world.c" file, choose to open it with Geany, and then click "Compile", "Generate", and "Run" in sequence. As shown in the 123 mark in the figure below, "hello world" can also be displayed in the opened terminal.

When writing C code using Geany, there are keyword color prompts, and it is also very convenient to compile and run.

The wiringPi library is used in " Raspberry Pi 4 Pin Functions and Operation Methods ", and the following instructions are used during compilation.

gcc -Wall -o blink blink.c -l wiringPi

This instruction refers to using gcc to compile. The most basic usage of gcc is: gcc [options] [filenames]

-Wall generates as many warning messages as possible.

-o means output executable file, the default output is a.out

-I means adding directories to the gcc header file search path

In Geany, you also need to add wiringPi to the search directory and set it as follows in the build command.

This makes it very convenient to use Geany to write, debug and run code.

question

Will the real-time features of C language be better than Python?

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Summary of "Wanli" Raspberry Pi car:

lb8820265's "Wanli" Raspberry Pi car open source sharing - DIY/Open Source Hardware Zone - Electronic Engineering World - Forum (eeworld.com.cn)

Table of contents:

"Wanli" Raspberry Pi car launched

1. “Wanli” Raspberry Pi car - Establishing a project warehouse

2. "Wanli" Raspberry Pi car - Python learning (using Thonny)

3. "Wanli" Raspberry Pi car - Python learning (timing task)

4. "Wanli" Raspberry Pi car - C++ learning (compile and run, use geany)

5. "Ten Thousand Miles" Raspberry Pi Car - WiringPi Learning (Delay and Thread Simulation Timer)

6. "Wanli" Raspberry Pi car - wiringPi learning (PWM and external interrupt simulation timer)

7. "Ten Thousand Miles" Raspberry Pi Car——RPi.GPIO Learning (PWM and External Interrupt Simulation Timer)

8. "Wanli" Raspberry Pi car - socket learning (local communication)

9. "Ten Thousand Miles" Raspberry Pi Car - Socket Learning (TCP Two-Machine Communication)

10. "Ten Thousand Miles" Raspberry Pi Car - Socket Learning (UDP Two-Machine Communication)

11. "Wanli" Raspberry Pi car - socket learning (sent from Android)

12 "Wanli" Raspberry Pi car - socket learning (Android sending and receiving)

13. "Wanli" Raspberry Pi Car - Accessories Preparation

14 "Wanli" Raspberry Pi car - motor drive learning

15 "Wanli" Raspberry Pi car - photoelectric encoder learning (forward and reverse judgment)

16. "Wanli" Raspberry Pi car - photoelectric encoder learning (obtaining speed)

17 "Ten Thousand Miles" Raspberry Pi Car——VSCode Learning (Compiling and Debugging)

18. "Ten Thousand Miles" Raspberry Pi Car——Makefile Learning

19 "Ten Thousand Miles" Raspberry Pi Car——VSCode Learning (Multiple C File Link Debugging)

20 "Million Miles" Raspberry Pi Car - Motor Control Learning (Control Speed)

21. "Wanli" Raspberry Pi car - motor control learning (4-wheel speed control)
22. "Wanli" Raspberry Pi car - mobile phone remote control motor rotation

23 "Wanli" Raspberry Pi car - connected to Raspberry Pi without screen

24 "Millions" Raspberry Pi Car - Bullseye Benchmark Test of Raspberry Pi 64-bit System

25 "Million Miles" Raspberry Pi Car - Nam Wheel Control

26 "Wanli" Raspberry Pi car - program startup

27 "Ten Thousand Miles" Raspberry Pi Car - Fix and Get the Raspberry Pi IP Address

28 "Wanli" Raspberry Pi car - car assembly

29 "Wanli" Raspberry Pi car - straight-driving deviation problem and new control mode

30. "Wanli" Raspberry Pi car - Phase 1 completed demonstration (introduction from scratch)

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Summary (16 articles updated): lb8820265's "Wanli" Raspberry Pi car open source sharing