- Setup a new C/C++ project
- Write a very simple code which switches an LED on and off
- Compile the project including the Arduino core
- Download to the Arduino target and run
Simple Arduino project
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Create a new C++ Project
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You have to create a C++ project even if you plan to write C code since we have to compile the Arduino Core
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If you can’t create a C/C++ Project you have probably not downloaded the Eclipse for C/C++ Developers
- Create a new C++ project named
ch.actifsource.tutorial.cip.arduino
- Choose AVR Cross Target Application
- Choose the AVR-GCC Toolchain
- Click Next
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Do not create a Debug Version
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The debug code is too large to fit on the Arduino Uno
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See boards.txt for the maximum code size
- uno.upload.maximum_size=32256 for this example
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Click Fish
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Open the C/C++ Perspective if you are asked or open it manually in the upper right corner
- For the newly created
ch.actifsource.tutorial.cip.arduino, choose Properties (Mouse-Click-Right on the project)
- Select C/C++ Build
- In the Build Variables Tab, enter the following variables:
- AVRDUDEOPTIONS, set to
-p atmega328p -c arduino -P/dev/ttyUSB0 -b 115200
- AVRTARGETFCPU, set to
16000000
- AVRTARGETMCU, set to
atmega328p
- Click Apply
- In the Environment Tab, enter the following variables:
- AVRTARGETFCPU, set to
16000000
- AVRTARGETMCU, set to
atmega328p
- Click Apply
- In the Settings Tab, set AVRDude to true. This will automatically download the program to the attached board
- Click Apply
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This step is only needed on Windows
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SimpleProject/Properties/C/C++Build/Settings/AVR Compiler/Directories
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Set Include Path C:\arduino-1.0.3\hardware\tools\avr\avr\include
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Set Include Path C:\arduino-1.0.3\hardware\arduino\cores\arduino
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Set Include Path C:\arduino-1.0.3\hardware\arduino\variants\standard
- See boards.txt (uno.build.variant) for your variant (standard for this example)
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Click OK
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Do the same again for SimpleProject/Properties/C/C++Build/Settings/AVR C++ Compiler/Directories
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Set Include Path C:\arduino-1.0.3\hardware\tools\avr\avr\include
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Set Include Path C:\arduino-1.0.3\hardware\arduino\cores\arduino
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Set Include Path C:\arduino-1.0.3\hardware\arduino\variants\standard
- See boards.txt (uno.build.variant) for your variant (standard for this example)
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Click OK
- Create a new folder
src in the project
- Create a new file
main.c in the folder src
#include <avr/io.h>
#include <util/delay.h>
#define DELAYTIME 500 // 500ms Verzögerung
int main(void)
{
DDRB |= _BV(DDB5); // Setze Pin PB5 (Arduino LED) als Ausgang
while (1) {
PORTB |= _BV(PORTB5); // LED einschalten
_delay_ms(DELAYTIME); // Wartezeit
PORTB &= ~_BV(PORTB5); // LED ausschalten
_delay_ms(DELAYTIME); // Wartezeit
}
return 0; // Dieser Punkt wird nie erreicht
}
- Write a very simple Arduino program in the file
main.c as shown above
- If you enabled Build on resource save (Auto build) in Project/Properties/C/C++Build/Behaviour before, the code should now be built
- You can also build manually by pressing Project/Build All (Ctrl+B ) or the build button in the Eclipse toolbar
Info
Your code is probably not linking if you named your file main.cpp instead if main.c
- Download your code to the Arduino
