Hi everybody,
I'm relatively new to the more advanced Arduino world - but I'm a quite experienced programmer in other respects. As I plan to develop quite a few Arduino libraries in the near future, I decided to setup Eclipse for the purpose. It wasn't easy, but I managed to make it work: I can build and upload the demo project found on Github.
I have a lot of different Arduinos, but for testing Eclipse I stick to an Uno to make things a little easier.
I tried creating a template library and after a little struggle I managed to make it work. So far, so good: Like most programmers the code for now is primarily cut-n-paste, so I'm sure it'll look familiar and pretty simple.
The executable has a simple main.ccp like this:
#include <Arduino.h>
#include <rrTest.h>
int main(void) {
init();
setup();
for (;;)
loop();
return 0;
}
rrTest Lcd;
void setup() {
pinMode(13, OUTPUT);
}
void loop() {
Lcd.blink(500);
}
Next I have an rrTest.h:
#ifndef RRTEST_H
#define RRTEST_H
#include <Arduino.h>
class rrTest {
public:
rrTest();
~rrTest();
void on();
void off();
void blink(int time);
};
#endif /* RRTEST_H */
And finally rrTest.cpp:
#include "rrTest.h" //include the declaration for this class
#include <Arduino.h>
const byte LED_PIN = 13; //use the LED @ Arduino pin 13, this should not change so make it const (constant)
//<<constructor>> setup the LED, make pin 13 an OUTPUT
rrTest::rrTest(){
pinMode(LED_PIN, OUTPUT); //make that pin an OUTPUT
}
//<<destructor>>
rrTest::~rrTest(){/*nothing to destruct*/}
//turn the LED on
void rrTest::on(){
digitalWrite(LED_PIN,HIGH); //set the pin HIGH and thus turn LED on
}
//turn the LED off
void rrTest::off(){
digitalWrite(LED_PIN,LOW); //set the pin LOW and thus turn LED off
}
//blink the LED in a period equal to paramterer -time.
void rrTest::blink(int time){
on(); //turn LED on
delay(time/2); //wait half of the wanted period
off(); //turn LED off
delay(time/2); //wait the last half of the wanted period
}
Surprisingly, this works. XD
Then I started cleaning up my cut-n-paste: A lot has been cleaned up already, but a single issue remains: The observant reader might have noticed the call to pinMode() in the setup() routine in main.cpp: This initialization is unwanted - so I tried to remove it.
But if I do, I cannot compile the executable any more. Actually, it fails whilst trying to link the rrTest module:
Building target: ttRemote.elf
Invoking: AVR C++ Linker
avr-g++ -Wl,-Map,ttRemote.map,--cref -L"C:\Users\lars\Dropbox\Eclipse\Arduino\rrTest\Debug" -L"C:\Users\lars\Dropbox\Eclipse\Arduino\Arduino-Blink-Eclipse-Project\ArduinoCore\328P_16MHz" -mmcu=atmega328p -o "ttRemote.elf" ./main.o -lArduinoCore -lrrTest
C:\Users\lars\Dropbox\Eclipse\Arduino\rrTest\Debug\librrTest.a(rrTest.o): In function `rrTest::~rrTest()':
C:\Users\lars\Dropbox\Eclipse\Arduino\rrTest\Debug/../rrTest.cpp:19: undefined reference to `digitalWrite'
C:\Users\lars\Dropbox\Eclipse\Arduino\rrTest\Debug/../rrTest.cpp:19: undefined reference to `digitalWrite'
C:\Users\lars\Dropbox\Eclipse\Arduino\rrTest\Debug/../rrTest.cpp:19: undefined reference to `pinMode'
C:\Users\lars\Dropbox\Eclipse\Arduino\rrTest\Debug/../rrTest.cpp:19: undefined reference to `pinMode'
make: *** [ttRemote.elf] Error 1If I reinsert the call to pinMode() in setup() of main.cpp, the code compiles just fine again.
Can anyone explain what goes on here?
