Embedded Files
An Arduino can be programmed using the programming language C++
If you have followed the steps on the previous page, you have set up your board using digital pin 2 as an output connected to an LED. You now need to tell the Arduino to turn the LED on and off.
Load up your Arduino software from the programs menu on the computer.
Once you load up the software you should see a screen as shown in Fig 1 and Fig1a.
If you have followed the steps on the previous page, you have set up your board using digital pin 2 as an output connected to an LED. You now need to tell the Arduino to turn the LED on and off.
Load up your Arduino software from the programs menu on the computer.
Once you load up the software you should see a screen as shown in Fig 1 and Fig1a.
Fig 1
void setup() {
// put your setup code here, to run once:
}
void loop() {
// put your main code here, to run repeatedly:
}
Fig 1a
The first part of the program ‘void setup’ tells the Arduino pins whether they are to be used as Inputs or Outputs.
You only need to do this once (it runs only once). Set up this section of the program as shown in Fig 2 and Fig 2a.
Swirly brackets show the start and finish of parts of the program.
The program is case sensitive.
The part indicated with ‘//’ is a comment section saying what each part of the program does –Always use comments to explain your code so you can remember what it does and share it with other people!
You only need to do this once (it runs only once). Set up this section of the program as shown in Fig 2 and Fig 2a.
Swirly brackets show the start and finish of parts of the program.
The program is case sensitive.
The part indicated with ‘//’ is a comment section saying what each part of the program does –Always use comments to explain your code so you can remember what it does and share it with other people!
void setup() {
// put your setup code here, to run once:
pinMode(2, OUTPUT);
}
Fig 2a
You are now able to start the main part of your programme ‘void loop’ (This part loops continuously).
Look at Fig 3 and Fig 3a and copy it into your program – Note that the command ‘digitalWrite’ tells the Arduino to signal a digital pin. In this case we are signalling pin 2 to turn on by giving it the command to go ‘High’.
We are setting a ‘delay’ of half a second and then signalling pin 2 to go ‘Low’ which will turn off the LED and set another time ‘delay’.
You have now successfully completed a simple program ready to test.
Look at Fig 3 and Fig 3a and copy it into your program – Note that the command ‘digitalWrite’ tells the Arduino to signal a digital pin. In this case we are signalling pin 2 to turn on by giving it the command to go ‘High’.
We are setting a ‘delay’ of half a second and then signalling pin 2 to go ‘Low’ which will turn off the LED and set another time ‘delay’.
You have now successfully completed a simple program ready to test.
void setup() {
// put your setup code here, to run once:
pinMode(2, OUTPUT); //set Pin 2 to be an Output
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(2, HIGH); // turn on LED in Output 2)
delay(500); //wait for half a second
digitalWrite(2, LOW); //Turn LED off in Output 2
delay(500); // wait for half a second
}
Fig 3a
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