What is this Arduino code doing?

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#1 by (2 votes)

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I need a description of what it does.

if( ! digitalRead(sensor1)) {
    speed1 = frente;
    speedv1=0;
} else {
    speed1 = 0;
    speedv1 = voltar;
}

c arduino

asked by anonymous 27.08.2018 / 21:56

1 answer

score 2 · Answer 1

The ideal would be to see the context, but reading it gives to say:

Calls a function called digitalRead() passing as an argument the value of the variable sensor1 . What she does we can not know.
This function should return a Boolean value, or at least a 0 for false or other value that will be treated as true. If it is false, that is, if a 0 comes, then the first block in braces will be executed, if any other value comes the second block after the else command will be executed. if is a decision command.
In the first block the variable speed1 to be worth the value that is in the variable frente at this moment and the variable speedv1 is worth 0.
If it is for the second block speed1 it will be worth 0 and speedv1 will be the same as voltar at this moment.