What’s this Arduino code doing?

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0

I need a description of what he does.

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

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2 answers

2

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

  • Calls a function called digitalRead() passing as argument the value of the variable sensor1. What she does we have no way of knowing.
  • This function must return a boolean value, or at least 0 for false or another value that will be treated as true. If it is false, that is, if you see a 0, then the first block between keys will be executed, if any other value comes the second block after the command else shall be executed. The if is a decision command.
  • In the first block the variable speed1 to validate the value that is in the variable frente at this point in time and the variable speedv1 becomes 0.
  • If it goes to the second block speed1 will be worth 0 and speedv1 will be worth the same as voltar at this time.

0

If the sensor reading returns any information it arrow the variable speed1 with "front" and speedv1 with 0 if nothing returns, the variable speedv1 gets the value "back" and speed1 also with 0 "Zero".

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