Been trying to create a wave using the PWM ports (because this Arduino doesn't have DAC)of an Arduino Mega using this code. In the simulation I use a wave form generator that goes to A0, then I just want to convert it from 1023 bits to 255 but I get nothing as output.
int in = A0;
int out = 10;
void setup()
{
pinMode(in, INPUT);
pinMode(out, OUTPUT);
}
void loop(){
analogRead(in);
analogWrite(10, in/4);
}
Any suggestion would be great, thanks in advance!
You're discarding the returned value from analogRead
. Change:
void loop(){
analogRead(in);
analogWrite(10, in/4);
}
to:
void loop(){
int p = analogRead(in);
analogWrite(out, p / 4);
}
The pin 10 is digital output, isn't it ?
Moreover there is a function for creating a wave : tone(pin, freq, time);
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