INSERT A VARIABLE.

Projects Programming
1

i've try this program

//declare variables for the motor pins
int motorPin1 = 2; // Blue - 28BYJ48 pin 1
int motorPin2 = 3; // Pink - 28BYJ48 pin 2
int motorPin3 = 4; // Yellow - 28BYJ48 pin 3
int motorPin4 = 5; // Orange - 28BYJ48 pin 4
// Red - 28BYJ48 pin 5 (VCC)

void setup() {
pinMode(motorPin1, OUTPUT);
pinMode(motorPin2, OUTPUT);
pinMode(motorPin3, OUTPUT);
pinMode(motorPin4, OUTPUT);

digitalWrite(motorPin1,LOW);
digitalWrite(motorPin2,LOW);
digitalWrite(motorPin3,LOW);
digitalWrite(motorPin4,LOW);
int leitura; //define a variavel leitura que corresponde a uma letra o teclado
Serial.begin(9600);

}

void loop(){
int x=1;
int i=0;
x = Serial.read();
if (x > 2 ) {
for (i=0; i>65; i++) {
digitalWrite(motorPin1,LOW);
digitalWrite(motorPin4,HIGH);
delay(x);

digitalWrite(motorPin4,HIGH);
digitalWrite(motorPin3,HIGH);
delay(x);

digitalWrite(motorPin4,LOW);
digitalWrite(motorPin3,HIGH);

delay(x);

digitalWrite(motorPin4,LOW);
digitalWrite(motorPin2,HIGH);
digitalWrite(motorPin3,HIGH);
delay(x);

digitalWrite(motorPin2,HIGH);
digitalWrite(motorPin3,LOW);
delay(x);

digitalWrite(motorPin2,HIGH);
digitalWrite(motorPin1,HIGH);
delay(x);

digitalWrite(motorPin2,LOW);
digitalWrite(motorPin1,HIGH);
delay(x);

digitalWrite(motorPin1,HIGH);
digitalWrite(motorPin4,HIGH);
delay(x);
} }

}

but it does not work as it should, I want to make a program that the delay I enter on the keyboard and make the "for" routine 64 times ( this is my PWM, is for a stepper motor) , using the variable that I enter (I control the frequency controlling the variable). and when I run it I insert the variable, nothing happens. SOMEONE can help?

2

What range of values do you expect to get for x and values do you actually get when you read the serial input, especially as you do not check before reading it that there is something to be read.

3

Subtle hint...

 for (i=0; i>65; i++) {
4

read up on using serial.

  1. Most 99.9999% of the time x will be -1 the result of reading when there is no data.

  2. If you type 1 in the serial monitor serial.read() will return 48(the vaule used to represent the char '1') and then 13(cr) and then 10 (LF) read up on ascii

Mark