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Using Arduino / Programming Questions / Re: Need some help for a science project.
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on: January 21, 2013, 09:19:04 pm
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// Multi Sweep, Duane B
// Using the servo library created by Michael Margolis
// to control 12 Servos with one Arduino Uno
#include <Servo.h>
// Sample sketch for driving 12 Servos from an Arduino UNO, servos are attached to digital pins 2,3,4,5,6,7,8,9,10,11,12,13
#define CONNECTED_SERVOS 12
// macro just adds two - the first servo is attached to digital pin 2, this gives us upto 12 servos - digital 2 to 13
#define SERVO_TO_PIN(x) (x+2)
Servo myServos[CONNECTED_SERVOS];
#define COUNT_DOWN -1
#define COUNT_UP +1
#define INCREMENT 10 // move in steps of 10 milliseconds
int nPulseWidth = DEFAULT_PULSE_WIDTH ; // 1500, defined in servo.h
int nDirection = COUNT_UP;
volatile unsigned long ulStart = 0;
volatile unsigned long ulStartToEnd = 0;
void setup()
{
// attach the servos
for(int nServo = 0;nServo < CONNECTED_SERVOS;nServo++)
{
myServos[nServo].attach(SERVO_TO_PIN(nServo));
}
// the library sets all servos to 1500 ms pulse width by default, this is center for a steering servo
Serial.begin(9600);
Serial.println("Completed setup");
}
void loop()
{
delay(10); // give the servos time to move after each update
if(ulStartToEnd)
{
Serial.println(ulStartToEnd);
ulStartToEnd = 0;
}
nPulseWidth += nDirection * INCREMENT;
if(nPulseWidth >= 2000)
{
nPulseWidth = 2000;
nDirection = COUNT_DOWN;
}
if(nPulseWidth <= 1000)
{
nPulseWidth = 1000;
nDirection = COUNT_UP;
}
for(int nServo = 0;nServo < CONNECTED_SERVOS;nServo++)
{
myServos[nServo].writeMicroseconds(nPulseWidth);
}
}
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