Basic Library

Digital I/O
Analog I/O
Advanced I/O
Time
Math
Trigonometry
Random Numbers
Bits and Bytes
Interrupts
Serial Comm.

Standard Library

Camera
Servo Motor
Stepping Motor
Character LCD
SPI
I2C (Wire)
SD Card
SD (File Operations)
Periodic Operation
Clock (RTC)

Mbed Tips

Overview
Storage
Wi-Fi
TLS (HTTPS)
Audio
Microphone
BLE

Stepping Motor (Stepper Class)

This library enables control of stepping motors connected to the GR-LYCHEE board. To use, specify #include <stepper.h>.

Stepper()

Description
This constructor creates Stepper Class instances.
Syntax
Stepper(steps, pin1, pin2)
Stepper(steps, pin1, pin2, pin3, pin4)
Parameters
steps: The number of steps in one revolution (360 degrees) of the motor. 100 indicates 3.6 degrees per step. (int)
pins 1 - 4: Pins for connection to a motor.
Returns
None

setSpeed

Description
Sets the motor speed in rotations per minute (RPMs).
Syntax
setSpeed(long rpms)
Parameters
rpms: The speed at which the motor should turn in rotations per minute [rpm]
Returns
None

step

Description
Turns the motor a specific number of steps.
Syntax
step(int steps)
Parameters
steps: The number of steps to turn the motor - positive to turn one direction, negative to turn the other
Returns
None

Sample Program


#include <Arduino.h>
#include <Stepper.h>

// change this to the number of steps on your motor
#define STEPS 100
    
// create an instance of the stepper class, specifying
// the number of steps of the motor and the pins it's
// attached to
Stepper stepper(STEPS, 8, 9, 10, 11);
    
// the previous reading from the analog input
int previous = 0;
    
void setup()
{
    // set the speed of the motor to 30 RPMs
    stepper.setSpeed(30);
}
    
void loop()
{
    // get the sensor value
    int val = analogRead(A0);
    
    // move a number of steps equal to the change in the
    // sensor reading
    stepper.step(val - previous);
    
    // remember the previous value of the sensor
    previous = val;
}