sparkfun Ardumoto Kit, Hook-Up Manual

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/* Ardumoto Example Sketch
by: Jim Lindblom
date: November 8, 2013
license: Public domain. Please use, reuse, and modify this
sketch!
Adapted to v20 hardware by: Marshall Taylor
date: March 31, 2017
Three useful functions are defined:
setupArdumoto() ­­ Setup the Ardumoto Shield pins
driveArdumoto([motor], [direction], [speed]) ­­ Drive [mot
or]
(0 for A, 1 for B) in [direction] (0 or 1) at a [speed]
between 0 and 255. It will spin until told to stop.
stopArdumoto([motor]) ­­ Stop driving [motor] (0 or 1).
setupArdumoto() is called in the setup().
The loop() demonstrates use of the motor driving functions.
*/
// Clockwise and counter ­ clockwise definitions.
// Depending on how you wired your motors, you may need to swa
p.
#define
FORWARD 0
#define REVERSE 1
// Motor definitions to make life easier:
#define MOTOR_A 0
#define MOTOR_B 1
// Pin Assignments //
//Default pins:
#define DIRA 2 // Direction control for motor A
#define PWMA 3 // PWM control (speed) for motor A
#define DIRB 4 // Direction control for motor B
#define PWMB 11 // PWM control (speed) for motor B
////Alternate pins:
//#define DIRA 8 // Direction control for motor A
//#define PWMA 9 // PWM control (speed) for motor A
//#define DIRB 7 // Direction control for motor B
//#define PWMB 10 // PWM control (speed) for motor B
void setup()
{
setupArdumoto(); // Set all pins as outputs
}
void loop()
{
// Drive motor A (and only motor A) at various speeds, then
stop.
driveArdumoto(MOTOR_A, REVERSE, 255); // Set motor A to REVE
RSE at max
delay(1000); // Motor A will spin as set for 1 second
driveArdumoto(MOTOR_A, FORWARD, 127); // Set motor A to FOR
WARD at half
delay(1000); // Motor A will keep trucking for 1 second
stopArdumoto(MOTOR_A); // STOP motor A
// Drive motor B (and only motor B) at various speeds, then
stop.
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