/* Program to send 440 Hz signal to the buzzer on Wytec EduBase/EduPad board 
 * with Tiva TM4C123/MSP432.
 * This program toggles the output pin 37 at 440 Hz using 1126 ms delay
 * between toggles. Pin 37 is connected to the speaker on the board.
 * 
 * Energia 1.6.10E18
 */

const int BUZZER = 37;
const int HALF_PERIOD = 1126;
void setup() {                
  // initialize the digital pin as an output.
  pinMode(BUZZER, OUTPUT);     
}

void loop() {
  digitalWrite(BUZZER, HIGH);   // turn the signal to buzzer high
  delayMicroseconds(HALF_PERIOD);      // wait for half cycle
  digitalWrite(BUZZER, LOW);    // turn the signal to buzzer low
  delayMicroseconds(HALF_PERIOD);      // wait for half cycle
}