/***************************************************************************

Music.c

****************************************************************************/

#include "Music.h"

/*-------------------------- Module Constants -----------------------------*/

const static char msWait = 100;

/*------------------------- Module Definitions ----------------------------*/

/*-------------------------- Module Variables -----------------------------*/

static char isPlaying;

/*-------------------------- Module Functions -----------------------------*/

static void wait(unsigned int);

static void pressPlay(void);

static void pressNext(void);

/*---------------------------- Module Code ------------------------------*/

//Initialize

void initMusic(void) {

pressPlay();

wait(1500);

pressPlay(); //The next time PLAY is pressed, music will start automatically

isPlaying = 0;

}

void playMusic(void) {

if (isPlaying == 0){ //if MP3 player is currently not playing, press NEXT to restart the track

isPlaying = 1;

pressNext();

}

else {

//do nothing if the MP3 player is already playing music

}

}

void stopMusic(void) {

if(isPlaying) { //if MP3 is currently playing, press PLAY to PAUSE

isPlaying = 0;

pressPlay();

}

}

void restartMusic(void) {

pressNext(); //press NEXT to restart music

isPlaying = 1;

}

//PLAY is M4 output

static void pressPlay(void) {

PTM = PTM | BIT4HI; //set M4 hi

wait(msWait);

PTM = PTM & BIT4LO; //set M4 lo

}

//NEXT is M5 output

static void pressNext(void) {

PTM = PTM | BIT5HI;

wait(msWait);

PTM = PTM & BIT5LO;

}

//delay for a specified number of ms

static void wait(unsigned int ms) {

unsigned int myTime = 0;

myTime = TMRS12_GetTime();

//wait until the current time minus the start time is greater than the wait time

while ((TMRS12_GetTime() - myTime) < ms) {};

}