File content as of revision 31:9e843820d76e:
/**
@file main.cpp
@brief Game Algorithm implementation
*/
#include "main.h"
int main()
{
//set_time(0); // enter unix time then delete from main function to set time
power = 1;
lcd.init();
calibrateJoystick(); // get centred values of joystick
pollJoystick.attach(&updateJoystick,1.0/15.0); // read joystick 15 times per second
wallMovement.attach(&flagForWall,0.2); // call function flagForWall to make flag=1, every 0.2 seconds
wallMovement2.attach(&flagForWall2,0.2); // call function flagForWall2 to make flag=1, every 0.2 seconds
wallMovement3.attach(&flagForWall3,0.2); // call function flagForWall3 to make flag=1, every 0.2 seconds
flash.attach(&flagForFlash,1); // call function flagForWall3 to make flag=1, every 1 seconds
button.rise(&buttonFlag); // call flag when ever joystick button is pressed
menu();
}
void calibrateJoystick()
{
button.mode(PullDown); // must not move while calibrating
joystick.x0 = xPot; // initial positions in the range 0.0 to 1.0 (0.5 if centred exactly)
joystick.y0 = yPot;
}
void updateJoystick()
{
joystick.x = xPot - joystick.x0; // reads current joystick values relative to calibrated values (in range -0.5 to 0.5, 0.0 is centred)
joystick.y = yPot - joystick.y0;
joystick.button = button;
/* calculate direction depending on x,y values */
/* tolerance allows a little lee-way in case joystick not exactly in the stated direction */
if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
joystick.direction = CENTRE;
} else if ( joystick.y > DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
joystick.direction = UP;
} else if ( joystick.y < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
joystick.direction = DOWN;
} else if ( joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
joystick.direction = RIGHT;
} else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
joystick.direction = LEFT;
} else if ( joystick.y > DIRECTION_TOLERANCE && joystick.x > DIRECTION_TOLERANCE) {
joystick.direction = upRight;
} else if ( joystick.y < DIRECTION_TOLERANCE && joystick.x > DIRECTION_TOLERANCE) {
joystick.direction = downRight;
} else if ( joystick.y > DIRECTION_TOLERANCE && joystick.x < DIRECTION_TOLERANCE) {
joystick.direction = upLeft;
} else if ( joystick.y < DIRECTION_TOLERANCE && joystick.x < DIRECTION_TOLERANCE) {
joystick.direction = downLeft;
}
printFlag = 1; // set flag for printing
}
void clearCells()
{
for (int i = 0; i < nx ; i++) { // loops through cells in x direction first
for (int j = 0; j < ny ; j++) { // then moves in y direction
lcd.clearPixel(i,j); // clears each pixel that is checked
}
}
lcd.refresh(); // must refresh to write buffer display
}
void flagForWall()
{
FLAG=1;
}
void flagForWall2()
{
FLAG2=1;
}
void flagForWall3()
{
FLAG3=1;
}
void buttonFlag()
{
BFlag =1;
}
void menu()
{
int m = 0;
BFlag = 0;
char buffer[14]; // buffer used to store time string
while(1) {
powerSave(); // call sleep function
clearCells();
time_t seconds = time(NULL); // gets current time
strftime(buffer, 14 , "%H:%M", localtime(&seconds)); // send time string to buffer
lcd.printString(buffer,26,4); // show time on lcd screen
if ((joystick.direction == RIGHT)||(joystick.direction == upRight)||(joystick.direction == downRight)) {
m++;
}
if ((joystick.direction == LEFT)||(joystick.direction == upLeft)||(joystick.direction == downLeft)) {
m--;
}
if(m > 2) {
m = 0;
}
if(m < 0) {
m = 2;
}
switch (m) {
case 0 :
lcd.printString("< Play Game >",0,2);
wait(0.3);
if(BFlag) {
BFlag=0;
clearCells();
playGame();
}
break;
case 1 :
lcd.printString("< Settings >",0,2);
wait(0.3);
if(BFlag) {
BFlag=0;
clearCells();
BandVMenu();
}
break;
case 2 :
lcd.printString("< HighScore >",0,2);
wait(0.3);
if(BFlag) {
BFlag=0;
clearCells();
while(1) {
readDataFromFile();
lcd.printString("HighScore",16,0);
if(joystick.direction == DOWN) {
menu();
}
}
}
break;
}
}
}
void playGame()
{
/* reset variables */
i=24;
j=42;
x = 0;
y = 0;
z = 30;
a = 0;
b = 47;
d = 30;
f = 0;
g = 0;
h = 24;
q = 83;
w = 0;
e = 24;
score = 0;
u = 0;
lcd.printString("GO!",35,2);
wait(1);
while(1) {
if(soundFlag==1) { // if mute hasn't been toggled in settings then the song will play
tone();
}
lcd.drawRect(i,j,2,2,0); // draws player object
clearCells();
fallingWalls();
boundries();
playerMovement();
if (lcd.getPixel(i,j)) { // if wall meets player object then there is a collision
scoreCheck();
int m = 1;
GameOverFlash(); // this means that it is game over
if (soundFlag == 1) {
deadTone();
}
while(1) {
clearCells();
if ((joystick.direction == RIGHT)||(joystick.direction == upRight)||(joystick.direction == downRight)) { // reads joystick direction and counts down
m--;
}
if ((joystick.direction == LEFT)||(joystick.direction == upLeft)||(joystick.direction == downLeft)) { // reads joystick direction and counts up
m++;
}
if(m > 2) { // stops counter from going above total number of cases
m = 2;
}
if(m < 0) { // stops counter from going below zero
m = 0;
}
switch (m) { //switches to the case that the counter is on
case 0 :
lcd.printString("YES",0,3);
if(BFlag) {
BFlag=0;
clearCells();
playGame();
}
break;
case 1 :
lcd.printString("Play Again?",9,1);
lcd.printString("Yes No",0,3);
wait(0.3);
break;
case 2 :
lcd.printString("NO",70,3);
if(BFlag) {
BFlag = 0;
clearCells();
lcd.printString("Leaving Game",0,2);
wait(1.0);
menu();
}
break;
}
}
}
if (lcd.getPixel(i+2,j)) { // same as above but for different side of player object
scoreCheck();
clearCells();
int m = 1;
GameOverFlash();
if (soundFlag == 1) {
deadTone();
}
while(1) {
clearCells();
if ((joystick.direction == RIGHT)||(joystick.direction == upRight)||(joystick.direction == downRight)) {
m--;
}
if ((joystick.direction == LEFT)||(joystick.direction == upLeft)||(joystick.direction == downLeft)) {
m++;
}
if(m > 2) {
m = 2;
}
if(m < 0) {
m = 0;
}
switch (m) {
case 0 :
lcd.printString("YES",0,3);
if(BFlag) {
BFlag = 0;
clearCells();
playGame();
}
break;
case 1 :
lcd.printString("Play Again?",9,1);
lcd.printString("Yes No",0,3);
wait(0.3);
break;
case 2 :
lcd.printString("NO",70,3);
if(BFlag) {
BFlag = 0;
clearCells();
lcd.printString("Leaving Game",0,2);
wait(1.0);
menu();
}
break;
}
}
}
if (lcd.getPixel(i+2,j+2)) {
scoreCheck();
clearCells();
int m = 1;
GameOverFlash();
if (soundFlag == 1) {
deadTone();
}
while(1) {
clearCells();
if ((joystick.direction == RIGHT)||(joystick.direction == upRight)||(joystick.direction == downRight)) {
m--;
}
if ((joystick.direction == LEFT)||(joystick.direction == upLeft)||(joystick.direction == downLeft)) {
m++;
}
if(m > 2) {
m = 2;
}
if(m < 0) {
m = 0;
}
switch (m) {
case 0 :
lcd.printString("YES",0,3);
if(BFlag) {
BFlag = 0;
clearCells();
playGame();
}
break;
case 1 :
lcd.printString("Play Again?",9,1);
lcd.printString("Yes No",0,3);
wait(0.3);
break;
case 2 :
lcd.printString("NO",70,3);
if(BFlag) {
BFlag = 0;
clearCells();
lcd.printString("Leaving Game",0,2);
wait(1.0);
menu();
}
break;
}
}
}
if (lcd.getPixel(i,j+2)) {
scoreCheck();
clearCells();
int m = 1;
GameOverFlash();
if (soundFlag == 1) {
deadTone();
}
while(1) {
clearCells();
if ((joystick.direction == RIGHT)||(joystick.direction == upRight)||(joystick.direction == downRight)) {
m--;
}
if ((joystick.direction == LEFT)||(joystick.direction == upLeft)||(joystick.direction == downLeft)) {
m++;
}
if(m > 2) {
m = 2;
}
if(m < 0) {
m = 0;
}
switch (m) {
case 0 :
lcd.printString("YES",0,3);
if(BFlag) {
BFlag = 0;
clearCells();
playGame();
}
break;
case 1 :
lcd.printString("Play Again?",9,1);
lcd.printString("Yes No",0,3);
wait(0.3);
break;
case 2 :
lcd.printString("NO",70,3);
if(BFlag) {
BFlag = 0;
clearCells();
lcd.printString("Leaving Game",0,2);
wait(1.0);
menu();
}
break;
}
}
}
}
}
void BandVMenu()
{
int t = 0;
while(1) {
wait(0.2);
clearCells();
if ((joystick.direction == RIGHT)||(joystick.direction == upRight)||(joystick.direction == downRight)) {
t++;
}
if ((joystick.direction == LEFT)||(joystick.direction == upLeft)||(joystick.direction == downLeft)) {
t--;
}
if(t > 2) {
t = 0;
}
if(t < 0) {
t = 2;
}
if(joystick.direction == DOWN) {
clearCells();
lcd.printString("Returning",18,2);
lcd.printString("to Menu",24,3);
wait(0.5);
menu();
}
switch (t) {
case 0 :
lcd.printString("< Brightness >",0,2);
if(BFlag) {
BFlag = 0;
brightness();
}
break;
case 1 :
lcd.printString("< Volume >",0,2);
if(BFlag) {
BFlag = 0;
volume();
}
break;
case 2 :
lcd.printString("<Instructions>",0,2);
if(BFlag) {
BFlag = 0;
instructions();
}
break;
}
}
}
void brightness()
{
while(1) {
wait(0.2);
clearCells();
if ((joystick.direction == RIGHT)||(joystick.direction == upRight)||(joystick.direction == downRight)) {
bright--;
}
if ((joystick.direction == LEFT)||(joystick.direction == upLeft)||(joystick.direction == downLeft)) {
bright++;
}
if(bright > 3) {
bright = 3;
}
if(bright < -3) {
bright = -3;
}
switch (bright) {
case 0 :
lcd.printString(" Brightness ",0,2);
lcd.printString(" ||||||",0,4);
lcd.setBrightness(0.6);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case 1 :
lcd.printString(" Brightness ",0,2);
lcd.printString(" ||||||||",0,4);
lcd.setBrightness(0.8);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case 2 :
lcd.printString(" Brightness ",0,2);
lcd.printString(" ||||||||||",0,4);
lcd.setBrightness(0.9);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case 3 :
lcd.printString(" Brightness ",0,2);
lcd.printString(" ||||||||||||",0,4);
lcd.setBrightness(1);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case -1 :
lcd.printString(" Brightness ",0,2);
lcd.printString(" ||||",0,4);
lcd.setBrightness(0.4);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case -2 :
lcd.printString(" Brightness ",0,2);
lcd.printString(" ||",0,4);
lcd.setBrightness(0.2);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case -3 :
lcd.printString(" Brightness ",0,2);
lcd.setBrightness(0);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
}
}
}
void volume()
{
while(1) {
wait(0.2);
clearCells();
if ((joystick.direction == RIGHT)||(joystick.direction == upRight)||(joystick.direction == downRight)) {
vol--;
}
if ((joystick.direction == LEFT)||(joystick.direction == upLeft)||(joystick.direction == downLeft)) {
vol++;
}
if(vol > 3) {
vol = 3;
}
if(vol < -3) {
vol = -3;
}
switch (vol) {
case 0 :
lcd.printString(" Volume ",0,2);
lcd.printString(" ||||||",0,4);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case 1 :
lcd.printString(" Volume ",0,2);
lcd.printString(" ||||||||",0,4);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case 2 :
lcd.printString(" Volume ",0,2);
lcd.printString(" ||||||||||",0,4);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case 3 :
lcd.printString(" Volume ",0,2);
lcd.printString(" ||||||||||||",0,4);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case -1 :
lcd.printString(" Volume ",0,2);
lcd.printString(" ||||",0,4);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case -2 :
lcd.printString(" Volume ",0,2);
lcd.printString(" ||",0,4);
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
case -3 :
lcd.printString(" Volume ",0,2);
lcd.printString(" MUTE",0,4);
soundFlag = 0;
if(BFlag) {
BFlag = 0;
BandVMenu();
}
break;
}
}
}
void writeDataToFile()
{
time_t seconds = time(NULL); // get current time
char buffer2[14]; // buffer used to store time string
strftime(buffer2, 14, " %d/%m/%y", localtime(&seconds)); // displays unix time in day/ month/ year format and sends it to buffer
FILE *fp = fopen("/local/score.txt", "w"); // open file called 'score.txt'
/* if the file doesn't exist it is created, if it exists, data is updated */
fprintf(fp,"%i%s",score,buffer2); // print integer for score and date to file
fclose(fp); // close file
}
void readDataFromFile()
{
int score1; // states the score to be read from the file is an integer value
char buffer2recieved[14]; // buffer to recieve the string of data read from the text file
FILE *fp2 = fopen("/local/score.txt", "r"); // open 'score.txt'
fscanf (fp2,"%i%s",&score1,buffer2recieved); // scans text file for an integer followed by a string
fclose(fp2); // close file
char Points[14]; // buffer to store score value
sprintf(Points,"%i",score1); // send score to buffer (Points)
lcd.printString(Points,39,2); // print score on LCD
lcd.printString(buffer2recieved,18,4); // print date on LCD
}
void tone()
{
if(FLAG3==1) {
FLAG3 = 0;
buz.period(1/(frequency[u])); // set PWM period
buz=0.2;
u++;
}
if( u > 30) {
u = 0;
}
}
void deadTone()
{
int l = 0;
while(1) {
if(FLAG3==1) {
FLAG3 = 0;
buz.period(1/(frequency2[l])); // set PWM period
buz=0.2;
l++;
}
if( l > 6) {
break;
}
}
}
void scoreCheck()
{
int score1;
FILE *fp2 = fopen("/local/score.txt", "r");
fscanf (fp2,"%i",&score1);
fclose(fp2);
if(score1 < score) {
writeDataToFile(); // if the score is bigger then the data is written to the file and overwrites the previous data
}
}
void flagForFlash()
{
flashFlag = 1;
}
void GameOverFlash()
{
int flash = 0;
while(1) {
if (flashFlag==1) { // flag equals one every second
flashFlag = 0; // flag is reset
lcd.printString("Game Over!",12,2); // print phrase
flash++; // adds one to counter
}
if (flash > 3) { // moves onto next function when counter gets to 3
break;
}
}
}
void powerSave()
{
if(joystick.direction == CENTRE) {
if (flashFlag==1) {
flashFlag = 0;
sleepCounter++;
}
if(sleepCounter > 20) {
Sleep(); // put mbed into sleep mode
lcd.turnOff(); // turn LCD off
while(1){
if(BFlag) {
BFlag = 0;
lcd.init(); // turn LCD back on
sleepCounter = 0;
wait(0.5);
menu();
}
}
}
} else {
sleepCounter = 0;
}
}
void boundries()
{
if( j > 45) {
j = 45;
}
if( i > 81) {
i = 81;
}
if( j < 0) {
j = 0;
}
if( i < 0) {
i = 0;
}
}
void playerMovement()
{
if (printFlag) { // if flag set, clear flag and implicate joystick functions
printFlag = 0;
/* check joystick direction */
if (joystick.direction == UP) {
j--;
}
if (joystick.direction == DOWN) {
j++;
}
if (joystick.direction == LEFT) {
i++;
}
if (joystick.direction == RIGHT) {
i--;
}
if (joystick.direction == upRight) {
j--;
i--;
}
if (joystick.direction == downRight) {
j++;
i--;
}
if (joystick.direction == upLeft) {
j--;
i++;
}
if (joystick.direction == downLeft) {
j++;
i++;
}
if (joystick.direction == CENTRE) {
i=i;
j=j;
}
}
}
void fallingWalls()
{
lcd.drawLine(x,y,z,y,1); // draws a line at the top of the screen to symbolise a wall
lcd.drawLine(z+10,y,83,y,1); // there is a gap in the wall which is 10 pixels wide and the objective of the game is to pass through it
if(FLAG==1) { // the flag changes every 0.2 seconds
FLAG=0;
y++; // everytime the flag changes to one it is reset and the wall moves down by one pixel
}
if(y > 47) { // when the wall reaches the bottom a new wall is generated at the top
y = 0;
z = rand()%74; // the gap in the is moved to a random postion in the new wall
score++; // score increases by one everytime a wall falling from the top reaches the bottom of the screen
}
/* there are 6 levels of difficulty */
if(( score > 1)&&(score < 5)) {
lcd.drawLine(a,b,d,b,1);
lcd.drawLine(d+10,b,83,b,1);
if(FLAG3==1) {
FLAG3=0;
b--;
}
}
if(b < 0) {
b = 47;
d = rand()%74;
}
if(( score > 5)&&(score < 9)) {
lcd.drawLine(f,g,f,h,1);
lcd.drawLine(f,h+10,f,47,1);
if(FLAG2==1) {
FLAG2=0;
f++;
}
}
if( f > 83) {
f = 0;
h = rand()%38;
}
if(( score > 10)&&(score < 15)) {
lcd.drawLine(q,w,q,e,1);
lcd.drawLine(q,e+10,q,47,1);
if(FLAG3==1) {
FLAG3=0;
q--;
}
}
if(q < 0) {
q = 83;
e = rand()%38;
}
if( score > 15) {
lcd.drawLine(q,w,q,e,1);
lcd.drawLine(q,e+10,q,47,1);
if(FLAG3==1) {
FLAG3=0;
q--;
}
}
if( score > 20) {
lcd.drawLine(a,b,d,b,1);
lcd.drawLine(d+10,b,83,b,1);
if(FLAG2==1) {
FLAG2=0;
b--;
}
}
}
void instructions()
{
while(1) {
lcd.printString("Welcome :-)",9,0);
lcd.printString("Select using",6,1);
lcd.printString("joystickButton",0,2);
lcd.printString("Press >",27,4);
wait(0.5);
if(BFlag) {
BFlag = 0; // press joystick button to continue
clearCells();
while(1) {
lcd.printString("Return to menu",0,0);
lcd.printString("by moving the",3,1);
lcd.printString("JS downward",9,2);
if(joystick.direction == DOWN) { // direct joystick down to continue
menu();
break;
}
}
}
}
}