ELEC2645 (2015/16)
Snake and Physics based jumping game with high scores and different difficulties.
Dependencies: N5110 SDFileSystem mbed
Diff: main.cpp
- Revision:
- 5:ae641b1d04fa
- Parent:
- 4:c2d920b17b14
--- a/main.cpp Wed Apr 27 12:43:34 2016 +0000
+++ b/main.cpp Wed May 04 15:01:20 2016 +0000
@@ -3,7 +3,7 @@
@file main.cpp
@brief Program Implementation
-@brief Revision 1.0
+@brief Revision 1.1
@author Joel W. Webb
*/
@@ -30,21 +30,23 @@
DirectionName direction; // current direction
};
typedef struct JoyStick Joystick;
-/// Joystick struct for storing data about default Joystick position and Current position
+/// Global Joystick struct for storing data about default Joystick position and Current position
Joystick joystick;
+
/// Ticker interrput for polling the joystick
Ticker pollJoystick;
/// Ticker for controlling refresh rate of games
Ticker gametick;
+/// Ticker for sctrolling the refresh rate of the display
+Ticker screentick;
/// File pointer for accessing SD card locations
-FILE *fp;
+FILE *fp = NULL;
int main()
{
initInputs();
playSound(tune_intro);
- // Initialise file pointer
int snakeDifficulty = 1;
int plinkDifficulty = 0;
@@ -84,7 +86,7 @@
lcd.printString("No Results",0,0);
wait(2.0);
} else { // opened file so can write
- while ( ! (g_buttonA_flag || g_buttonjoy_flag)) {
+ while ( ! (g_buttonA_flag | g_buttonjoy_flag)) {
fscanf(fp,"%d",&stored_top_score); // ensure data type matches - note address operator (&)
fclose(fp); // ensure you close the file after reading
lcd.printString("Highscore:",10,0);
@@ -108,6 +110,7 @@
// Selected Plink
else if (select == 1) {
+
// If select = 3 or -1 then user has chosen 'Back' button
while( !(select == 3 || select ==-1) ) {
@@ -156,10 +159,7 @@
}
}
}
-
- sleep();
}
-
}
@@ -310,10 +310,12 @@
// Appropriate strings printed to LCD
lcd.printString("Game Over",20,0);
- if (current_high_score != -1 && current_high_score < score) {
+ if (current_high_score == -2) {
+ lcd.printString("New High Score:",0,1);
+ } else if (current_high_score != -1 && current_high_score < score) {
lcd.printString("New High Score",0,1);
lcd.printString("Previously",0,3);
- } else if (current_high_score != -1 && current_high_score > score) {
+ } else if (current_high_score != -1 && current_high_score >= score) {
lcd.printString("Score",0,1);
lcd.printString("High Score",0,3);
} else {
@@ -325,7 +327,7 @@
sprintf(buffer,"%d",score);
lcd.printString(buffer,20,2);
// Print previous high-score
- if (current_high_score != -1) {
+ if (current_high_score != -1 && current_high_score != -2) {
char str[14];
sprintf(str,"%d",current_high_score);
lcd.printString(str,20,4);
@@ -352,16 +354,19 @@
// Initialise plink variables
pvar = initpvar(pvar);
-
// Game ticker
int refreshRate = 100;
float tickerDelay = 1.0/refreshRate;
pvar.tickerDelay = tickerDelay;
gametick.attach(&gametick_isr,tickerDelay);
+ // Update screen 30 fps
+ tickerDelay = 1.0/30.0;
+ screentick.attach(&screentick_isr,tickerDelay);
wait(0.25);
while(!pvar.gameOver) {
if (g_gametick_flag) {
+ g_gametick_flag = 0;
// Screen scrolling
pvar = plinkScroll(pvar);
@@ -381,10 +386,10 @@
gametick.detach();
lcd.clear();
-
+
// Handle high scores and printing game over messages to LCD
pvar = plinkGameOver(pvar);
-
+
}
plinkvar initpvar(plinkvar pvar)
@@ -526,7 +531,7 @@
default:
error();
}
- }
+ }
// If the powerup has been missed then generate new one
else if (pvar.powerUp.y > 47+pvar.powerUpRadius) {
pvar.powerUp.x = rand()%(84-1-(pvar.powerUpRadius*2)) + pvar.powerUpRadius;
@@ -571,75 +576,79 @@
}
plinkvar plinkDrawScreen(plinkvar pvar)
{
- // Drawing on lcd
- lcd.clear();
- // Drawing ball/blob
- // If second blob stage
- int noPlatform = 1;
- if (pvar.ballRadius == 2) {
+ if (g_screentick_flag) {
+ g_screentick_flag = 0;
+ // Drawing on lcd
+ lcd.clear();
+ // Print Current Score
+ char buffer[14];
+ sprintf(buffer,"Score: %d",pvar.height);
+ lcd.printString(buffer,0,0);
+ // Drawing ball/blob
+ // If second blob stage
+ int noPlatform = 1;
+ if (pvar.ballRadius == 2) {
+ for (int i=0; i<20; i++) {
+ if ( (int)pvar.pos.y == (pvar.platforms[i].y - 2) && (int)pvar.pos.x > pvar.platforms[i].x-pvar.platformWidth-2 && (int)pvar.pos.x < pvar.platforms[i].x+pvar.platformWidth+2 ) {
+ noPlatform = 0;
+ lcd.drawRect(pvar.pos.x-2,pvar.pos.y-1,4,2,1); // X, Y, Width, Height, Fill
+ lcd.setPixel(pvar.pos.x-1,pvar.pos.y-2);
+ lcd.setPixel(pvar.pos.x,pvar.pos.y-2);
+ lcd.setPixel(pvar.pos.x+1,pvar.pos.y-2);
+ lcd.setPixel(pvar.pos.x-3,pvar.pos.y+1);
+ lcd.setPixel(pvar.pos.x+3,pvar.pos.y+1);
+ }
+ // If third blob stage
+ else if ( (int)pvar.pos.y == (pvar.platforms[i].y - 1) && (int)pvar.pos.x > pvar.platforms[i].x-pvar.platformWidth-2 && (int)pvar.pos.x < pvar.platforms[i].x+pvar.platformWidth+2 ) {
+ noPlatform = 0;
+ lcd.drawRect(pvar.pos.x-3,pvar.pos.y-1,6,1,1); // X, Y, Width, Height, Fill
+ lcd.setPixel(pvar.pos.x-4,pvar.pos.y);
+ lcd.setPixel(pvar.pos.x+4,pvar.pos.y);
+ lcd.setPixel(pvar.pos.x-2,pvar.pos.y-2);
+ lcd.setPixel(pvar.pos.x-1,pvar.pos.y-2);
+ lcd.setPixel(pvar.pos.x,pvar.pos.y-2);
+ lcd.setPixel(pvar.pos.x+1,pvar.pos.y-2);
+ lcd.setPixel(pvar.pos.x+2,pvar.pos.y-2);
+ }
+ }
+ }
+ // Else default blob stage
+ if (noPlatform == 1) {
+ lcd.drawCircle((int)pvar.pos.x,(int)pvar.pos.y,pvar.ballRadius,1); // X, Y, Radius, Fill
+ lcd.refresh();
+ }
+ // Platforms and boundaries drawing
for (int i=0; i<20; i++) {
- if ( (int)pvar.pos.y == (pvar.platforms[i].y - 2) && (int)pvar.pos.x > pvar.platforms[i].x-pvar.platformWidth-2 && (int)pvar.pos.x < pvar.platforms[i].x+pvar.platformWidth+2 ) {
- noPlatform = 0;
- lcd.drawRect(pvar.pos.x-2,pvar.pos.y-1,4,2,1); // X, Y, Width, Height, Fill
- lcd.setPixel(pvar.pos.x-1,pvar.pos.y-2);
- lcd.setPixel(pvar.pos.x,pvar.pos.y-2);
- lcd.setPixel(pvar.pos.x+1,pvar.pos.y-2);
- lcd.setPixel(pvar.pos.x-3,pvar.pos.y+1);
- lcd.setPixel(pvar.pos.x+3,pvar.pos.y+1);
+ if (pvar.platforms[i].y > 0) {
+ lcd.drawRect( pvar.platforms[i].x-pvar.platformWidth ,pvar.platforms[i].y,pvar.platformWidth*2,1,1); // X, Y, Width, Height, Fill
}
- // If third blob stage
- else if ( (int)pvar.pos.y == (pvar.platforms[i].y - 1) && (int)pvar.pos.x > pvar.platforms[i].x-pvar.platformWidth-2 && (int)pvar.pos.x < pvar.platforms[i].x+pvar.platformWidth+2 ) {
- noPlatform = 0;
- lcd.drawRect(pvar.pos.x-3,pvar.pos.y-1,6,1,1); // X, Y, Width, Height, Fill
- lcd.setPixel(pvar.pos.x-4,pvar.pos.y);
- lcd.setPixel(pvar.pos.x+4,pvar.pos.y);
- lcd.setPixel(pvar.pos.x-2,pvar.pos.y-2);
- lcd.setPixel(pvar.pos.x-1,pvar.pos.y-2);
- lcd.setPixel(pvar.pos.x,pvar.pos.y-2);
- lcd.setPixel(pvar.pos.x+1,pvar.pos.y-2);
- lcd.setPixel(pvar.pos.x+2,pvar.pos.y-2);
- }
+ }
+ lcd.drawLine(0,0,0,47,1); // x0,y0,x1,y1,type
+ lcd.drawLine(83,0,83,47,1);
+ // PowerUp drawing
+ if (pvar.powerUp.y > 0-pvar.powerUpRadius && pvar.powerUp.y < 47+pvar.powerUpRadius) {
+ lcd.drawRect(pvar.powerUp.x-pvar.powerUpRadius,pvar.powerUp.y-pvar.powerUpRadius,10,10,0); // X, Y, Width, Height, Fill
+ lcd.setPixel(pvar.powerUp.x,pvar.powerUp.y+3);
+ lcd.setPixel(pvar.powerUp.x,pvar.powerUp.y+1);
+ lcd.setPixel(pvar.powerUp.x+1,pvar.powerUp.y);
+ lcd.setPixel(pvar.powerUp.x+2,pvar.powerUp.y-1);
+ lcd.setPixel(pvar.powerUp.x+2,pvar.powerUp.y-2);
+ lcd.setPixel(pvar.powerUp.x+1,pvar.powerUp.y-3);
+ lcd.setPixel(pvar.powerUp.x,pvar.powerUp.y-3);
+ lcd.setPixel(pvar.powerUp.x-1,pvar.powerUp.y-3);
+ lcd.setPixel(pvar.powerUp.x-2,pvar.powerUp.y-2);
+ }
+
+ lcd.refresh();
+ // Looks more pleasing when the ball pauses to bounce
+ if (noPlatform == 0) {
+ wait(0.03);
}
}
- // Else default blob stage
- if (noPlatform == 1) {
- lcd.drawCircle((int)pvar.pos.x,(int)pvar.pos.y,pvar.ballRadius,1); // X, Y, Radius, Fill
- lcd.refresh();
- }
- // Platforms and boundaries drawing
- for (int i=0; i<20; i++) {
- if (pvar.platforms[i].y > 0) {
- lcd.drawRect( pvar.platforms[i].x-pvar.platformWidth ,pvar.platforms[i].y,pvar.platformWidth*2,1,1); // X, Y, Width, Height, Fill
- }
- }
- lcd.drawLine(0,0,0,47,1); // x0,y0,x1,y1,type
- lcd.drawLine(83,0,83,47,1);
- // PowerUp drawing
- if (pvar.powerUp.y > 0-pvar.powerUpRadius && pvar.powerUp.y < 47+pvar.powerUpRadius) {
- lcd.drawRect(pvar.powerUp.x-pvar.powerUpRadius,pvar.powerUp.y-pvar.powerUpRadius,10,10,0); // X, Y, Width, Height, Fill
- lcd.setPixel(pvar.powerUp.x,pvar.powerUp.y+3);
- lcd.setPixel(pvar.powerUp.x,pvar.powerUp.y+1);
- lcd.setPixel(pvar.powerUp.x+1,pvar.powerUp.y);
- lcd.setPixel(pvar.powerUp.x+2,pvar.powerUp.y-1);
- lcd.setPixel(pvar.powerUp.x+2,pvar.powerUp.y-2);
- lcd.setPixel(pvar.powerUp.x+1,pvar.powerUp.y-3);
- lcd.setPixel(pvar.powerUp.x,pvar.powerUp.y-3);
- lcd.setPixel(pvar.powerUp.x-1,pvar.powerUp.y-3);
- lcd.setPixel(pvar.powerUp.x-2,pvar.powerUp.y-2);
- }
-
- lcd.refresh();
- // Looks more pleasing when the ball pauses to bounce
- if (noPlatform == 0) {
- wait(0.03);
- }
- char buffer[14];
- sprintf(buffer,"Score: %d",pvar.height);
- lcd.printString(buffer,0,0);
-
return pvar;
}
-plinkvar plinkGameOver(plinkvar pvar){
+plinkvar plinkGameOver(plinkvar pvar)
+{
// Handle saving high scores to SD card
// Read previous highscore if one exists
fp = fopen("/sd/plinkhighscore.txt", "r");
@@ -665,11 +674,13 @@
// Appropriate strings printed to LCD
lcd.printString("Game Over",20,0);
- if (current_high_score != -1 && current_high_score < pvar.height) {
+ if (current_high_score == -2) {
+ lcd.printString("New High Score:",0,1);
+ } else if (current_high_score != -1 && current_high_score < pvar.height) {
lcd.printString("New High Score",0,1);
lcd.printString("Previously",0,3);
- } else if (current_high_score != -1 && current_high_score > pvar.height) {
- lcd.printString("Score",0,1);
+ } else if (current_high_score != -1 && current_high_score >= pvar.height) {
+ lcd.printString("Score:",0,1);
lcd.printString("High Score",0,3);
} else {
lcd.printString("Score:",0,1);
@@ -680,7 +691,7 @@
sprintf(buffer,"%d",pvar.height);
lcd.printString(buffer,20,2);
// Print previous high-score
- if (current_high_score != -1) {
+ if (current_high_score != -1 && current_high_score != -2) {
char str[14];
sprintf(str,"%d",current_high_score);
lcd.printString(str,20,4);
@@ -714,6 +725,10 @@
{
g_gametick_flag = 1;
}
+void screentick_isr()
+{
+ g_screentick_flag = 1;
+}
// Initialises Inputs
@@ -734,6 +749,7 @@
/// Testing LCD display works (splash screen)
lcd.init();
wait(0.5);
+ lcd.setBrightness(0.5); // Brightness set to maximum duty cycle so it isn't affected by changing frequency of buzzer
lcd.printString("Calibrating",8,0);
lcd.printString("Do not move",8,1);
lcd.printString("Joystick",18,2);
@@ -743,14 +759,43 @@
calibrateJoystick();
/// read joystick 10 times per second
pollJoystick.attach(&updateJoystick,1.0/10.0);
- // Patch for sd casrd access not working first time
- fp = fopen("sd/test.txt","w");
+
+ // Patch for sd card access not working first time
+ fp = fopen("/sd/test.txt", "w");
if (fp != NULL) {
fclose(fp);
}
+ fp = fopen("/sd/test.txt", "w");
+ if (fp != NULL) {
+ fclose(fp); // ensure you close the file after writing
+ }
+
+ // If file does not exist then create it
+ fp = fopen("/sd/plinkhighscore.txt","r");
+ if (fp == NULL) {
+ fp = fopen("/sd/plinkhighscore.txt","w");
+ if (fp != NULL) {
+ fprintf(fp,"%d",-2);
+ fclose(fp);
+ }
+ } else {
+ fclose(fp);
+ }
+
+ fp = fopen("/sd/snakehighscore.txt","r");
+ if (fp == NULL) {
+ fp = fopen("/sd/snakehighscore.txt","w");
+ if (fp != NULL) {
+ fprintf(fp,"%d",-2);
+ fclose(fp);
+ }
+ } else {
+ fclose(fp);
+ }
+
wait(1.0);
- lcd.clear();
}
+
// Hangs on an error
void error()
{