Garren Boggs
Simple implementation of Guitar Hero with mbed.
Dependencies: 4DGL-uLCD-SE MCP23S17 SDFileSystem mbed-rtos mbed wave_player
Diff: main.cpp
- Revision:
- 0:58d424fe40b9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Mar 14 17:59:32 2016 +0000
@@ -0,0 +1,533 @@
+/*===================================================================
+--------------------- Guitar Hero mbed Program ----------------------
+
+This program recreates the classic Guitar Hero game using the mbed
+processor, along with various other peripherals, such as capacitive
+touch sensors, an IR sensor, and a uLCD display.
+
+Written for:
+ Georgia Institute of Technology
+ ECE 4180, Lab 4, Section B
+ Dr. James Hamblen
+
+Authors:
+ Garren Boggs
+ Anthony Jones
+===================================================================*/
+
+#include "mbed.h"
+#include "rtos.h" //For threading
+#include "uLCD_4DGL.h" //Display
+#include "SDFileSystem.h" //SD card functionality
+#include "wave_player.h" //For playing music
+#include "MCP23S17.h" //Serial PC for debugging
+#include <mpr121.h> //Capacitive touch sensors
+#include <stdlib.h>
+#include <time.h>
+
+#define NOTE_START 24
+#define NOTE_HEIGHT 9
+#define NOTE_WIDTH 27
+#define MISS 128
+#define SPEED 3
+#define HIT_TOP 98
+#define HIT_BOT 125
+#define VICTORY_THRESHOLD 50
+
+bool paused = false; //If paused, stop gameplay and show on screen
+bool gameOver = false; //Occurs if HP reaches zero
+bool victory = false;
+bool resetDisplay = false; //After resetting game or unpausing
+
+bool gHit = false;
+bool rHit = false;
+bool yHit = false;
+bool bHit = false;
+
+int hp = 260; //Hitpoint count
+int score = 0; //Score count
+int combo = 0; //Combo count
+int notesCreated = 0; //Victory after threshold
+
+/* Note locations. The values are the x and y positions respectively.
+ A value of -1 for these coordinates indicates that the specific
+ note is currently not on the screen. */
+int gNote[2]= {0,-1}; //Current GREEN note location.
+int rNote[2]= {NOTE_WIDTH+1,-1}; //Current RED note location.
+int yNote[2]= {2*NOTE_WIDTH+2,-1}; //Current YELLOW note location.
+int bNote[2]= {3*NOTE_WIDTH+3,-1}; //Current BLUE note location.
+
+//-------------------------------------------------------------------
+/* Instantiates the capacitive touch sensors. These will be used for
+ determining which notes have been pressed by the user. */
+
+/* Setup the i2c bus on pins 9 and 10 */
+ I2C i2c(p9, p10);
+
+/* Setup the Mpr121: */
+ Mpr121 notes(&i2c, Mpr121::ADD_VSS);
+//-------------------------------------------------------------------
+
+//-------------------------------------------------------------------
+/* Create an interrupt receiver to detect when the user has
+ strummed. */
+ InterruptIn interruptStrum(p26);
+//-------------------------------------------------------------------
+
+//-------------------------------------------------------------------
+/* Initialize SD Card Reader to import song to be played during the
+ game. */
+ SDFileSystem sd(p5, p6, p7, p8, "sd");
+
+/* Initializes the wave player to actually play the song. */
+ AnalogOut DACout (p18);
+ wave_player player(&DACout);
+//-------------------------------------------------------------------
+
+//-------------------------------------------------------------------
+/* Initializes the uLCD display as a UI for the game */
+ uLCD_4DGL uLCD(p28,p27,p30);
+
+/* Create an interrupt to allow the user to pause the game, this
+ freezing the game UI. */
+ InterruptIn interruptPause(p16);
+//-------------------------------------------------------------------
+
+//-------------------------------------------------------------------
+/* Initialize the mbed LEDs for testing and debugging purposes. */
+ DigitalOut led1(LED1);
+ DigitalOut led2(LED2);
+ DigitalOut led3(LED3);
+ DigitalOut led4(LED4);
+
+/* Setup the Serial to the PC for debugging */
+ Serial pc(USBTX, USBRX);
+ DigitalIn test(p24);
+//-------------------------------------------------------------------
+
+/*
+* Detects when the user has strum in order to play a note. This occurs
+* when the user waves a hand close to the IR sensor. If close enough,
+* the defined threshold will be passes and registered as a strum.
+*/
+void strumInterrupt()
+{
+ //For resetting a game
+ if(gameOver || victory)
+ {
+ gNote[1] = -1;
+ rNote[1] = -1;
+ yNote[1] = -1;
+ bNote[1] = -1;
+ notesCreated = 0;
+ score = 0;
+ combo = 0;
+ hp = 260;
+
+ gHit = false;
+ rHit = false;
+ yHit = false;
+ bHit = false;
+
+ resetDisplay = true;
+ paused = false;
+ gameOver = false;
+ victory = false;
+ return;
+ }
+
+ //Read values of selected notes off of capacitive touch sensor
+ int value = notes.read(0x00);
+ value += notes.read(0x01)<<8;
+
+ //Determine if a note or combination of notes is being pressed
+ if((value == 1 || value == 3 || value == 5 || value == 7 || value == 9 || value == 11 || value == 13 || value == 15) &&
+ gNote[1] < HIT_BOT && gNote[1] > HIT_TOP)
+ gHit = true;
+ if((value == 2 || value == 3 || value == 6 || value == 7 || value == 10 || value == 11 || value == 14 || value == 15) &&
+ rNote[1] < HIT_BOT && rNote[1] > HIT_TOP)
+ rHit = true;
+ if((value == 4 || value == 5 || value == 6 || value == 7 || value == 12 || value == 13 || value == 14 || value == 15) &&
+ yNote[1] < HIT_BOT && yNote[1] > HIT_TOP)
+ yHit = true;
+ if((value == 8 || value == 9 || value == 10 || value == 11 || value == 12 || value == 13 || value == 14 || value == 15) &&
+ bNote[1] < HIT_BOT && bNote[1] > HIT_TOP)
+ bHit = true;
+
+}
+
+/*
+* Updates the game display's life bar counter. If life bar drops below zero,
+* game ends.
+*/
+void updateLifeBar()
+{
+ int i;
+ int offset = 0;
+
+ //Creates life bars on the game UI for the user to know how well they are doing.
+ //If the user loses HP, the bars will decrease, and as the user repleneshes their
+ //HP, the bars will begin to rise.
+ for(i = 0; i < 8; i++)
+ {
+ if(hp < (260 - i*10))
+ uLCD.filled_rectangle(4*NOTE_WIDTH+6,3*i+offset,124,3*(i+1)+offset,BLACK);
+ else
+ uLCD.filled_rectangle(4*NOTE_WIDTH+6,3*i+offset,124,3*(i+1)+offset,GREEN);
+ offset += 2;
+ }
+ for(i = 8; i < 19; i++)
+ {
+ if(hp < (260 - i*10))
+ uLCD.filled_rectangle(4*NOTE_WIDTH+6,3*i+offset,124,3*(i+1)+offset,BLACK);
+ else
+ uLCD.filled_rectangle(4*NOTE_WIDTH+6,3*i+offset,124,3*(i+1)+offset,YELLOW);
+ offset += 2;
+ }
+ for(i = 19; i < 26; i++)
+ {
+ if(hp < (260 - i*10))
+ uLCD.filled_rectangle(4*NOTE_WIDTH+6,3*i+offset,124,3*(i+1)+offset,BLACK);
+ else
+ uLCD.filled_rectangle(4*NOTE_WIDTH+6,3*i+offset,124,3*(i+1)+offset,RED);
+ offset += 2;
+ }
+}
+
+/*
+* Initializes the game UI with the predefined background. There are
+* four specific notes the user can play, and thus there will be four
+* distinct lanes that are drawn initially.
+*/
+void setupDisplay()
+{
+ //Background display
+ uLCD.cls();
+ uLCD.background_color(BLACK);
+ uLCD.line(NOTE_WIDTH,NOTE_START-4,NOTE_WIDTH,127,WHITE);
+ uLCD.line(2*NOTE_WIDTH+1,NOTE_START-4,2*NOTE_WIDTH+1,127,WHITE);
+ uLCD.line(3*NOTE_WIDTH+2,NOTE_START-4,3*NOTE_WIDTH+2,127,WHITE);
+ uLCD.filled_rectangle(4*NOTE_WIDTH+3,0,4*NOTE_WIDTH+4,127,WHITE);
+ uLCD.filled_rectangle(126,0,127,127,WHITE);
+ uLCD.line(0,NOTE_START-4,4*NOTE_WIDTH+3,NOTE_START-4,WHITE);
+ uLCD.rectangle(0,127-(NOTE_HEIGHT+2),NOTE_WIDTH-1,127,GREEN);
+ uLCD.rectangle(NOTE_WIDTH+1,127-(NOTE_HEIGHT+2),2*NOTE_WIDTH,127,RED);
+ uLCD.rectangle(2*NOTE_WIDTH+2,127-(NOTE_HEIGHT+2),3*NOTE_WIDTH+1,127,YELLOW);
+ uLCD.rectangle(3*NOTE_WIDTH+3,127-(NOTE_HEIGHT+2),4*NOTE_WIDTH+2,127,BLUE);
+
+ //Scoreboard
+ uLCD.printf("SCORE: %d\nCOMBO: %d",score,combo);
+
+ //Initialize life bar
+ updateLifeBar();
+}
+
+/*
+* Calculates the dimensions for a specific note, based on its
+* current position.
+*/
+void calculateNoteDims(int pos[], int dims[])
+{
+ //If currently not on screen, do nothing.
+ if(pos[1] < 0 || pos[1] > MISS)
+ {
+ dims[0] = 0;
+ dims[1] = 0;
+ dims[2] = 0;
+ dims[3] = 0;
+ return;
+ }
+
+ //Otherwise calculate dimensions
+ dims[0] = pos[0]; //x-left dimension
+ dims[2] = pos[0] + NOTE_WIDTH - 1; //x-right dimension
+
+ dims[1] = (pos[1] - (NOTE_HEIGHT - 1)) > 0 ? pos[1] : 0; //y-bottom dimension
+ dims[3] = (pos[1] - (NOTE_HEIGHT - 1)) > 0 ? dims[1] + (NOTE_HEIGHT - 1) : pos[1]; //y-top dimension
+
+ return;
+}
+
+/*
+* Pauses the game.
+*/
+void pauseGame()
+{
+ if(paused)
+ {
+ resetDisplay = true;
+ }
+ paused = !paused;
+ wait(0.2);
+}
+
+/*
+* The game loop. This continuously updates the display with the notes, and
+* acts accordingly if the user has strum, and a note has been hit. If the
+* game is paused, the notes will cease movement, and a text displaying so
+* will appear on the screen.
+*/
+void playGame(void const *args)
+{
+ int gDims[4];
+ int rDims[4];
+ int yDims[4];
+ int bDims[4];
+
+ while(1)
+ {
+ if(!gameOver && !victory && !paused)
+ {
+ //Resets display if game has been reset or unpaused
+ if(resetDisplay)
+ {
+ resetDisplay = false;
+ setupDisplay();
+ }
+
+ //Update life points
+ updateLifeBar();
+
+ //Calculate respective positions and draw accordingly if notes
+ //are going on or off screen.
+ calculateNoteDims(gNote, gDims);
+ calculateNoteDims(rNote, rDims);
+ calculateNoteDims(yNote, yDims);
+ calculateNoteDims(bNote, bDims);
+
+ //Draw the notes and erase old positions
+ if(gNote[1] >= 0 && gNote[1] < MISS)
+ {
+ if(gHit)
+ {
+ gHit = false;
+ uLCD.filled_rectangle(gNote[0],gNote[1]-SPEED,gNote[0]+NOTE_WIDTH-1,gNote[1]-1,BLACK);
+ uLCD.filled_rectangle(gDims[0],gDims[1],gDims[2],gDims[3],BLACK);
+ gNote[1] = -1;
+ score += 30;
+ combo++;
+ hp = (hp + (combo >= 10 ? 10 : combo)) >= 260 ? 260 : (hp + (combo >= 10 ? 10 : combo));
+ }
+ else
+ {
+ uLCD.filled_rectangle(gNote[0],gNote[1]-SPEED,gNote[0]+NOTE_WIDTH-1,gNote[1]-1,BLACK);
+ uLCD.filled_rectangle(gDims[0],gDims[1],gDims[2],gDims[3],GREEN);
+ }
+ }
+
+ if(rNote[1] >= 0 && rNote[1] < MISS)
+ {
+ if(rHit)
+ {
+ rHit = false;
+ uLCD.filled_rectangle(rNote[0],rNote[1]-SPEED,rNote[0]+NOTE_WIDTH-1,rNote[1]-1,BLACK);
+ uLCD.filled_rectangle(rDims[0],rDims[1],rDims[2],rDims[3],BLACK);
+ rNote[1] = -1;
+ score += 30;
+ combo++;
+ hp = (hp + (combo >= 10 ? 10 : combo)) >= 260 ? 260 : (hp + (combo >= 10 ? 10 : combo));
+ }
+ else
+ {
+ uLCD.filled_rectangle(rNote[0],rNote[1]-SPEED,rNote[0]+NOTE_WIDTH-1,rNote[1]-1,BLACK);
+ uLCD.filled_rectangle(rDims[0],rDims[1],rDims[2],rDims[3],RED);
+ }
+ }
+
+ if(yNote[1] >= 0 && yNote[1] < MISS)
+ {
+ if(yHit)
+ {
+ yHit = false;
+ uLCD.filled_rectangle(yNote[0],yNote[1]-SPEED,yNote[0]+NOTE_WIDTH-1,yNote[1]-1,BLACK);
+ uLCD.filled_rectangle(yDims[0],yDims[1],yDims[2],yDims[3],BLACK);
+ yNote[1] = -1;
+ score += 30;
+ combo++;
+ hp = (hp + (combo >= 10 ? 10 : combo)) >= 260 ? 260 : (hp + (combo >= 10 ? 10 : combo));
+ }
+ else
+ {
+ uLCD.filled_rectangle(yNote[0],yNote[1]-SPEED,yNote[0]+NOTE_WIDTH-1,yNote[1]-1,BLACK);
+ uLCD.filled_rectangle(yDims[0],yDims[1],yDims[2],yDims[3],YELLOW);
+ }
+ }
+
+ if(bNote[1] >= 0 && bNote[1] < MISS)
+ {
+ if(bHit)
+ {
+ bHit = false;
+ uLCD.filled_rectangle(bNote[0],bNote[1]-SPEED,bNote[0]+NOTE_WIDTH-1,bNote[1]-1,BLACK);
+ uLCD.filled_rectangle(bDims[0],bDims[1],bDims[2],bDims[3],BLACK);
+ bNote[1] = -1;
+ score += 30;
+ combo++;
+ hp = (hp + (combo >= 10 ? 10 : combo)) >= 260 ? 260 : (hp + (combo >= 10 ? 10 : combo));
+ }
+ else
+ {
+ uLCD.filled_rectangle(bNote[0],bNote[1]-SPEED,bNote[0]+NOTE_WIDTH-1,bNote[1]-1,BLACK);
+ uLCD.filled_rectangle(bDims[0],bDims[1],bDims[2],bDims[3],BLUE);
+ }
+
+ }
+
+ //Redraw target boxes at bottom of screen, incase notes are drawn over them
+ uLCD.rectangle(0,127-(NOTE_HEIGHT+2),NOTE_WIDTH-1,127,GREEN);
+ uLCD.rectangle(NOTE_WIDTH+1,127-(NOTE_HEIGHT+2),2*NOTE_WIDTH,127,RED);
+ uLCD.rectangle(2*NOTE_WIDTH+2,127-(NOTE_HEIGHT+2),3*NOTE_WIDTH+1,127,YELLOW);
+ uLCD.rectangle(3*NOTE_WIDTH+3,127-(NOTE_HEIGHT+2),4*NOTE_WIDTH+2,127,BLUE);
+
+ //Check if each note is still on the screen. If it is, increment the position
+ gNote[1] = gNote[1] < 0 ? (rand()%100 > 95 ? NOTE_START : -2) : gNote[1] >= MISS ? -1 : (gNote[1] + SPEED);
+ if(gNote[1] == -1)
+ {
+ hp -= 10;
+ combo = 0;
+ }
+ if(gNote[1] == NOTE_START)
+ {
+ notesCreated++;
+ }
+
+ rNote[1] = rNote[1] < 0 ? (rand()%100 > 95 ? NOTE_START : -2) : rNote[1] >= MISS ? -1 : (rNote[1] + SPEED);
+ if(rNote[1] == -1)
+ {
+ hp -= 10;
+ combo = 0;
+ }
+ if(rNote[1] == NOTE_START)
+ {
+ notesCreated++;
+ }
+
+ yNote[1] = yNote[1] < 0 ? (rand()%100 > 95 ? NOTE_START : -2) : yNote[1] >= MISS ? -1 : (yNote[1] + SPEED);
+ if(yNote[1] == -1)
+ {
+ hp -= 10;
+ combo = 0;
+ }
+ if(yNote[1] == NOTE_START)
+ {
+ notesCreated++;
+ }
+
+ bNote[1] = bNote[1] < 0 ? (rand()%100 > 95 ? NOTE_START : -2) : bNote[1] >= MISS ? -1 : (bNote[1] + SPEED);
+ if(bNote[1] == -1)
+ {
+ hp -= 10;
+ combo = 0;
+ }
+ if(bNote[1] == NOTE_START)
+ {
+ notesCreated++;
+ }
+
+ //Check to make sure HP is above zero, otherwise, Game Over.
+ if(hp <= 0)
+ gameOver = true;
+
+ //Check to see if user has won.
+ if(notesCreated >= VICTORY_THRESHOLD)
+ victory = true;
+
+ uLCD.locate(0,0);
+ uLCD.printf("SCORE: %d\nCOMBO: %d",score,combo);
+ }
+ else if(gameOver)
+ {
+ //Sets up the display for a game over.
+ uLCD.cls();
+ uLCD.background_color(BLACK);
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.locate(0,0);
+ uLCD.printf("\n\nGAME OVER");
+ uLCD.locate(0,6);
+ uLCD.text_width(1.5);
+ uLCD.text_height(1.5);
+ uLCD.printf("\n\r Score: %d\n\r Combo: %d",score,combo);
+ uLCD.text_width(1);
+ uLCD.text_height(1);
+ uLCD.locate(0,11);
+ uLCD.printf("\n\r Strum to reset");
+ uLCD.locate(0,0);
+ while(gameOver)
+ {
+ wait(0.1);
+ }
+ }
+ else if(victory)
+ {
+ //Sets up the display for a victory.
+ uLCD.cls();
+ uLCD.background_color(BLACK);
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.locate(0,0);
+ uLCD.printf("\n\nYOU ROCK!");
+ uLCD.locate(0,6);
+ uLCD.text_width(1.5);
+ uLCD.text_height(1.5);
+ uLCD.printf("\n\r Score: %d\n\r Combo: %d",score,combo);
+ uLCD.text_width(1);
+ uLCD.text_height(1);
+ uLCD.locate(0,11);
+ uLCD.printf("\n\r Strum to reset");
+ uLCD.locate(0,0);
+ while(victory)
+ {
+ wait(0.1);
+ }
+ }
+ else
+ {
+ //Sets up the display for a paused game.
+ uLCD.cls();
+ uLCD.background_color(BLACK);
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.locate(0,0);
+ uLCD.printf("\n\n\n PAUSED!");
+ uLCD.text_width(1);
+ uLCD.text_height(1);
+ uLCD.locate(0,0);
+ while(paused)
+ {
+ wait(0.1);
+ }
+ }
+ }
+}
+
+int main()
+{
+ //Intialize display to show game UI
+ setupDisplay();
+
+ //Initialize the strum interrupt to act on a rising edge
+ interruptStrum.rise(&strumInterrupt);
+
+ //Initialize the pause interrupt
+ interruptPause.rise(&pauseGame);
+
+ //Initialize game loop
+ Thread gl(playGame);
+
+ //Play the song
+ FILE *fp = fopen("/sd/sound/smoke_on_the_water.wav", "r");
+ if(fp == NULL)
+ {
+ pc.printf("SD Card could not be read!");
+ }
+ else
+ {
+ // player.play(fp);
+ fclose(fp);
+ }
+
+ //Tasks for main loop (mainly debugging)
+ while(1)
+ { }
+}