Justin Eng
This is a ball on the Mbed.
Dependencies: 4DGL-uLCD-SE IMUfilter ITG3200 Music mbed-rtos mbed
Revision 0:680348a938f8, committed 2014-03-14
- Comitter:
- Strikewolf
- Date:
- Fri Mar 14 17:03:16 2014 +0000
- Commit message:
- Initial commit;
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/4DGL-uLCD-SE.lib Fri Mar 14 17:03:16 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/4180_1/code/4DGL-uLCD-SE/#e39a44de229a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/IMU_RPY.h Fri Mar 14 17:03:16 2014 +0000
@@ -0,0 +1,284 @@
+
+
+ /**
+ * IMU filter example.
+ *
+ * Calculate the roll, pitch and yaw angles.
+ */
+ #include "IMUfilter.h"
+ #include "ADXL345_I2C.h"
+ #include "ITG3200.h"
+
+ //Gravity at Earth's surface in m/s/s
+ #define g0 9.812865328
+ //Number of samples to average.
+ #define SAMPLES 4
+ //Number of samples to be averaged for a null bias calculation
+ //during calibration.
+ #define CALIBRATION_SAMPLES 128
+ //Convert from radians to degrees.
+ #define toDegrees(x) (x * 57.2957795)
+ //Convert from degrees to radians.
+ #define toRadians(x) (x * 0.01745329252)
+ //ITG-3200 sensitivity is 14.375 LSB/(degrees/sec).
+ #define GYROSCOPE_GAIN (1 / 14.375)
+ //Full scale resolution on the ADXL345 is 4mg/LSB.
+ #define ACCELEROMETER_GAIN (0.004 * g0)
+ //Sampling gyroscope at 200Hz.
+ #define GYRO_RATE 0.005
+ //Sampling accelerometer at 200Hz.
+ #define ACC_RATE 0.005
+ //Updating filter at 40Hz.
+ #define FILTER_RATE 0.1
+
+ Serial pc(USBTX, USBRX);
+
+ //At rest the gyroscope is centred around 0 and goes between about
+ //-5 and 5 counts. As 1 degrees/sec is ~15 LSB, error is roughly
+ //5/15 = 0.3 degrees/sec.
+ IMUfilter imuFilter(FILTER_RATE, 0.3);
+ ADXL345_I2C accelerometer(p28, p27);
+ ITG3200 gyroscope(p28, p27);
+ Ticker accelerometerTicker;
+ Ticker gyroscopeTicker;
+ Ticker filterTicker;
+
+ //Offsets for the gyroscope.
+ //The readings we take when the gyroscope is stationary won't be 0, so we'll
+ //average a set of readings we do get when the gyroscope is stationary and
+ //take those away from subsequent readings to ensure the gyroscope is offset
+ //or "biased" to 0.
+ double w_xBias;
+ double w_yBias;
+ double w_zBias;
+
+ //Offsets for the accelerometer.
+ //Same as with the gyroscope.
+ double a_xBias;
+ double a_yBias;
+ double a_zBias;
+
+ //Accumulators used for oversampling and then averaging.
+ volatile double a_xAccumulator = 0;
+ volatile double a_yAccumulator = 0;
+ volatile double a_zAccumulator = 0;
+ volatile double w_xAccumulator = 0;
+ volatile double w_yAccumulator = 0;
+ volatile double w_zAccumulator = 0;
+
+ //Accelerometer and gyroscope readings for x, y, z axes.
+ volatile double a_x;
+ volatile double a_y;
+ volatile double a_z;
+ volatile double w_x;
+ volatile double w_y;
+ volatile double w_z;
+
+ //Buffer for accelerometer readings.
+ int readings[3];
+ //Number of accelerometer samples we're on.
+ int accelerometerSamples = 0;
+ //Number of gyroscope samples we're on.
+ int gyroscopeSamples = 0;
+
+ /**
+ * Prototypes
+ */
+ //Set up the ADXL345 appropriately.
+ void initializeAcceleromter(void);
+ //Calculate the null bias.
+ void calibrateAccelerometer(void);
+ //Take a set of samples and average them.
+ void sampleAccelerometer(void);
+ //Set up the ITG3200 appropriately.
+ void initializeGyroscope(void);
+ //Calculate the null bias.
+ void calibrateGyroscope(void);
+ //Take a set of samples and average them.
+ void sampleGyroscope(void);
+ //Update the filter and calculate the Euler angles.
+ void filter(void);
+
+ void initializeAccelerometer(void)
+ {
+
+ //Go into standby mode to configure the device.
+ accelerometer.setPowerControl(0x00);
+ //Full resolution, +/-16g, 4mg/LSB.
+ accelerometer.setDataFormatControl(0x0B);
+ //200Hz data rate.
+ accelerometer.setDataRate(ADXL345_200HZ);
+ //Measurement mode.
+ accelerometer.setPowerControl(0x08);
+ //See http://www.analog.com/static/imported-files/application_notes/AN-1077.pdf
+ wait_ms(22);
+
+ }
+
+ void sampleAccelerometer(void)
+ {
+
+ //Have we taken enough samples?
+ if (accelerometerSamples == SAMPLES) {
+
+ //Average the samples, remove the bias, and calculate the acceleration
+ //in m/s/s.
+ a_x = ((a_xAccumulator / SAMPLES) - a_xBias) * ACCELEROMETER_GAIN;
+ a_y = ((a_yAccumulator / SAMPLES) - a_yBias) * ACCELEROMETER_GAIN;
+ a_z = ((a_zAccumulator / SAMPLES) - a_zBias) * ACCELEROMETER_GAIN;
+
+ a_xAccumulator = 0;
+ a_yAccumulator = 0;
+ a_zAccumulator = 0;
+ accelerometerSamples = 0;
+
+ } else {
+ //Take another sample.
+ accelerometer.getOutput(readings);
+
+ a_xAccumulator += (int16_t) readings[0];
+ a_yAccumulator += (int16_t) readings[1];
+ a_zAccumulator += (int16_t) readings[2];
+
+ accelerometerSamples++;
+
+ }
+
+ }
+
+ void calibrateAccelerometer(void)
+ {
+
+ a_xAccumulator = 0;
+ a_yAccumulator = 0;
+ a_zAccumulator = 0;
+
+ //Take a number of readings and average them
+ //to calculate the zero g offset.
+ for (int i = 0; i < CALIBRATION_SAMPLES; i++) {
+
+ accelerometer.getOutput(readings);
+
+ a_xAccumulator += (int16_t) readings[0];
+ a_yAccumulator += (int16_t) readings[1];
+ a_zAccumulator += (int16_t) readings[2];
+
+ wait(ACC_RATE);
+
+ }
+
+ a_xAccumulator /= CALIBRATION_SAMPLES;
+ a_yAccumulator /= CALIBRATION_SAMPLES;
+ a_zAccumulator /= CALIBRATION_SAMPLES;
+
+ //At 4mg/LSB, 250 LSBs is 1g.
+ a_xBias = a_xAccumulator;
+ a_yBias = a_yAccumulator;
+ a_zBias = (a_zAccumulator - 250);
+
+ a_xAccumulator = 0;
+ a_yAccumulator = 0;
+ a_zAccumulator = 0;
+
+ }
+
+ void initializeGyroscope(void)
+ {
+
+ //Low pass filter bandwidth of 42Hz.
+ gyroscope.setLpBandwidth(LPFBW_42HZ);
+ //Internal sample rate of 200Hz. (1kHz / 5).
+ gyroscope.setSampleRateDivider(4);
+
+ }
+
+ void calibrateGyroscope(void)
+ {
+
+ w_xAccumulator = 0;
+ w_yAccumulator = 0;
+ w_zAccumulator = 0;
+
+ //Take a number of readings and average them
+ //to calculate the gyroscope bias offset.
+ for (int i = 0; i < CALIBRATION_SAMPLES; i++) {
+
+ w_xAccumulator += gyroscope.getGyroX();
+ w_yAccumulator += gyroscope.getGyroY();
+ w_zAccumulator += gyroscope.getGyroZ();
+ wait(GYRO_RATE);
+
+ }
+
+ //Average the samples.
+ w_xAccumulator /= CALIBRATION_SAMPLES;
+ w_yAccumulator /= CALIBRATION_SAMPLES;
+ w_zAccumulator /= CALIBRATION_SAMPLES;
+
+ w_xBias = w_xAccumulator;
+ w_yBias = w_yAccumulator;
+ w_zBias = w_zAccumulator;
+
+ w_xAccumulator = 0;
+ w_yAccumulator = 0;
+ w_zAccumulator = 0;
+
+ }
+
+ void sampleGyroscope(void)
+ {
+
+ //Have we taken enough samples?
+ if (gyroscopeSamples == SAMPLES) {
+
+ //Average the samples, remove the bias, and calculate the angular
+ //velocity in rad/s.
+ w_x = toRadians(((w_xAccumulator / SAMPLES) - w_xBias) * GYROSCOPE_GAIN);
+ w_y = toRadians(((w_yAccumulator / SAMPLES) - w_yBias) * GYROSCOPE_GAIN);
+ w_z = toRadians(((w_zAccumulator / SAMPLES) - w_zBias) * GYROSCOPE_GAIN);
+
+ w_xAccumulator = 0;
+ w_yAccumulator = 0;
+ w_zAccumulator = 0;
+ gyroscopeSamples = 0;
+
+ } else {
+ //Take another sample.
+ w_xAccumulator += gyroscope.getGyroX();
+ w_yAccumulator += gyroscope.getGyroY();
+ w_zAccumulator += gyroscope.getGyroZ();
+
+ gyroscopeSamples++;
+
+ }
+
+ }
+
+ void filter(void)
+ {
+
+ //Update the filter variables.
+ imuFilter.updateFilter(w_y, w_x, w_z, a_y, a_x, a_z);
+ //Calculate the new Euler angles.
+ imuFilter.computeEuler();
+
+ }
+
+ void rpy_init()
+ {
+ //Initialize inertial sensors.
+ initializeAccelerometer();
+ calibrateAccelerometer();
+ initializeGyroscope();
+ calibrateGyroscope();
+
+
+ //Set up timers.
+ //Accelerometer data rate is 200Hz, so we'll sample at this speed.
+ accelerometerTicker.attach(&sampleAccelerometer, 0.005);
+ //Gyroscope data rate is 200Hz, so we'll sample at this speed.
+ gyroscopeTicker.attach(&sampleGyroscope, 0.005);
+ //Update the filter variables at the correct rate.
+ filterTicker.attach(&filter, FILTER_RATE);
+ }
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/IMUfilter.lib Fri Mar 14 17:03:16 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/aberk/code/IMUfilter/#8a920397b510
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ITG3200.lib Fri Mar 14 17:03:16 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/aberk/code/ITG3200/#b098d99dd81e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Music.lib Fri Mar 14 17:03:16 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mdu7078/code/Music/#c33ed3d85f97
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Mar 14 17:03:16 2014 +0000
@@ -0,0 +1,384 @@
+ #include <math.h>
+ #include <time.h>
+
+ #include "mbed.h"
+ #include "uLCD_4DGL.h"
+ #include "rtos.h"
+ #include "IMU_RPY.h"
+
+ // game configuration macros
+ #define NUMBER_OF_ROUNDS 3
+ #define CURSOR_SPEED 0.5
+ #define CURSOR_COLOR 0xFFFF00
+ #define SPACE_COLOR BLACK
+ #define WALL_COLOR RED
+ #define START_COLOR GREEN
+ #define END_COLOR BLUE
+
+ // game mechanism macros
+ #define MAZE_DIMENSION 25
+ #define SCALAR (125 / MAZE_DIMENSION)
+ #define START_BLOCK 3
+ #define END_BLOCK 2
+ #define WALL_BLOCK 1
+ #define SPACE_BLOCK 0
+
+ // prototypes in alphabetical order
+ bool checkVictory();
+ void displaySplashScreen();
+ void displayMaze();
+ void displayVictory();
+ void displayEndGame();
+ void generateMaze();
+ void depthFirstSearch(int r, int c);
+ void updateVelocity();
+ void updateBall();
+ void xthread(void const *args);
+ void ythread(void const *args);
+
+ // display variables
+ uLCD_4DGL uLCD(p9, p10, p11);
+
+ // cursor variables
+ Mutex x_mutex, y_mutex;
+ char cursor_x_pos, cursor_y_pos;
+ char old_cursor_x_pos, old_cursor_y_pos;
+ float ballxvel, ballyvel;
+
+ // start and end variables
+ char start_x, start_y;
+ char end_x, end_y;
+
+ // maze data structure
+ char maze[MAZE_DIMENSION][MAZE_DIMENSION];
+
+ // level counter
+ char level = 0;
+
+ int main()
+ {
+ pc.printf("Super Mbed Ball!!!!!\n\r");
+
+ // set up gyroscope/accelerometer (rpy = roll, pitch, yaw)
+ rpy_init();
+
+ //Overclock uLCD
+ uLCD.baudrate(3000000);
+
+ //Title Screen
+ displaySplashScreen();
+
+ //Start physics engine threads
+ Thread t1(xthread);
+ Thread t2(ythread);
+
+ // each iteration runs a complete game until user wins.
+ // wait for user to complete max allowed levels before
+ // terminating
+ while(level < NUMBER_OF_ROUNDS) {
+
+ //Initial velocity
+ ballxvel = 0;
+ ballyvel = 0;
+
+ //create Maze
+ generateMaze();
+ displayMaze();
+
+ //Game Execution Loop
+ while (checkVictory() == false) {
+ updateVelocity();
+ updateBall();
+ }
+
+ // victory splash screen
+ displayVictory();
+
+ // increment level counter
+ level++;
+ }
+
+ // display last end game screen before exiting program
+ displayEndGame();
+ }
+
+ // checks if cursor has moved to the end block
+ bool checkVictory()
+ {
+ // check if cursor made it to end row and column
+ return(maze[cursor_x_pos][cursor_y_pos] == END_BLOCK);
+ }
+
+ // depth first search, called by generateMaze()
+ void depthFirstSearch(int r, int c)
+ {
+ // 4 random direction
+ int randDirs1[] = {1, 2, 3, 4};
+ int randDirs2[] = {4, 2, 3, 1};
+ int *randDirs = NULL;
+
+ if (rand() % 2)
+ randDirs = randDirs1;
+ else
+ randDirs = randDirs2;
+
+ // Examine each direction
+ for (int i = 0; i < 4; i++) {
+ switch (randDirs[i]) {
+ case 1: // Up
+ // Whether 2 cells up is out or not
+ if (r - 2 <= 0)
+ continue;
+ if (maze[r - 2][c] != 0) {
+ maze[r - 2][c] = SPACE_BLOCK;
+ maze[r - 1][c] = SPACE_BLOCK;
+ depthFirstSearch(r - 2, c);
+ }
+ break;
+ case 2: // Right
+ // Whether 2 cells to the right is out or not
+ if (c + 2 >= MAZE_DIMENSION - 1)
+ continue;
+ if (maze[r][c + 2] != 0) {
+ maze[r][c + 2] = SPACE_BLOCK;
+ maze[r][c + 1] = SPACE_BLOCK;
+ depthFirstSearch(r, c + 2);
+ }
+ break;
+ case 3: // Down
+ // Whether 2 cells down is out or not
+ if (r + 2 >= MAZE_DIMENSION - 1)
+ continue;
+ if (maze[r + 2][c] != 0) {
+ maze[r + 2][c] = SPACE_BLOCK;
+ maze[r + 1][c] = SPACE_BLOCK;
+ depthFirstSearch(r + 2, c);
+ }
+ break;
+ case 4: // Left
+ // Whether 2 cells to the left is out or not
+ if (c - 2 <= 0)
+ continue;
+ if (maze[r][c - 2] != 0) {
+ maze[r][c - 2] = SPACE_BLOCK;
+ maze[r][c - 1] = SPACE_BLOCK;
+ depthFirstSearch(r, c - 2);
+ }
+ break;
+ }
+ }
+ }
+
+ //Take whats in the mazearr and write it
+ void displayMaze()
+ {
+
+ // Clear previous maze
+ uLCD.filled_rectangle(0, 0, 127, 127, SPACE_COLOR);
+
+ // display start location
+ uLCD.filled_rectangle(start_x * SCALAR, start_y * SCALAR,
+ (start_x + 1) * SCALAR - 1, (start_y + 1) * SCALAR - 1, START_COLOR);
+
+ // display end location
+ uLCD.filled_rectangle(end_x * SCALAR, end_y * SCALAR,
+ (end_x + 1) * SCALAR - 1, (end_y + 1) * SCALAR - 1, END_COLOR);
+
+ // display walls of maze
+ for (int i = 0; i < MAZE_DIMENSION; i++) {
+ for (int j = 0; j < MAZE_DIMENSION; j++) {
+ if (maze[i][j] == WALL_BLOCK)
+ uLCD.filled_rectangle(i * SCALAR, j * SCALAR, (i + 1) * SCALAR - 1, (j + 1) * SCALAR - 1, WALL_COLOR);
+ }
+ }
+ }
+
+ //Game title screen
+ void displaySplashScreen()
+ {
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.locate(0, 0);
+ uLCD.printf("SuperMbed");
+ uLCD.text_width(2);
+ uLCD.text_height(3);
+ uLCD.locate(2, 1);
+ uLCD.printf("Ball!");
+ wait(3);
+ }
+
+ //Victory screen - 5 sec delay and then next level
+ void displayVictory()
+ {
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.locate(1, 3);
+ uLCD.printf("VICTORY!");
+ wait(5);
+ }
+
+ // End game screen
+ void displayEndGame() {
+ // wipe screen
+ uLCD.filled_rectangle(0, 0, 127, 127, BLACK);
+
+ // write game over
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.locate(1, 3);
+ uLCD.printf("GAME OVER");
+ }
+
+ // randomely generates a maze using depth first search
+ void generateMaze()
+ {
+ // Initialize all spaces to walls
+ for (int i = 0; i < MAZE_DIMENSION; i++)
+ for (int j = 0; j < MAZE_DIMENSION; j++)
+ maze[i][j] = WALL_BLOCK;
+
+ // unused z-value of gyroscope will be random seed
+ srand(imuFilter.getYaw());
+
+ // calculate starting row and column of maze DFS
+ // starting row and column must be an odd number
+ int seed = 0;
+ while(seed % 2 == 0)
+ seed = rand() % (MAZE_DIMENSION -1) + 1;
+
+ pc.printf("seed: %d\r\n", seed);
+
+ // Starting cell
+ maze[seed][seed] = SPACE_BLOCK;
+
+ // Allocate the maze with recursive method
+ depthFirstSearch(seed, seed);
+
+ // find start and end positions
+ start_x = start_y = 0xF;
+ end_x = end_y = 0;
+ for (int i = 0; i < MAZE_DIMENSION; i++) {
+ for (int j = 0; j < MAZE_DIMENSION; j++) {
+
+ if (maze[i][j] == SPACE_BLOCK) {
+ // start space
+ if((i*MAZE_DIMENSION + j) < (start_x*MAZE_DIMENSION + start_y)) {
+ start_x = i;
+ start_y = j;
+ }
+
+ // end space
+ if((i*MAZE_DIMENSION + j) > (end_x*MAZE_DIMENSION + end_y)) {
+ end_x = i;
+ end_y = j;
+ }
+ }
+ }
+ }
+
+ // reset cursor starting position
+ cursor_x_pos = old_cursor_x_pos = start_x;
+ cursor_y_pos = old_cursor_y_pos = start_y;
+
+ // mark spots in maze data structure
+ maze[start_x][start_y] = START_BLOCK;
+ maze[end_x][end_y] = END_BLOCK;
+
+ }
+
+ //Move the ball around and draw to the screen
+ void updateBall()
+ {
+ x_mutex.lock();
+ y_mutex.lock();
+
+ // redraw ball only if the position has changed
+ if (cursor_x_pos != old_cursor_x_pos || cursor_y_pos != old_cursor_y_pos) {
+
+ //Wipe the old ball
+
+ uLCD.filled_rectangle(old_cursor_x_pos * SCALAR, old_cursor_y_pos * SCALAR,
+ (old_cursor_x_pos + 1) * SCALAR - 1, (old_cursor_y_pos + 1) * SCALAR - 1, SPACE_COLOR);
+
+ //Out with the old in with the new!
+ uLCD.filled_rectangle(cursor_x_pos * SCALAR, cursor_y_pos * SCALAR,
+ (cursor_x_pos + 1) * SCALAR - 1, (cursor_y_pos + 1) * SCALAR - 1, CURSOR_COLOR);
+
+ // store new position
+ old_cursor_x_pos = cursor_x_pos;
+ old_cursor_y_pos = cursor_y_pos;
+ }
+
+ x_mutex.unlock();
+ y_mutex.unlock();
+ }
+
+
+ //This will be where the gyro values are used to accelerate/decelerate the ball
+ void updateVelocity()
+ {
+ x_mutex.lock();
+ y_mutex.lock();
+
+ // sample gyroscope/accelerometer through filter
+ ballxvel = toDegrees(imuFilter.getPitch()) / -10;
+ ballyvel = toDegrees(imuFilter.getRoll()) / 10;
+
+ // bound velocities to max speed for x
+ if (ballxvel > 1)
+ ballxvel = CURSOR_SPEED;
+ else if (ballxvel < -1)
+ ballxvel = -CURSOR_SPEED;
+
+ // bound velocities to max speed for y
+ if (ballyvel > 1)
+ ballyvel = CURSOR_SPEED;
+ else if (ballyvel < -1)
+ ballyvel = -CURSOR_SPEED;
+
+ // round to 2 decimal places
+ ballxvel = floorf(ballxvel * 100.0) / 100.0;
+ ballyvel = floorf(ballyvel * 100.0) / 100.0;
+
+ x_mutex.unlock();
+ y_mutex.unlock();
+ }
+
+
+ //xthread and ythread act as the physics engine, simulating velocity and wall detection
+ void xthread(const void* args)
+ {
+ while (1) {
+ x_mutex.lock();
+ y_mutex.lock();
+ if (ballxvel > 0) {
+ if (maze[cursor_x_pos + 1][cursor_y_pos] != WALL_BLOCK)
+ cursor_x_pos++;
+ } else if (ballxvel < 0) {
+ if (maze[cursor_x_pos - 1][cursor_y_pos] != WALL_BLOCK)
+ cursor_x_pos--;
+ }
+ x_mutex.unlock();
+ y_mutex.unlock();
+ Thread::wait(100 - 98 * abs(ballxvel));
+ }
+ }
+
+ void ythread(const void* args)
+ {
+ while (1) {
+ x_mutex.lock();
+ y_mutex.lock();
+ if (ballyvel > 0) {
+ if (maze[cursor_x_pos][cursor_y_pos + 1] != WALL_BLOCK)
+ cursor_y_pos++;
+ } else if (ballyvel < 0) {
+ if (maze[cursor_x_pos][cursor_y_pos - 1] != WALL_BLOCK)
+ cursor_y_pos--;
+ }
+ x_mutex.unlock();
+ y_mutex.unlock();
+ Thread::wait(100 - 98 * abs(ballyvel));
+ }
+ }
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main_legacy.cpp Fri Mar 14 17:03:16 2014 +0000
@@ -0,0 +1,316 @@
+#include "mbed.h"
+#include "uLCD_4DGL.h"
+#include "rtos.h"
+#include "Music.h"
+#include "IMU_RPY.h"
+
+DigitalOut myled(LED1);
+AnalogIn xpot(p19);
+AnalogIn ypot(p20);
+uLCD_4DGL uLCD(p9,p10,p11);
+music ms(p21);
+
+Mutex xmutex,ymutex;
+char mazearr[128][128];
+char ballx, bally;
+char ballx_old, bally_old;
+float ballxvel, ballyvel, ballvel;
+enum LEVELSELECT {LEVEL1, LEVEL2, LEVEL3};
+LEVELSELECT gamestate = LEVEL1;
+
+//Sound bytes
+char s1[] = "E4:8; E4:8; R:8; E4:8; R:8; C4:8; E4:4; G4:4; R:4; G3:4; R:4;";
+int s1_len = 61;
+char wallbeep[] = "C4:48;";
+int wallbeep_len = 6;
+char victory[] = "A4:12; R:32; A4:12; R:32; A4:12; R:32; A4:4; R:8; F4:4; R:8; G4:4; R:8; A4:4; R:16; G4:20; R:32; A4:4;";
+int victory_len = 102;
+double tempo = 180;
+
+void displayTitle();
+void displayMaze();
+void updateVelocity();
+void updateBall();
+void loadLevel();
+void displayVictory();
+
+//xthread and ythread act as the physics engine, simulating velocity and wall detection
+void xthread(void const *args)
+{
+ while(1)
+ {
+ xmutex.lock();
+ ymutex.lock();
+ if(ballxvel > 0)
+ {
+ if(mazearr[ballx+1][bally] != 1)
+ {
+ ballx++;
+ }
+ else
+ {
+ ballxvel = -ballxvel;
+
+ ms.play(wallbeep,tempo,wallbeep_len);
+ }
+ }
+ else if (ballxvel < 0)
+ {
+ if(mazearr[ballx-1][bally] != 1)
+ {
+ ballx--;
+ }
+ else
+ {
+ ms.play(wallbeep,tempo,wallbeep_len);
+ ballxvel = -ballxvel;
+ }
+ }
+ xmutex.unlock();
+ ymutex.unlock();
+ Thread::wait(100-98*abs(ballxvel));
+ }
+}
+void ythread(void const *args)
+{
+ while(1)
+ {
+ xmutex.lock();
+ ymutex.lock();
+ if(ballyvel > 0)
+ {
+ if(mazearr[ballx][bally+1] != 1)
+ {
+ bally++;
+ }
+ else
+ {
+ ballyvel = -ballyvel;
+ ms.play(wallbeep,tempo,wallbeep_len);
+ }
+ }
+ else if (ballyvel < 0)
+ {
+ if(mazearr[ballx][bally-1] != 1)
+ {
+ bally--;
+ }
+ else
+ {
+ ballyvel = -ballyvel;
+ ms.play(wallbeep,tempo,wallbeep_len);
+ }
+ }
+ xmutex.unlock();
+ ymutex.unlock();
+ Thread::wait(100-98*abs(ballyvel));
+ }
+}
+
+int main() {
+ //Overclock uLCD
+ uLCD.baudrate(3000000);
+
+ //Title Screen
+ //displayTitle();
+
+ //Display Maze
+ loadLevel();
+ displayMaze();
+
+ //Music init
+ ms.freq(240);
+ ms.play(s1,tempo,s1_len);
+ //ms.play(victory, tempo, victory_len);
+
+ //Start physics engine threads
+ Thread t1(xthread);
+ Thread t2(ythread);
+
+ //Initial velocity
+ ballxvel = 0.5;
+ ballyvel = -1;
+
+ //Execution Loop
+ while(1) {
+
+ updateVelocity();
+ updateBall();
+
+ }
+}
+
+//This will be where the gyro values are used to accelerate/decelerate the ball
+void updateVelocity()
+{
+ xmutex.lock();
+ ymutex.lock();
+ //These should be 0.0 - 1.0 values
+ //ballxvel = 0.25;
+ //ballyvel = -0.25; //Note: positive yvel will send the ball DOWN due to the uLCD coordinate system
+ xmutex.unlock();
+ ymutex.unlock();
+}
+
+//Move the ball around and draw to the screen
+void updateBall()
+{
+ xmutex.lock();
+ ymutex.lock();
+
+ uLCD.pixel(ballx_old,bally_old,BLACK); //Wipe the old ball
+ uLCD.pixel(ballx,bally,0xFFFF00); //Out with the old in with the new!
+ ballx_old = ballx;
+ bally_old = bally;
+
+ xmutex.unlock();
+ ymutex.unlock();
+
+ //Draw start/end zones
+ uLCD.filled_rectangle(2,2,22,22,GREEN);
+ uLCD.filled_rectangle(106,106,126,126,0xFFFF00);
+
+ //Check victory condition
+ if(ballx > 106 && bally > 106)
+ {
+ displayVictory();
+ }
+}
+
+//Take whats in the mazearr and write it
+void displayMaze()
+{
+ //Clear previous maze
+ uLCD.filled_rectangle(0, 0, 128, 128, BLACK);
+
+ //Write in new maze
+ for(int i = 0; i < 128; i++)
+ {
+ for(int j = 0; j < 128; j++)
+ {
+ if(mazearr[i][j] == 1)
+ {
+ uLCD.pixel(i,j,RED);
+ }
+ }
+ }
+}
+
+//This function will load a different map into the mazearray depending on the level selected
+void loadLevel()
+{
+ //Load ball into starting zone
+ ballx = 12;
+ bally = 12;
+
+ //Zero out the previous maze
+ for(int i = 0; i < 128; i++)
+ {
+ for(int j = 0; j < 128; j++)
+ {
+ mazearr[i][j] = 0;
+ }
+ }
+
+ //Load in test maze
+ switch(gamestate)
+ {
+ case LEVEL1:
+ //Load a test maze
+ for(int i = 0; i <= 127; i++)
+ {
+ mazearr[i][0] = 1;
+ mazearr[i][127] = 1;
+ mazearr[0][i] = 1;
+ mazearr[127][i] = 1;
+ }
+ for(int i = 0; i <= 100; i++)
+ {
+ mazearr[i][50] = 1;
+ }
+ for(int i = 0; i <= 75; i++) {
+ mazearr[i][95] = 1;
+ }
+ for(int i = 50; i <= 75; i++) {
+ mazearr[50][i] = 1;
+ }
+ break;
+
+ case LEVEL2:
+ //Load a test maze
+ for(int i = 0; i <= 127; i++)
+ {
+ mazearr[i][0] = 1;
+ mazearr[i][127] = 1;
+ mazearr[0][i] = 1;
+ mazearr[127][i] = 1;
+ }
+ for(int i = 0; i <= 100; i++)
+ {
+ mazearr[i][24] = 1;
+ }
+ for(int i = 100; i <= 125; i++) {
+ mazearr[i][95] = 1;
+ }
+ for(int i = 100; i <= 125; i++) {
+ mazearr[95][i] = 1;
+ }
+ for(int i = 40; i <= 65; i++) {
+ mazearr[i][i] = 1;
+ }
+ for(int i = 80; i <= 95; i++) {
+ mazearr[i][i] = 1;
+ }
+ break;
+
+ }
+}
+
+//Victory screen - 5 sec delay and then next level
+void displayVictory()
+{
+ //Lock out physics engine (hacky way to stop ball movement)
+ xmutex.lock();
+ ymutex.lock();
+
+ ms.play(victory, tempo, victory_len);
+
+ //Move ball to start zone
+ ballx = 12;
+ bally = 12;
+
+ while(1)
+ {
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.locate(1,3);
+ uLCD.printf("VICTORY!");
+ wait(5);
+ if (gamestate == LEVEL1)
+ {
+ gamestate = LEVEL2;
+ loadLevel();
+ displayMaze();
+ wait(1);
+ break;
+ }
+ }
+ xmutex.unlock();
+ ymutex.unlock();
+}
+
+//Game title screen
+void displayTitle()
+{
+ while(1)
+ {
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.locate(0,0);
+ uLCD.printf("SuperMbed");
+ uLCD.text_width(2);
+ uLCD.text_height(3);
+ uLCD.locate(2,1);
+ uLCD.printf("Ball!");
+ }
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Fri Mar 14 17:03:16 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-rtos/#f88660a9bed1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Mar 14 17:03:16 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/8e73be2a2ac1 \ No newline at end of file