Hugo Hu / Mbed 2 deprecated BRAVEHEART

A complex 2D-dungeon game on LPC1768 in SWJTU-Leeds Joint School XJEL2645 project. Referenced from the framework contributed by https://os.mbed.com/users/Siriagus/code/SimplePlatformGame/

Dependencies:   mbed N5110 ShiftReg PinDetect

main.cpp@17:d6a3b29cab31, 2015-05-11 (annotated)

Committer:
Siriagus
Date:
Mon May 11 03:52:18 2015 +0000
Revision:
17:d6a3b29cab31
Parent:
14:b4fed570abaf
Child:
18:709ea375b0df
Added sound effects ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Siriagus 0:1f92de30d43e 1 /**
Siriagus 10:f2488a0ecab7 2 * @file main.cpp
Siriagus 10:f2488a0ecab7 3 * @brief Simple platform game developed for ELEC2645 Embedded Systems Project at University of Leeds
Siriagus 10:f2488a0ecab7 4 * @author Andreas Garmannslund
Siriagus 17:d6a3b29cab31 5 * @date April/May 2015
Siriagus 10:f2488a0ecab7 6 */
Siriagus 0:1f92de30d43e 7
Siriagus 0:1f92de30d43e 8 #include "mbed.h"
Siriagus 0:1f92de30d43e 9 #include "N5110.h"
Siriagus 17:d6a3b29cab31 10 #include "PowerControl/PowerControl.h"
Siriagus 17:d6a3b29cab31 11 #include "PowerControl/EthernetPowerControl.h"
Siriagus 1:0cfe2255092a 12 #include "PinDetect.h"
Siriagus 4:d6661b976359 13 #include <string>
Siriagus 7:678873947b29 14 #include <sstream>
Siriagus 4:d6661b976359 15 #include <ctime>
Siriagus 1:0cfe2255092a 16
Siriagus 0:1f92de30d43e 17 #include "Joystick.h"
Siriagus 5:100d960fc6d5 18 #include "StateManager.h"
Siriagus 1:0cfe2255092a 19 #include "State.h"
Siriagus 4:d6661b976359 20 #include "InputManager.h"
Siriagus 17:d6a3b29cab31 21 #include "Sound.h"
Siriagus 0:1f92de30d43e 22
Siriagus 1:0cfe2255092a 23 // Redefine pin names for simple access.
Siriagus 1:0cfe2255092a 24 #define JOY_H p17
Siriagus 1:0cfe2255092a 25 #define JOY_V p16
Siriagus 1:0cfe2255092a 26 #define JOY_BTN p15
Siriagus 1:0cfe2255092a 27
Siriagus 1:0cfe2255092a 28 #define LED_POT p20
Siriagus 1:0cfe2255092a 29
Siriagus 2:0ae5ac8b0cac 30 #define BUTTON_A p28
Siriagus 2:0ae5ac8b0cac 31 #define BUTTON_B p27
Siriagus 1:0cfe2255092a 32 #define BUTTON_C p29
Siriagus 1:0cfe2255092a 33
Siriagus 4:d6661b976359 34 // Input and Output
Siriagus 10:f2488a0ecab7 35 N5110 *lcd; /// Display
Siriagus 17:d6a3b29cab31 36 Sound *sound; // Sound: Piezo buzzer
Siriagus 4:d6661b976359 37
Siriagus 10:f2488a0ecab7 38 InputManager *input; /// Responsible for managing user input
Siriagus 4:d6661b976359 39
Siriagus 0:1f92de30d43e 40 // Brightness potentiometer
Siriagus 1:0cfe2255092a 41 AnalogIn ledPot(LED_POT);
Siriagus 0:1f92de30d43e 42
Siriagus 10:f2488a0ecab7 43 void init(); /// Set up initial variables
Siriagus 10:f2488a0ecab7 44 void cleanUp(); /// Frees remaining allocated memory
Siriagus 1:0cfe2255092a 45
Siriagus 17:d6a3b29cab31 46 StateManager* fsm; /// Finite state machine
Siriagus 5:100d960fc6d5 47
Siriagus 14:b4fed570abaf 48 AnalogIn randomPin(p18); // Unconnected pin => noise, used for generating a random seed.
Siriagus 14:b4fed570abaf 49 AnalogIn randomPin2(p19); // Unconnected pin
Siriagus 14:b4fed570abaf 50
Siriagus 17:d6a3b29cab31 51 LocalFileSystem local("local"); /// Local file system
Siriagus 17:d6a3b29cab31 52
Siriagus 14:b4fed570abaf 53 /// Function for generating a random seed by using a unconnected analog input pin
Siriagus 17:d6a3b29cab31 54 // Problem: Not trully random as pin is fairly stable. It is unfortunately connected to the ground layer (often returning 0). Would be better to connect it to a "loose wire"/bad connection-
Siriagus 17:d6a3b29cab31 55 unsigned int getRandSeed();
Siriagus 17:d6a3b29cab31 56 void readHighscoreFile();
Siriagus 14:b4fed570abaf 57
Siriagus 1:0cfe2255092a 58 int main()
Siriagus 14:b4fed570abaf 59 {
Siriagus 14:b4fed570abaf 60 srand(getRandSeed());
Siriagus 14:b4fed570abaf 61
Siriagus 1:0cfe2255092a 62 init();
Siriagus 1:0cfe2255092a 63
Siriagus 7:678873947b29 64 Timer timer;
Siriagus 7:678873947b29 65 timer.start();
Siriagus 4:d6661b976359 66
Siriagus 0:1f92de30d43e 67 while(true)
Siriagus 7:678873947b29 68 {
Siriagus 8:9ac6a428fa26 69 // We need to call Sleep() repeatedly, because periodic interrupts in InputManager will cause it to wake up every 20 ms.
Siriagus 8:9ac6a428fa26 70 while (timer.read() < 0.08)
Siriagus 8:9ac6a428fa26 71 Sleep();
Siriagus 8:9ac6a428fa26 72
Siriagus 7:678873947b29 73 // update
Siriagus 0:1f92de30d43e 74 lcd->setBrightness(1.0 - ledPot); // Update brightness of screen
Siriagus 7:678873947b29 75 fsm->update(timer.read());
Siriagus 7:678873947b29 76 input->joystick->update();
Siriagus 4:d6661b976359 77
Siriagus 4:d6661b976359 78 // render
Siriagus 5:100d960fc6d5 79 lcd->clear();
Siriagus 7:678873947b29 80 fsm->render();
Siriagus 5:100d960fc6d5 81 lcd->refresh();
Siriagus 1:0cfe2255092a 82
Siriagus 7:678873947b29 83 fsm->processRequest(); // Change the state if requested.
Siriagus 7:678873947b29 84
Siriagus 7:678873947b29 85 timer.reset();
Siriagus 0:1f92de30d43e 86 }
Siriagus 0:1f92de30d43e 87
Siriagus 17:d6a3b29cab31 88 cleanUp(); // Not really reached as the program never terminates. Added for completeness.
Siriagus 0:1f92de30d43e 89
Siriagus 0:1f92de30d43e 90 return 0;
Siriagus 3:4e3f342a135c 91 }
Siriagus 3:4e3f342a135c 92
Siriagus 3:4e3f342a135c 93 void init()
Siriagus 3:4e3f342a135c 94 {
Siriagus 17:d6a3b29cab31 95 // Disable ethernet to save power
Siriagus 17:d6a3b29cab31 96 PHY_PowerDown();
Siriagus 17:d6a3b29cab31 97
Siriagus 3:4e3f342a135c 98 // Init LCD
Siriagus 3:4e3f342a135c 99 lcd = new N5110(p7, p8, p9, p10, p11, p13, p26);
Siriagus 3:4e3f342a135c 100 lcd->init();
Siriagus 3:4e3f342a135c 101 lcd->normalMode();
Siriagus 3:4e3f342a135c 102 lcd->setBrightness(1.0 - ledPot); // Update brightness of screen
Siriagus 3:4e3f342a135c 103
Siriagus 4:d6661b976359 104 // Input
Siriagus 8:9ac6a428fa26 105 input = new InputManager(BUTTON_A, BUTTON_B, BUTTON_C, JOY_H, JOY_V, JOY_BTN);
Siriagus 3:4e3f342a135c 106
Siriagus 17:d6a3b29cab31 107 // Sound
Siriagus 17:d6a3b29cab31 108 sound = new Sound(p21);
Siriagus 17:d6a3b29cab31 109
Siriagus 17:d6a3b29cab31 110 // Finite state machine
Siriagus 17:d6a3b29cab31 111 fsm = new StateManager(lcd, input, sound, TITLE_SCREEN);
Siriagus 17:d6a3b29cab31 112
Siriagus 17:d6a3b29cab31 113 readHighscoreFile(); // load highscores from file system
Siriagus 17:d6a3b29cab31 114
Siriagus 17:d6a3b29cab31 115 sound->playNote(SFX::RESTART);
Siriagus 17:d6a3b29cab31 116 }
Siriagus 17:d6a3b29cab31 117
Siriagus 17:d6a3b29cab31 118 void readHighscoreFile()
Siriagus 17:d6a3b29cab31 119 {
Siriagus 17:d6a3b29cab31 120 FILE *fp = fopen("/local/highscores.txt", "r"); // read from local file
Siriagus 17:d6a3b29cab31 121
Siriagus 17:d6a3b29cab31 122 if (!fp) // if file is not created yet the highscores will default values as defined in Global.cpp
Siriagus 17:d6a3b29cab31 123 return;
Siriagus 17:d6a3b29cab31 124
Siriagus 17:d6a3b29cab31 125 char initials[4];
Siriagus 17:d6a3b29cab31 126 char scoreStr[8];
Siriagus 17:d6a3b29cab31 127
Siriagus 17:d6a3b29cab31 128 for (int i = 0; i < 3; ++i)
Siriagus 17:d6a3b29cab31 129 {
Siriagus 17:d6a3b29cab31 130 fscanf(fp, "%s %s", initials, scoreStr); // read from file
Siriagus 17:d6a3b29cab31 131
Siriagus 17:d6a3b29cab31 132 int score = atoi(scoreStr); // convert to int
Siriagus 17:d6a3b29cab31 133
Siriagus 17:d6a3b29cab31 134 // update global highscore table
Siriagus 17:d6a3b29cab31 135 Global::highscores[i].initials = initials;
Siriagus 17:d6a3b29cab31 136 Global::highscores[i].score = score;
Siriagus 17:d6a3b29cab31 137 }
Siriagus 17:d6a3b29cab31 138
Siriagus 17:d6a3b29cab31 139 fclose(fp);
Siriagus 3:4e3f342a135c 140 }
Siriagus 3:4e3f342a135c 141
Siriagus 3:4e3f342a135c 142 void cleanUp()
Siriagus 3:4e3f342a135c 143 {
Siriagus 3:4e3f342a135c 144 delete lcd;
Siriagus 4:d6661b976359 145 delete input;
Siriagus 17:d6a3b29cab31 146 delete sound;
Siriagus 17:d6a3b29cab31 147 }
Siriagus 17:d6a3b29cab31 148
Siriagus 17:d6a3b29cab31 149 /// Get a random seed based on unconnected analog input pins
Siriagus 17:d6a3b29cab31 150 unsigned int getRandSeed()
Siriagus 17:d6a3b29cab31 151 {
Siriagus 17:d6a3b29cab31 152 unsigned int randNum = 0;
Siriagus 17:d6a3b29cab31 153 unsigned int lsb; // least significant bit
Siriagus 17:d6a3b29cab31 154
Siriagus 17:d6a3b29cab31 155 for (unsigned int i = 0; i < 16; ++i)
Siriagus 17:d6a3b29cab31 156 {
Siriagus 17:d6a3b29cab31 157 lsb = 1 & (randomPin.read_u16()); // Read least significant bit in randomInput - value depends on noise
Siriagus 17:d6a3b29cab31 158 randNum |= (lsb << i); // Set bit nr.i to lsb in randomInput
Siriagus 17:d6a3b29cab31 159
Siriagus 17:d6a3b29cab31 160 lsb = 1 & (randomPin2.read_u16());
Siriagus 17:d6a3b29cab31 161 randNum |= (lsb << (16+i));
Siriagus 17:d6a3b29cab31 162 }
Siriagus 17:d6a3b29cab31 163
Siriagus 17:d6a3b29cab31 164 return randNum;
Siriagus 1:0cfe2255092a 165 }