main.cpp

00001 #include "mbed.h"
00002 #include "TextLCD.h"
00003 #include "button_value.h"
00004 #include <map>
00005 
00006 // Define screen
00007 TextLCD lcd(PA_8, PA_9, PC_7, PB_6, PA_7, PA_6, PA_5); // RS, RW, E, D4-D7
00008  
00009 // Define Bus In for Buttons (Do, Re, Mi, Fa)
00010 BusIn Bus_In(PA_10, PB_3, PB_5, PB_4);
00011 
00012 // Define the PWM speaker
00013 PwmOut speaker(PB_10);
00014     
00015 //Define variables for sound
00016 volatile int state_buttons = 0;
00017 std::map<int, double> period;
00018 
00019 void print_note(char *str)
00020 {
00021     lcd.cls();
00022     lcd.printf(str);
00023 }
00024 
00025 void print_char()
00026 {
00027     lcd.printf("Hello world!");
00028     fflush(stdout);
00029 }
00030 
00031 Thread thread;
00032 
00033 DigitalOut led1(LED1);
00034 
00035 void print_thread()
00036 {
00037     while (true) {
00038         wait(1);
00039         print_char();
00040     }
00041 }
00042 
00043 void    refresh_state_button()
00044 {
00045    printf("refresh_state_button \n");
00046    state_buttons = Bus_In & Bus_In.mask(); // read the bus and mask out bits not being used    
00047    printf("state_button [ %d ]\n", state_buttons);
00048 }
00049 
00050 void        play_music(int key)
00051 {
00052    printf("play_music \n");
00053    printf("key [%x], value[%f]\n", key, period[key]);
00054    speaker.period(period[key]);            
00055    while (state_buttons == key) {
00056      refresh_state_button();
00057    }
00058    check_buttons();
00059 }
00060 
00061 void        check_buttons()
00062 {
00063    printf("check_buttons \n");
00064     // check bits set in bus
00065     switch(state_buttons) { 
00066         case 0x0: 
00067             printf("0b0000, All buttons pressed [%d] \n\r", Bus_In & Bus_In.mask());
00068             speaker = 0.25;
00069             print_note("DO RE MI FA");
00070             play_music(0x0);
00071             break;
00072         case 0x1: 
00073             printf("0b0001, Button 2 & 3 & 4 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00074             speaker = 0.25;
00075             print_note("RE MI FA");
00076             play_music(0x1);
00077             break;
00078         case 0x2: 
00079             printf("0b0010, Button 1 & 3 & 4 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00080             print_note("DO MI FA");
00081             speaker = 0.25;
00082             play_music(0x2);
00083             break; 
00084         case 0x3: 
00085             printf("0b0011, Button 3 & 4 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00086             print_note("MI FA");
00087             speaker = 0.25;
00088             play_music(0x3);
00089             break;
00090         case 0x4: 
00091             printf("0b0100, Button 1 & 2 & 4 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00092             print_note("DO RE FA");
00093             speaker = 0.25;
00094             play_music(0x4);
00095             break;
00096         case 0x5: 
00097             printf("0b0101, Button 2 & 4 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00098             print_note("RE FA");
00099             speaker = 0.25;
00100             play_music(0x5);
00101             break;
00102         case 0x6: 
00103             printf("0b0110, Button 1 & 4 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00104             print_note("DO FA");
00105             speaker = 0.25;
00106             play_music(0x6);
00107             break;
00108         case 0x7: 
00109             printf("0b0111, Button 4 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00110             print_note("FA");
00111             speaker = 0.5;
00112             play_music(0x7);
00113             break;
00114         case 0x8: 
00115             printf("0b1000, Button 1 & 2 & 3 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00116             print_note("DO RE MI");
00117             speaker = 0.25;
00118             play_music(0x8);
00119             break; 
00120         case 0x9: 
00121             printf("0b1001, Button 2 & 3 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00122             print_note("RE MI");
00123             speaker = 0.25;
00124             play_music(0x9);
00125             break; 
00126         case 0xA: 
00127             printf("0b1010, Button 1 & 3 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00128             print_note("DO MI");
00129             speaker = 0.25;
00130             play_music(0xA);
00131             break;
00132         case 0xB: 
00133             printf("0b1011, Button 3 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00134             print_note("MI");
00135             speaker = 0.5;
00136             play_music(0xB);
00137             break;
00138         case 0xC: 
00139             printf("0b1100, Button 1 & 2 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00140             speaker = 0.25;
00141             print_note("DO RE");
00142             play_music(0xC);
00143             break; 
00144         case 0xD: 
00145             printf("0b1101, Button 2 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00146             print_note("RE");
00147             speaker = 0.5;
00148             play_music(0xD);
00149             break; 
00150         case 0xE: 
00151             printf("0b1110, Button 1 pressed [%d] \n\r", Bus_In & Bus_In.mask());
00152             print_note("DO");
00153             speaker = 0.5;
00154             play_music(0xE);
00155             break; 
00156         case 0xF: 
00157             printf("0b1111, No button pressed [%d] \n\r", Bus_In & Bus_In.mask());
00158             speaker = 0;
00159             lcd.cls();
00160             break;
00161     }
00162 }
00163 
00164 // TODO: perios of notes with ID
00165 // TODO: implement new 4 buttons
00166 // TODO: link new 2 buttons + implementation
00167 // TODO: deal with gamme
00168 
00169 // TODO: PB with DO RE on the screen (board crashes)
00170 
00171 int main()
00172 {
00173     printf("\n\n*** CS 435 - Piano ***\n");
00174     
00175     period[0xE] = 1.0 / 262.0; // DO
00176     period[0xD] = 1.0 / 294.0; // RE
00177     period[0xB] = 1.0 / 330.0; // MI
00178     period[0x7] = 1.0 / 349.0; // FA
00179     period[0xC] = 1.0 / (262.0 + 294.0); // DO + RE
00180     period[0x8] = 1.0 / (262.0 + 294.0 + 330.0) 
00181     lcd.printf("CS 435 - Piano");
00182 
00183     //thread.start(print_thread);
00184 
00185     while (true) {
00186         printf("loop\n");
00187         led1 = !led1;
00188         refresh_state_button();
00189         check_buttons();
00190         wait(0.1);
00191     }
00192 }