main.cpp

00001 /*
00002 Final Year Project for Ngee Ann Polytechnic Electrical Engineering Year 3
00003 Project Title: Bus Assistance for the Visually Impaired
00004 */
00005 #include "mbed.h"
00006 #include "scmRTOS.h"
00007 #include "wave_player.h"
00008 #include "SDHCFileSystem.h"
00009 #include "keypad.h"
00010 #include "TextLCD.h"
00011 
00012 Serial          xbee(p9, p10);
00013 DigitalOut      rst1(p11);
00014 SDFileSystem    sd(p5, p6, p7, p8, "sd");
00015 AnalogOut       AudioOut(p18);
00016 wave_player     waver(&AudioOut);
00017 //Keypad          keypad( p24, p23, p22, p21, p28, p27, p26, p25);
00018 TextLCD         lcd(p15, p16, p17, p18, p19, p20);
00019 DigitalOut      myled(LED1);//Create variable for Led 1 on the mbed
00020 DigitalOut      myled1(LED2);//Create variable for Led 2 on the mbed
00021 //BusOut          seven(p27, p26, p25, p24, p23, p22, p21);
00022 //BusOut          leds(p28, p29, p30);
00023 
00024 DigitalOut      led(LED1);
00025 DigitalOut      led1(LED2);
00026 
00027 //OS Timer/interrupt
00028 OS::TEventFlag XBee;
00029 
00030 // process types
00031 //typedef OS::process<OS::pr1, 5000> TProc1;  //7 Segment LED
00032 typedef OS::process<OS::pr0, 4000> TProc2; // XBee Communication
00033 //typedef OS::process<OS::pr0, 8000> TProc3;  // Playing of Audio
00034 //typedef OS::process<OS::pr0  1000> TProc4;  // Interrupt of Keypad
00035 
00036 // process objects
00037 //TProc1 Proc1;
00038 TProc2 Proc2;
00039 //TProc3 Proc3;
00040 //TProc4 Proc4
00041 
00042 #define  MAXBUS    10
00043 #define  MAXLEN     4
00044 #define  ENDKEY    14
00045 int      req;
00046 char     Bus[MAXBUS][MAXLEN];
00047 char     NumIx = 0;   // Point to current index of Bus number
00048 char     BusIx = 0;   // Point to current bus
00049 bool     BusFull = false;  // Bus number buffer is full
00050 char     KeyCh;
00051 
00052 
00053 char     Keytable[] = { '1', '2', '3', 'A',
00054                         '4', '5', '6', 'B',
00055                         '7', '8', '9', 'C',
00056                         '*', '0', '#', 'D'
00057                       };
00058 
00059 uint32_t cbAfterInput(uint32_t key) {
00060     KeyCh = Keytable[key];
00061 
00062     if (BusFull) {
00063         printf("Bus number is already full\n");
00064         return 2;
00065     }
00066 
00067 
00068     if (NumIx < MAXLEN - 1) {
00069         if (key != ENDKEY) { // Terminating key
00070             lcd.putc(KeyCh);
00071             printf("%c", KeyCh);
00072 
00073 
00074         } else { // Terminating key is entered
00075             printf("\nBus(%d,%d)=%c\n", BusIx, NumIx, KeyCh);
00076             BusIx++;
00077             NumIx = 0;
00078         }
00079     }
00080     return 0;
00081 }
00082 
00083 //---------------------------------------------------------------------------
00084 long long count = 0;
00085 
00086 int main() {
00087     printf("\nInitialising ...\n");
00088     rst1   = 0; //Set reset pin to 0
00089     myled  = 0;//Set LED1 to 0
00090     myled1 = 0;//Set LED2 to 0
00091     wait_ms(1);//Wait at least one millisecond
00092     rst1   = 1;//Set reset pin to 1
00093     wait_ms(1);//Wait another millisecond
00094     OS::Run();
00095     memset(&Bus, 0, MAXBUS * MAXLEN);
00096     //seven = Bus[BusIx][NumIx];
00097 
00098 }
00099 
00100 //---------------------------------------------------------------------------
00101 template<> OS_PROCESS void TProc1::Exec() {
00102     int i;
00103     int n = 1;
00104     for (;;) {            // toggling between 7 seg led
00105         for (int i=0; i<3; i++) {
00106             leds = 0x01 << n;
00107             n = (++n) % 3;
00108             seven = Bus[BusIx][NumIx];
00109 
00110         }
00111     }
00112 } 
00113 
00114 //---------------------------------------------------------------------------
00115 template<> OS_PROCESS void TProc2::Exec() {
00116 
00117     for (;;) {
00118         if (xbee.readable()) {
00119             req = xbee.getc();
00120             printf("req = %c\n", req);
00121             //XBee.SignalISR();
00122             Sleep(2000);
00123         }
00124     }
00125 }
00126 
00127 
00128 //---------------------------------------------------------------------------
00129 template<> OS_PROCESS void TProc3::Exec() {
00130 
00131     for (;;) {
00132     
00133         if (req == 'r') {
00134             printf("Came here 2 \n");
00135             FILE *fp = fopen("/sd/wf/Bus.wav","r");
00136             waver.play(fp);
00137             printf("playing");
00138             fseek(fp, 0, SEEK_SET);
00139             fclose(fp);
00140 
00141     }
00142 }
00143 
00144 //---------------------------------------------------------------------------
00145 template<> OS_PROCESS void TProc4::Exec() {
00146 
00147     keypad.CallAfterInput(&cbAfterInput);
00148     keypad.Start();
00149     while (1) {
00150         wait_ms(100);
00151     }
00152 }
00153 
00154 //---------------------------------------------------------------------------
00155 void OS::SystemTimerUserHook() {
00156     ++count;
00157     if (count % 2000 == 0) {
00158         printf("\n%lld\n", count);
00159         }
00160     }
00161 }
00162 //---------------------------------------------------------------------------
00163 void OS::IdleProcessUserHook() {
00164     __WFI();
00165 }