Diff: main.cpp

Revision:

0:57ece500234e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Feb 20 07:32:56 2012 +0000
@@ -0,0 +1,165 @@
+/*
+Final Year Project for Ngee Ann Polytechnic Electrical Engineering Year 3
+Project Title: Bus Assistance for the Visually Impaired
+*/
+#include "mbed.h"
+#include "scmRTOS.h"
+#include "wave_player.h"
+#include "SDHCFileSystem.h"
+#include "keypad.h"
+#include "TextLCD.h"
+
+Serial          xbee(p9, p10);
+DigitalOut      rst1(p11);
+SDFileSystem    sd(p5, p6, p7, p8, "sd");
+AnalogOut       AudioOut(p18);
+wave_player     waver(&AudioOut);
+//Keypad          keypad( p24, p23, p22, p21, p28, p27, p26, p25);
+TextLCD         lcd(p15, p16, p17, p18, p19, p20);
+DigitalOut      myled(LED1);//Create variable for Led 1 on the mbed
+DigitalOut      myled1(LED2);//Create variable for Led 2 on the mbed
+//BusOut          seven(p27, p26, p25, p24, p23, p22, p21);
+//BusOut          leds(p28, p29, p30);
+
+DigitalOut      led(LED1);
+DigitalOut      led1(LED2);
+
+//OS Timer/interrupt
+OS::TEventFlag XBee;
+
+// process types
+//typedef OS::process<OS::pr1, 5000> TProc1;  //7 Segment LED
+typedef OS::process<OS::pr0, 4000> TProc2; // XBee Communication
+//typedef OS::process<OS::pr0, 8000> TProc3;  // Playing of Audio
+//typedef OS::process<OS::pr0  1000> TProc4;  // Interrupt of Keypad
+
+// process objects
+//TProc1 Proc1;
+TProc2 Proc2;
+//TProc3 Proc3;
+//TProc4 Proc4
+
+#define  MAXBUS    10
+#define  MAXLEN     4
+#define  ENDKEY    14
+int      req;
+char     Bus[MAXBUS][MAXLEN];
+char     NumIx = 0;   // Point to current index of Bus number
+char     BusIx = 0;   // Point to current bus
+bool     BusFull = false;  // Bus number buffer is full
+char     KeyCh;
+
+
+char     Keytable[] = { '1', '2', '3', 'A',
+                        '4', '5', '6', 'B',
+                        '7', '8', '9', 'C',
+                        '*', '0', '#', 'D'
+                      };
+
+uint32_t cbAfterInput(uint32_t key) {
+    KeyCh = Keytable[key];
+
+    if (BusFull) {
+        printf("Bus number is already full\n");
+        return 2;
+    }
+
+
+    if (NumIx < MAXLEN - 1) {
+        if (key != ENDKEY) { // Terminating key
+            lcd.putc(KeyCh);
+            printf("%c", KeyCh);
+
+
+        } else { // Terminating key is entered
+            printf("\nBus(%d,%d)=%c\n", BusIx, NumIx, KeyCh);
+            BusIx++;
+            NumIx = 0;
+        }
+    }
+    return 0;
+}
+
+//---------------------------------------------------------------------------
+long long count = 0;
+
+int main() {
+    printf("\nInitialising ...\n");
+    rst1   = 0; //Set reset pin to 0
+    myled  = 0;//Set LED1 to 0
+    myled1 = 0;//Set LED2 to 0
+    wait_ms(1);//Wait at least one millisecond
+    rst1   = 1;//Set reset pin to 1
+    wait_ms(1);//Wait another millisecond
+    OS::Run();
+    memset(&Bus, 0, MAXBUS * MAXLEN);
+    //seven = Bus[BusIx][NumIx];
+
+}
+
+//---------------------------------------------------------------------------
+template<> OS_PROCESS void TProc1::Exec() {
+    int i;
+    int n = 1;
+    for (;;) {            // toggling between 7 seg led
+        for (int i=0; i<3; i++) {
+            leds = 0x01 << n;
+            n = (++n) % 3;
+            seven = Bus[BusIx][NumIx];
+
+        }
+    }
+} 
+
+//---------------------------------------------------------------------------
+template<> OS_PROCESS void TProc2::Exec() {
+
+    for (;;) {
+        if (xbee.readable()) {
+            req = xbee.getc();
+            printf("req = %c\n", req);
+            //XBee.SignalISR();
+            Sleep(2000);
+        }
+    }
+}
+
+
+//---------------------------------------------------------------------------
+template<> OS_PROCESS void TProc3::Exec() {
+
+    for (;;) {
+    
+        if (req == 'r') {
+            printf("Came here 2 \n");
+            FILE *fp = fopen("/sd/wf/Bus.wav","r");
+            waver.play(fp);
+            printf("playing");
+            fseek(fp, 0, SEEK_SET);
+            fclose(fp);
+
+    }
+}
+
+//---------------------------------------------------------------------------
+template<> OS_PROCESS void TProc4::Exec() {
+
+    keypad.CallAfterInput(&cbAfterInput);
+    keypad.Start();
+    while (1) {
+        wait_ms(100);
+    }
+}
+
+//---------------------------------------------------------------------------
+void OS::SystemTimerUserHook() {
+    ++count;
+    if (count % 2000 == 0) {
+        printf("\n%lld\n", count);
+        }
+    }
+}
+//---------------------------------------------------------------------------
+void OS::IdleProcessUserHook() {
+    __WFI();
+}
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