Diff: main.cpp

Revision:

3:3facd92a3f37

Parent:

2:ecbc6a14824c

--- a/main.cpp	Sat Jun 06 23:17:30 2020 +0000
+++ b/main.cpp	Sun Jun 07 23:37:02 2020 +0000
@@ -1,16 +1,29 @@
 #include "mbed.h"
 #include "TextLCD.h"
+#include "PinDetect.h"
 
 DigitalOut myled(LED1);
 
+DigitalOut buzzer(p24);
+PinDetect pb1(p23); // Increase minutes
+PinDetect pb2(p22); // Decrease minutes
+PinDetect pb3(p21); // Start / pause
+
+
 //TextLCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDType type = LCD16x2);
 // Note: VCC=5V, V0=0V, via 330 resistor)
 TextLCD lcd(p15, p16, p17, p18, p19, p20);
 
 Ticker flipper;
+Timeout wait_time;
 
+volatile int start = 0;
 volatile int t1s = 0;
 
+volatile unsigned char a = 0;
+volatile unsigned char b = 0;
+volatile unsigned char c = 0;
+
 volatile char seconds = 0;
 volatile char minutes = 25;
 volatile char hours = 0;
@@ -18,7 +31,7 @@
  
 void update_lcd() {
     lcd.locate (0,1);
-    lcd.printf("%02d:%02d:%02d",hours, minutes, seconds);
+    lcd.printf("%02d:%02d:%02d  %2x%2x%2x",hours, minutes, seconds,a,b,c);
 }
 
 void flip() {
@@ -48,23 +61,77 @@
       return;    
   }    
 }
- 
-int main () {
-    
+
+
+// Buzzer beep for t seconds
+void beep(float t) {
+    buzzer = 1;
+    wait(t);
+    buzzer = 0;
+}
+
+void beepn(int i, float t) {
+    while(i --){
+        buzzer = 1;
+        wait(t);
+        buzzer = 0;
+        wait(t);
+    }
+}
+
+// Callback routine is interrupt activated by a debounced pb2 hit
+void pb1_hit_callback (void) {
+    minutes++;
+}
+// Callback routine is interrupt activated by a debounced pb2 hit
+void pb2_hit_callback (void) {
+    minutes--;
+}
+// Callback routine is interrupt activated by a debounced pb3 hit
+void pb3_hit_callback (void) {
+    start = (start + 1) & 0x01;
+}
+
+
+int main () {   
+        
     // Clean screen
     lcd.cls();
     lcd.printf("Countdown");
 
+    beep(0.1); // init buzzer
+    
     update_lcd(); 
-          
+                  
     flipper.attach(&flip, 1.0); // interval 1 second
   
+    pb1.attach_deasserted(&pb1_hit_callback);
+    pb2.attach_deasserted(&pb2_hit_callback);
+    pb3.attach_deasserted(&pb3_hit_callback);
+    
+    pb1.setSampleFrequency();
+    pb2.setSampleFrequency();
+    pb3.setSampleFrequency();
+    
     while(1) {
         if (t1s){
           t1s = 0;
           myled = !myled;
-          count_down();
-          update_lcd(); 
-        }
+          
+          if(start)
+              count_down();
+              
+          update_lcd();
+          
+          // Last 5 seconds
+          if(seconds > 0 && seconds <= 5 && minutes == 0 && hours == 0) {
+              beep(0.2);
+          }
+          // Countdown finished
+          else if(seconds == 0 && minutes == 0 && hours == 0) {
+            flipper.detach();
+            beepn(5, 0.2);
+          }
+         }           
    }
 }
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