Diff: main.cpp

Revision:

0:40ec7c453208

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Nov 13 09:03:21 2021 +0000
@@ -0,0 +1,130 @@
+/*
+Lazar Dobric 2020/0712 09:57 11/13/2021
+TEST 2
+
+
+odgovor na bonus:
+"Da li prikazana vrednost na displeju odgovara onome što se može čuti?"
+U mom slucaju, da. Ogranicio sam da cim potenciometar predje vrednost ciji je ekvivalent u procentima 90%, sama jacina zvuka bude na 90%(90% je duty cycle).
+U opstem slucaju, ne odgovara jer kada ispunjenost periode signala koji dovodimo na buzzer predje 96-97%, buzzer nece stici da se u toku periode ugasi da bi ostvario piezoelektricni efekat
+na cijem principu i radi. Zato kada bi presli tih 96-97% periode, ne bismo culi nista.
+*/
+
+
+//uvoz biblioteka
+#include "mbed.h"
+#include "math.h"
+
+
+// definisanje direktiva
+#define LOW_PWM_PERIOD_US 5000
+#define HIGH_PWM_PERIOD_US 50
+#define A PA_10
+#define B PA_9
+#define C PA_8
+#define D PB_10
+#define E PB_5
+#define F PB_4
+#define G PB_3
+#define SEL_1 PB_6
+#define SEL_2 PC_7
+#define SW1 PC_9
+
+// globalne promenljive(objekti)
+static char updateDisplay = 0;
+const int digit[] = {0b1000000, 0b1111001, 0b0100100, 0b0110000, 0b0011001, 0b0010010, 0b0000010, 0b1111000, 0b0000000, 0b0010000/*, 0b1111111*/};
+AnalogIn pot1(PA_0);
+AnalogIn pot2(PA_1);
+PwmOut buzzer(PA_11);
+InterruptIn sw1(SW1);
+BusOut display(A,B,C,D,E,F,G);
+DigitalOut select1(SEL_1);
+DigitalOut select2(SEL_2);
+
+// deklaracije funkcija
+void ISR_sw1(void);
+
+int main()
+{
+    // flegovi i inicijalizacija
+    static float volume = 0;
+    int digit1 = 0;
+    int digit2 = 0;
+    buzzer.period_us(LOW_PWM_PERIOD_US);
+    buzzer.write(0);
+    select2.write(1);
+    select1.write(1);
+    
+    // azuriranje displeja usled pritiska sw1
+    sw1.fall(&ISR_sw1);
+    
+    
+    
+    while(true)
+    {
+        volume = pot1.read();
+        printf("Volume: %f\n", volume*100);
+        if(volume > 0.9)
+        {
+            buzzer.write(0.9);
+        }
+        else if( volume < 0.05)
+        {
+            buzzer.write(0);
+        }
+        else
+        {
+        buzzer.write(volume);
+        }
+        
+        buzzer.period_us(LOW_PWM_PERIOD_US * (1 - pot2.read()));
+        
+        //wait_us(1);
+        
+
+        
+        if(updateDisplay)
+        {
+            digit2 = int(volume*100) % 10;
+            digit1 = int(volume*100) / 10;
+            updateDisplay = 0;
+        
+        }
+        else
+        {
+            updateDisplay = 0;
+        }
+        
+        if(digit1 == 0)
+        {
+            select1.write(1);
+            select2.write(0);
+            display = digit[digit2];
+            wait_ms(20);
+        }
+            
+        if(digit1 > 0)
+        {
+            select2.write(1);
+            select1.write(0);
+            display = digit[digit1];
+            printf("Digit1: %d\n", digit1);
+            //wait_us(10);
+            select1.write(1);
+            select2.write(0);
+            display = digit[digit2];
+            printf("Digit2: %d\n", digit2);
+            //wait_us(10);
+        }
+        
+
+    }   
+    
+}
+
+// Prekidna rutina
+void ISR_sw1(void)
+{
+     updateDisplay = 1;
+    
+}