Diff: main.cpp

Revision:

0:14719bc34055

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Nov 13 07:05:29 2021 +0000
@@ -0,0 +1,65 @@
+/*
+
+Lazar Dobric 11/12/2021 23:12 EST
+
+*/
+
+
+// importing libraries
+#include "mbed.h"
+
+
+// macros
+#define VOLTAGE_SCALER 3.3f
+#define VOLTAGE_LIMIT 2.7f
+#define PWM_PERIOD_MS 1
+#define BUZZER_HIGH 0.9f
+#define BUZZER_LOW 0    
+
+
+AnalogIn pot2(PA_1);
+PwmOut buzzer(PA_11);
+InterruptIn sw1(PC_9);
+
+// global
+static char buzzing = 0;
+
+// declarations
+void ISR_sw1(void);
+
+int main()
+{
+    
+    buzzer.period_ms(PWM_PERIOD_MS);
+    buzzer.write(BUZZER_LOW);
+    sw1.fall(&ISR_sw1);
+    
+    while(true)
+    {
+        if(pot2.read()*VOLTAGE_SCALER >= VOLTAGE_LIMIT)
+        {
+            if (!buzzing)
+            {
+                buzzer.write(BUZZER_HIGH);
+                buzzing = 1;
+            }
+        }
+        else
+        {
+            buzzing = 0;
+        }
+        
+        
+    }   
+    
+}
+
+// Interrupt Service Routine
+void ISR_sw1(void)
+{
+     buzzer.write(BUZZER_LOW);
+     buzzing = 0;
+    
+}
+
+