Diff: main.cpp

Revision:

0:1f53ece35c14

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Dec 07 18:09:52 2019 +0000
@@ -0,0 +1,52 @@
+#include "mbed.h"
+#include"PeripheralNames.h"
+#include"PeripheralPins.h"
+#include"PinNames.h"
+
+    Serial serial(PA_2, PA_3,9600); 
+    AnalogIn Sound(PB_0); 
+    Timer tim;
+    // Clear the screen // 
+    void clrscr()
+    {    
+    char clrscr[] = {0x1B, '[', '2' , 'J',0};    
+    serial.printf(clrscr);
+
+     }
+    // // Goto specified line and column // 
+    void gotoscr(int line, int column) 
+    {    char scr[] = {0x1B, '[', 0x00, ';' ,0x00, 'H', 0};    
+    scr[2] = line;    
+    scr[4] = column;   
+     serial.printf(scr); 
+    }
+
+    int main() {   
+    double mV;   
+    float SMax = 0,Peak,SMin = 4096;    
+    // // Read the peak-topeak output voltage of the audio amplifier, 
+    // then display the voltage on the PC screen //   
+    while(1)                                         // Do forever
+    {   
+        tim.reset();                                 // Reset Timer       
+        tim.start();                                // Start Timer       
+        SMax = 0.0;      
+        SMin = 3000.0;
+        while(tim.read_ms() < 50)                    // Do for 50ms      
+        {    
+            mV = 3000.0f * Sound.read();            // In mV            
+            if(mV > SMax)                           // Find Max               
+             SMax = mV;            
+             else if(mV < SMin)                      // Find Min               
+                SMin = mV;        
+        }              
+                 Peak = SMax - SMin;                          // Peak-to-peak      
+                 tim.stop();                                  // Stop Timer      
+                clrscr();                                    // Clear screen      
+                gotoscr('4', '0');                           // Line 4, col 0     
+                serial.printf("Sound Level = %5.2f", Peak);   // Display      
+                                                   // Wait 1 second  
+
+    } 
+    
+  }
\ No newline at end of file