Diff: main.cpp

Revision:

1:f54097bcb8a0

Parent:

0:f3b9844205f2

--- a/main.cpp	Wed May 31 12:15:01 2017 +0000
+++ b/main.cpp	Fri Jun 02 05:19:17 2017 +0000
@@ -1,37 +1,50 @@
 #include "mbed.h"
- 
+#include "TextLCD.h"
+
+TextLCD lcd(PC_11,PC_10,PC_0,PC_3,PC_1,PC_2); // RS, E, D4-D7
 AnalogIn analog_value(PA_0);
- 
-DigitalOut led(LED1);
-Serial pc(USBTX,USBRX,115200);
 Timer t;
 
 int main() {
-    pc.format(8,SerialBase::None,1);
-    float meas;
-    led = 1;
-    pc.printf("\nAnalogIn example\n");
-    float max, min, mean;
-    max = analog_value.read()*3300;
-    min = max;
-    
+    double meas, sum, count = 0, range, highscore = 0;
+    lcd.cls();
+    lcd.printf("Welcome to Speed Testing!");
     
     while(1) {
-        meas = analog_value.read(); // Converts and read the analog input value (value from 0.0 to 1.0)
-        meas = meas * 3300; // Change the value to be in the 0 to 3300 range
-        if (meas>max)
-            max = meas;
-        if (meas<min)
-            min = meas;
-        mean = (max + min)/2;
-        pc.printf("measure = %.0f mV, mean = %.0f mV\n", meas, mean);
-        if (meas < mean) { // If the value is greater than 2V then switch the LED on
+        meas = analog_value.read() * 3300;  // Converts and read the analog input value (value from 0.0 to 1.0)
+                                            // Change the value to be in the 0 to 3300 range
+        count++;
+        sum+=meas;
+        range=sum/count;
+        
+        if(range > meas)
+            range -= 100.0;
+            
+        //pc.printf("measure = %.0f mV, mean = %.0f mV\n", meas, range);
+        if (meas < range) { // If the value is greater than 2V then switch the LED on
+          lcd.cls();
           t.start();
-          while(analog_value.read()*3300 < mean);
+          while(analog_value.read()*3300 < range);
           t.stop();
-          //if(t.read() > 0.00001)
-          pc.printf("The time taken was %f seconds\n", t.read());
-          wait(1);
+          if(t.read() > 0.0001){
+            double time = t.read();
+            double speed = 0.25 / time;
+            if(speed > highscore){
+                highscore = speed;
+                lcd.printf("!!!New record!!!");
+                lcd.locate(0,1);
+                lcd.printf("!!!!!!!!!!!!!!!!");
+                wait(3);
+            }
+            lcd.locate(0,0);
+            lcd.printf("%f s", time);
+            lcd.locate(0,1);
+            lcd.printf("%f m/s", speed);
+          }
+          else{
+            lcd.locate(0,0);
+            lcd.printf("Too fast, didn't read =.=");
+          }
         }
         t.reset();
     }