Diff: main.cpp

Revision:

1:0ff79bfe7bcf

Parent:

0:7c52d1c30eb9

diff -r 7c52d1c30eb9 -r 0ff79bfe7bcf main.cpp
--- a/main.cpp	Thu Oct 11 14:12:45 2018 +0000
+++ b/main.cpp	Thu Oct 11 14:34:30 2018 +0000
@@ -1,12 +1,53 @@
+/**************************************************************
+/ ME21001  Group m-nn
+/
+/ Lab 04   Exercise 4
+/
+/ This program reads an analogue input and displays the results
+/ to the PC
+/
+/**************************************************************/
+
 #include "mbed.h"
 
-DigitalOut myled(LED1);
+AnalogIn A_in(p17);
+PwmOut led1(LED1);
+PwmOut led2(LED2);
+PwmOut led3(LED3);
+PwmOut led4(LED4);
 
-int main() {
+int main()  {
+    
+    float analogue_val = 0.0;
+    
+    led1.period(0.020);
+    led2.period(0.020);
+    led3.period(0.020);
+    led4.period(0.020);
+    
     while(1) {
-        myled = 1;
-        wait(0.2);
-        myled = 0;
-        wait(0.2);
+        
+        analogue_val = A_in.read(); 
+        
+        if (analogue_val<0.25) {
+            led1=(analogue_val/0.25);
+            led2=led3=led4=0;
+        }
+        else if (analogue_val<0.5){
+            led1=1;
+            led2=((analogue_val-0.25)/0.25);
+            led3=led4=0;
+        }
+        else if (analogue_val<0.75){
+            led1=led2=1;
+            led3=((analogue_val-0.5)/0.25);
+            led4=0;
+        }
+        else {
+            led1=led2=led3=1;
+            led4=((analogue_val-0.75)/0.25);
+        }
+        wait (0.100);
     }
 }
+