Diff: main.cpp

Revision:

0:9f96889b0328

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Oct 07 23:32:46 2014 +0000
@@ -0,0 +1,82 @@
+//    touch2RGB
+//program for FRDM-KL25Z
+//each touch on the touch sensor switches embedded led between Red Green and Blue colours
+
+#include "mbed.h"
+#include "TSISensor.h"
+
+const float TOUCH_THRESHOLD=0.5;   //sensor returns analog value from 0.0(no touch) to 1.0(full touch) to determine when there is a touch
+enum  colour { RED=0,GREEN,BLUE};
+
+bool analog2dig(float );
+void setColour(colour);
+
+DigitalOut r (LED_RED);
+DigitalOut g (LED_GREEN);
+DigitalOut b (LED_BLUE);
+colour currentColour=RED;
+
+Serial pc(USBTX,USBRX); //serial connection with pc
+TSISensor tsi; //touchSensor
+
+
+
+int main() {
+     bool previousState=analog2dig(tsi.readPercentage());
+     bool currentState;
+     
+     setColour(currentColour); //set initial colour
+     pc.printf("begin - initial state=%d\n",previousState);
+     
+     while(1){
+        currentState=analog2dig(tsi.readPercentage());
+        //pc.printf("state=%d\n",currentState);  
+        if(previousState==false && currentState==true){  //touch detected
+            switch (currentColour){
+                case RED:
+                    setColour(GREEN);
+                    break;
+                case GREEN:
+                    setColour(BLUE);
+                    break;
+                case BLUE:
+                    setColour(RED);
+                    break;
+                };//end switch
+        }//end if
+        previousState=currentState;
+        wait(0.1);
+ }
+}
+
+//---------------------------------------------
+void setColour(colour col){
+    switch(col){
+        case RED:
+            r=0;  // 0 enables the led
+            g=1;  // 1 disables the led
+            b=1;
+            currentColour=RED;        
+            break;
+        case GREEN:
+            r=1;
+            g=0;
+            b=1;
+            currentColour=GREEN;
+            break;
+        case BLUE:
+            r=1;
+            g=1;
+            b=0;
+            currentColour=BLUE;
+            break;
+    }
+    return;
+} 
+
+
+//-----------------------------------------------
+bool analog2dig(float analogRead){
+    return (analogRead>=TOUCH_THRESHOLD)?true:false;
+
+    }
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