Diff: main.cpp

Revision:

6:1096b1fd8d0a

Parent:

1:51b1b688179a

--- a/main.cpp	Thu May 09 09:26:46 2013 +0000
+++ b/main.cpp	Mon Jun 26 16:05:16 2017 +0000
@@ -1,12 +1,57 @@
 #include "mbed.h"
 #include "TSISensor.h"
 
-int main(void) {
-    PwmOut led(LED_GREEN);
-    TSISensor tsi;
-    
-    while (true) {
-        led = 1.0 - tsi.readPercentage();
-        wait(0.1);
+
+#define LED_OFF 1.0
+// Using pulse width modulation, the closer this value is to 0.0, the 
+// brighter the LED will be.
+#define LED_ON 0.9
+
+
+// Use pulse width modulation to decrease the LED's brightness.
+PwmOut greenLed(LED_GREEN);
+PwmOut redLed(LED_RED);
+PwmOut blueLed(LED_BLUE);
+
+// The blue LED is controlled by the button.
+// The green LED is controlled by the KL25Z's touch sensor.
+// The red LED is controlled by the cpuIntensive() function.
+DigitalIn button(PTA1);
+TSISensor tsi;
+
+// The serial connection is available, if necessary, for debugging purposes.
+Serial pc(USBTX,USBRX);
+
+
+// Function prototype.
+void cpuIntensive();
+
+
+int main(void)
+{
+    button.mode(PullUp);
+    redLed = greenLed = blueLed = LED_OFF;
+
+    while (1) {
+        cpuIntensive();
+
+        // Use the touch sensor to scale the green LED's brightness
+        // to be between LED_ON and LED_OFF.
+        greenLed = LED_ON + (LED_OFF - LED_ON) * (1.0 - tsi.readPercentage());
+
+        if (button)
+            blueLed = LED_OFF;
+        else
+            blueLed = LED_ON;
     }
+}
+
+
+// Using the long wait()s, simulate a CPU-intensive process.
+void cpuIntensive()
+{
+    redLed = LED_ON;
+    wait(2.0);
+    redLed = LED_OFF;
+    wait(3.0);
 }
\ No newline at end of file