Diff: main.cpp

Revision:

1:d8b92f4c7e03

Parent:

0:fb74ddc7b758

diff -r fb74ddc7b758 -r d8b92f4c7e03 main.cpp
--- a/main.cpp	Fri Aug 22 02:12:30 2014 +0000
+++ b/main.cpp	Fri Aug 22 17:09:48 2014 +0000
@@ -3,7 +3,14 @@
 Automatic keyboard app
 
 You are viewing the code for the future of keyboards.  You might as well
-smash your current keyboard, because once you use your KL25Z as 
+smash your current keyboard, because once you use your KL25Z as a keyboard
+you will never look back.
+
+The Keyboard uses the touch slider and splits it in to two buttons, a left and a right button.
+The left Button types Pirates! and the right button types ROBOTS!
+
+The two USB ports on the board are labeled SDA and USB.  Use the port called USB to type.
+The LED will light on when pressed as well.
 
 */
 
@@ -11,7 +18,7 @@
 #include "tsi_sensor.h"
 #include "USBKeyboard.h"
 
-/* These defines will be replaced by PinNames soon */
+/* A couple of boards have different pins connected */
 #if defined (TARGET_KL25Z) || defined (TARGET_KL46Z)
   #define ELEC0 9
   #define ELEC1 10
@@ -22,21 +29,20 @@
   #error TARGET NOT DEFINED
 #endif
 
-Serial pc(USBTX, USBRX);
+Serial pc(USBTX, USBRX);//begins a serial console named pc
 USBKeyboard keyboard;
 
-bool justpressed = false;
-float lastpressed = 0.0;
 
 int main(void) {
+    bool justpressed = false;//variable used to 
+    float lastpressed = 0.0;
     pc.baud(115200);//I apparently have to do this in the main loop
-    PwmOut led(LED2);//also called LED_GREEN
+    DigitalOut led(LED2);//also called LED_GREEN
     TSIAnalogSlider tsi(ELEC0, ELEC1, 40);
-    pc.printf("\nSerial port activated!\n\r");
     float i=0.0;
     while (true) {
-        i=1.0 - tsi.readPercentage();
-        led = i;
+        i=1.0 - tsi.readPercentage();//i=1.0000 when not pressed and will be between 0 and 1 when touched
+        led = (i == 1.0) ? 1 : 0;//turn the light on if the slider is pressed.  Outputting Zero on this pin connects the cathode to ground.  The annode is connected to 3.3V
         if (justpressed && (abs(lastpressed-i)>0.1)){
             justpressed=false;
         }
@@ -51,9 +57,6 @@
             justpressed = true;
             pc.printf(" ROBOTS!- Trigger number=%f\n\r",i);
         }
-
-        wait(0.1);//this is to not overload the PWM output (writing multiple times to the LED)
         //pc.printf("Reading:%f\tlastpressed:%f Justpressed:%d\n\r", i,lastpressed, justpressed);//debug code
-
     }
 }