Diff: main.cpp

Revision:

0:dd150b03a225

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Feb 17 20:55:46 2011 +0000
@@ -0,0 +1,176 @@
+#include "mbed.h"
+
+#define TRACK_INC  0.02
+
+DigitalIn buttonPin(p8);
+DigitalIn rightPin(p15);
+DigitalIn leftPin(p16);
+DigitalIn downPin(p17);
+DigitalIn upPin(p18);
+
+PwmOut blueLED(p23);
+PwmOut redLED(p24);
+PwmOut greenLED(p25);
+PwmOut whiteLED(p26);
+
+Timer outputTimer;
+Serial PC(USBTX, USBRX);
+
+
+int buttonPushCounter = 0;   // counter for the number of button presses
+
+char buttonState = 0;         // current state of the button
+char lastButtonState = 0;     // previous state of the button
+
+char upState = 0;
+char downState = 0;
+char leftState = 0;
+char rightState = 0;
+char lastUpState = 0;
+char lastDownState = 0;
+char lastLeftState = 0;
+char lastRightState = 0;
+
+float xPosition = 0.0;
+float yPosition = 0.0;
+
+
+
+void setup() 
+{
+    PC.baud(230400);
+
+    buttonPin.mode(PullUp);
+
+    redLED = 0.0;
+    greenLED = 0.0;
+    blueLED = 0.0;
+    whiteLED = 0.0;
+
+    outputTimer.start();
+}
+
+
+int main() 
+{
+    setup();
+
+    while (1) 
+    {
+
+        buttonState = buttonPin.read();
+
+        // compare the buttonState to its previous state
+        if (buttonState != lastButtonState) 
+        {
+            // if the state has changed, increment the counter
+            if (buttonState == 1) 
+            {
+                // if the current state is 1 then the button
+                // went from off to on:
+                buttonPushCounter++;
+                printf("Number of button pushes:  %i\n", buttonPushCounter);
+            }
+        }
+        lastButtonState = buttonState;
+
+
+        if (buttonPushCounter % 2 == 0) 
+        {
+            redLED = 1;
+        }
+        else 
+        {
+            redLED = 0;
+        }
+
+        upState = upPin.read();
+
+        if (upState != lastUpState) 
+        {
+            if (upState == 1) 
+            {
+                // if the current state is 1 then the button
+                // went from off to on:
+                yPosition+=TRACK_INC;
+                if (yPosition > 1.0) 
+                {
+                    yPosition = 1.0;
+                }
+            }
+        }
+        lastUpState = upState;
+
+
+        downState = downPin.read();
+
+        // compare the buttonState to its previous state
+        if (downState != lastDownState)
+        {
+            // if the state has changed, increment the counter
+            if (downState == 1) 
+            {
+                // if the current state is 1 then the button
+                // went from off to on:
+                yPosition-=TRACK_INC;
+                if (yPosition < 0.0) 
+                {
+                    yPosition = 0.0;
+                }
+            }
+        }
+        lastDownState = downState;
+
+
+        leftState = leftPin.read();
+
+        // compare the buttonState to its previous state
+        if (leftState != lastLeftState) 
+        {
+            // if the state has changed, increment the counter
+            if (leftState == 1) 
+            {
+                // if the current state is 1 then the button
+                // went from off to on:
+                xPosition-=TRACK_INC;
+                if (xPosition < 0.0) 
+                {
+                    xPosition = 0.0;
+                }
+            }
+        }
+        lastLeftState = leftState;
+
+        rightState = rightPin.read();
+
+        // compare the buttonState to its previous state
+        if (rightState != lastRightState) 
+        {
+            // if the state has changed, increment the counter
+            if (rightState == 1) 
+            {
+                // if the current state is 1 then the button
+                // went from off to on:
+                xPosition+=TRACK_INC;
+                if (xPosition > 1.0) 
+                {
+                    xPosition = 1.0;
+                }
+            }
+        }
+        lastRightState = rightState;
+
+        blueLED = xPosition;
+        greenLED = yPosition;
+
+
+
+        if (outputTimer.read_ms() > 1000) 
+        {
+            printf("Position:  (x%f, y%f)\n", xPosition, yPosition);
+
+            outputTimer.reset();
+
+        }
+    }
+}
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