Aaron Goselin
Just an example program for Sparkfun's Trackballer breakout board.
Revision 0:dd150b03a225, committed 2011-02-17
- Comitter:
- Nakor
- Date:
- Thu Feb 17 20:55:46 2011 +0000
- Commit message:
- First commit.
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /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();
+
+ }
+ }
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Feb 17 20:55:46 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912