Diff: main.cpp

Revision:

0:4df415dde990

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Sep 29 01:12:20 2014 +0000
@@ -0,0 +1,78 @@
+#include "mbed.h"
+#include "LSM303DLHC.h"
+#include "USBMouseKeyboard.h"
+ 
+ 
+USBMouseKeyboard mouseKeyboard(ABS_MOUSE);
+LSM303DLHC compass(PTC11, PTC10);
+InterruptIn switchButton(D13);
+AnalogIn fireButton(A0);
+
+
+const float FLEX_THRESHOLD = .6;
+float lastFlexValue = 0;
+bool spaceHit = false;
+
+
+void hitSpace(void) {
+    /* Register trigger that the SPACE control button has been hit */
+    spaceHit = true;   
+}
+
+
+bool wasFlexReleased(void) {
+    /* Check to see whether the flex sensor was released according to predetermined threshold. */
+    bool released = false;
+    float flexValue = fireButton.read();
+    if ((lastFlexValue > FLEX_THRESHOLD) && (flexValue < FLEX_THRESHOLD)) {
+        released = true;
+    }
+    lastFlexValue = flexValue;
+    return released;
+}
+
+
+int main(void) {
+    
+    /* Variables for sensing orientation */
+    int16_t x_center = (X_MAX_ABS - X_MIN_ABS)/2;
+    int16_t y_center = (Y_MAX_ABS - Y_MIN_ABS)/2;
+    float xRot, yRot, nullRot;
+    int16_t xPos, yPos;
+
+    /* When the switch button is hit, register SPACE getting hit */
+    switchButton.fall(&hitSpace);
+    
+    while (1) {
+        /* This loop just checks sensors and maps them to keyboard and mouse motions that
+            will accurately enough control the game that has been opened in a browser
+            and centered in the middle of the screen. */
+        
+        /* Detect rotation from the compass. We don't care about several compass variables,
+            (the ones returned into the nullRot variable) so we just pass in an unused variable. */
+        /* The x and y that we compute don't appear to be perfectly accurate mappings to the
+            rotating compass -- the radius of the circle changes as one rotates. But the
+            heuristic effect we get below is good enough for playing Zuma. */
+        compass.read(&nullRot, &nullRot, &nullRot, &xRot, &yRot, &nullRot);
+        xPos = x_center + int16_t(xRot * 12000);
+        yPos = y_center + int16_t(yRot * 12000);
+        
+        /* Move the mouse to a rotated position on a circle centered at the middle of the screen */
+        mouseKeyboard.move(xPos, yPos);
+        
+        /* Check on flex sensor to see if ball was fired */
+        bool fired = wasFlexReleased();
+        if (fired) {
+            mouseKeyboard.click(xPos, yPos, MOUSE_LEFT);   
+        }
+        
+        /* Check to see if button for hitting SPACE was triggered */
+        if (spaceHit == true) {
+            mouseKeyboard.printf(" "); 
+            spaceHit = false;           
+        }
+        
+        /* Put a healthy amount of space between each iteration */
+        wait_ms(10);
+    }
+}
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