Diff: accelestick.h

Revision:

0:22bdcdc386df

Child:

1:03d0f8a4a2d7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accelestick.h	Sat Mar 15 09:32:43 2014 +0000
@@ -0,0 +1,100 @@
+#include <stdlib.h>
+#include "mbed.h"
+
+#ifndef ACCELESTICK_H
+#define ACCELESTICK_H
+
+#include "MMA7660.h"     // Accelerometer API
+#include "C12832_lcd.h"  // LCD API
+#include "USBMouseKeyboard.h"
+ 
+#define SCALE_X 50        // g value has noise about 0.05
+#define SCALE_Y SCALE_X 
+#define SCALE_Z SCALE_X
+#define ACCEL_MIN -1.5
+#define ACCEL_MAX 1.5
+
+#define CALIB_SMPLS 16   // number of samples used for calibrating accelerometer
+
+// Joystick button values based on joyb declaration
+#define JS_NONE 0
+#define JS_DOWN 1
+#define JS_LEFT 2
+#define JS_CENTER 4
+#define JS_UP 8
+#define JS_RIGHT 16
+
+//--- Global Variables declaration ---//
+
+C12832_LCD lcd;         // for debugging
+MMA7660 mma(p28, p27);  // I2C Accelerometer
+USBMouseKeyboard mouse;
+DigitalOut led_alive(LED4);
+DigitalOut leds[] = {LED1, LED2, LED3};
+
+DigitalIn jd = p12;
+DigitalIn jl = p13;
+DigitalIn jc = p14;
+DigitalIn ju = p15;
+DigitalIn jr = p16;
+BusIn joyb(p12, p13, p14, p15, p16);
+
+typedef struct s_max_min {
+    float max_x, max_y, max_z;
+    float min_x, min_y, min_z;
+} Max_min_t;
+
+typedef struct s_int_g {
+    int16_t x, y, z;
+} G_int_t;
+
+typedef struct s_float_pos {
+    float x, y, z;
+} G_float_t;
+
+typedef struct 
+{
+    int16_t x, y, z;  // x, y, z position
+    uint8_t button;   // left button, 1 = left, 2 = center, 4 = middle
+    bool dc;          // double click
+    int8_t scroll;    // <0 to go up, >0 to go down
+} Mouse_state_t;
+
+Max_min_t peaks;
+Mouse_state_t mouse_info;
+G_int_t offset;       // calibration offset value
+
+bool calib_on = 0;
+bool debug_on = 0;
+uint8_t tm_joystick_running = 0, debug_sel;
+
+G_float_t mma_g;      // g values from accelerometer
+
+Ticker tk_led_alive;  // Ticker for flashing LED as program alive beacon
+Ticker tk_print_debug;// Ticker for printing debug information
+Timer tm_joystick_dc; // Timer for joystick double-click detection
+RawSerial debug(USBTX, USBRX);
+
+// End of Global Variable Declaration
+
+
+//--- Functions Declaration ---//
+
+  // calibrate accelerometer
+  void calib_mma(G_int_t current);
+  
+  // convert floating MMA g value into integer
+  int16_t scale_g(int8_t g);
+  G_int_t conv_g2int(G_float_t mma_g);
+  
+  // detect MMA at rest
+  void detect_mma_rest();
+
+  // Sample joystick for button press
+  void get_joystick_input();
+  
+  inline void reset_tm_joystick_dc();
+  int8_t init_accelestick();
+  int8_t run_accelestick();
+  
+#endif
\ No newline at end of file