Diff: touchpad.h

Revision:

0:0a76ae27065b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/touchpad.h	Wed May 05 12:10:15 2010 +0000
@@ -0,0 +1,61 @@
+/*
+Touchpad driver.
+
+CPV, 3/9/2009
+*/
+
+#ifndef __TOUCHPAD_H__
+#define __TOUCHPAD_H__
+
+
+#include "mbed.h"
+#include "filters.h"
+
+
+class TouchpadChannel
+{
+public:
+  void initialise(int min, int quantise_step);
+  void tick(int v) { m_filter.tick(v); }
+  int quantise(void);
+  int operator()(void) { return m_quantised; }
+  int get_raw(void) { return m_filter(); }
+
+protected:
+  FilterBoxI m_filter;
+  int m_min;
+  int m_quantise_step;
+  int m_quantised;
+};
+
+
+class Touchpad
+{
+public:
+  Touchpad(PinName x0, PinName x1, PinName y0, PinName y1);
+  
+  void tick(void);
+  
+  int get_raw_x(void) { return m_ch_x.get_raw(); }
+  int get_raw_y(void) { return m_ch_y.get_raw(); }
+  
+  int hotspot(void) { return (m_ch_x.quantise()>=0 && m_ch_y.quantise()>=0); }
+  int get_hotspot_x(void) { return m_ch_x(); }
+  int get_hotspot_y(void) { return m_ch_y(); }
+
+protected:
+  TouchpadChannel m_ch_x;
+  TouchpadChannel m_ch_y;
+
+  PinName m_x0;
+  PinName m_x1;
+  PinName m_y0;
+  PinName m_y1;
+
+  int read(PinName drive_hi, PinName drive_lo, PinName read_hi, PinName read_lo);
+  int read_x(void) { return read(m_x1,m_x0,m_y1,m_y0); }
+  int read_y(void) { return read(m_y1,m_y0,m_x1,m_x0); }
+};
+
+
+#endif // __TOUCHPAD_H__