WaveformDisplay.hpp

00001 //-----------------------------------------------------------
00002 //  Class for waveform display
00003 //
00004 //  2015/12/15, Copyright (c) 2015 MIKAMI, Naoki
00005 //-----------------------------------------------------------
00006 
00007 #ifndef F746_WAVEFORM_DISPLAY_HPP
00008 #define F746_WAVEFORM_DISPLAY_HPP
00009 
00010 #include "mbed.h"
00011 
00012 namespace Mikami
00013 {
00014     class WaveformDisplay
00015     {
00016     public:
00017         WaveformDisplay(LCD_DISCO_F746NG &lcd,
00018                         uint16_t x0, uint16_t y0, int nData,
00019                         uint16_t rShift,
00020                         uint32_t axisColor, uint32_t lineColor,
00021                         uint32_t backColor)
00022             : X0_(x0), Y0_(y0), N_DATA_(nData), R_SHIFT_(rShift),
00023               AXIS_COLOR_(axisColor), LINE_COLOR_(lineColor),
00024               BACK_COLOR_(backColor), lcd_(lcd) { Axis(); }
00025         
00026         void Execute(const int16_t xn[])
00027         {
00028             static const uint16_t LIMIT1 = Y0_ + LIMIT2_;
00029             static const uint16_t LIMIT2 = Y0_ - LIMIT2_;
00030             Axis();
00031             lcd_.SetTextColor(LINE_COLOR_);
00032             uint16_t x1 = X0_;
00033             uint16_t y1 = Clip(xn[0]);
00034             for (int n=1; n<N_DATA_; n++)
00035             {
00036                 uint16_t x2 = X0_ + n;
00037                 uint16_t y2 = Clip(xn[n]);
00038                 if ( ((y2 == LIMIT1) && (y1 == LIMIT1)) ||
00039                      ((y2 == LIMIT2) && (y1 == LIMIT2)) )
00040                 {   // Out of displaying boundaries
00041                     lcd_.SetTextColor(LCD_COLOR_RED);
00042                     lcd_.DrawHLine(x1, y1, 1);
00043                     lcd_.SetTextColor(LINE_COLOR_);
00044                 }
00045                 else
00046                     lcd_.DrawLine(x1, y1, x2, y2);
00047                 if ((y1 == LIMIT1) || (y1 == LIMIT2))
00048                     lcd_.DrawPixel(x1, y1, LCD_COLOR_RED);
00049                 x1 = x2;
00050                 y1 = y2;
00051             }
00052             lcd_.SetTextColor(BACK_COLOR_);
00053         }
00054         
00055     private:
00056         const uint16_t X0_;
00057         const uint16_t Y0_;
00058         const int N_DATA_;
00059         const uint16_t R_SHIFT_;
00060         const uint32_t AXIS_COLOR_;
00061         const uint32_t LINE_COLOR_;
00062         const uint32_t BACK_COLOR_;
00063         static const int LIMIT_ = 32;
00064         static const int LIMIT2_ = LIMIT_ + 1;
00065         
00066         LCD_DISCO_F746NG& lcd_;
00067         
00068         // Clipping
00069         uint16_t Clip(int16_t xn)
00070         {
00071             int16_t x = xn >> R_SHIFT_;
00072             if (x >  LIMIT_ ) x =  LIMIT2_;
00073             if (x < -LIMIT_ ) x = -LIMIT2_ ;
00074             return Y0_ - x;
00075         }
00076         
00077         void Axis()
00078         {
00079             lcd_.SetTextColor(BACK_COLOR_);
00080             lcd_.FillRect(X0_, Y0_-LIMIT2_, N_DATA_, LIMIT2_*2+1);
00081 
00082             lcd_.SetTextColor(AXIS_COLOR_);
00083             lcd_.DrawLine(X0_-5, Y0_, X0_+N_DATA_+5, Y0_);
00084         }        
00085 
00086         // disallow copy constructor and assignment operator
00087         WaveformDisplay(const WaveformDisplay& );
00088         WaveformDisplay& operator=(const WaveformDisplay& );
00089     };
00090 }
00091 #endif  // F746_WAVEFORM_DISPLAY_HPP