Touch.h

00001 
00002 #ifndef MBED_Touch_H
00003 #define MBED_Touch_H
00004 
00005 #include "SPI_TFT.h"
00006 #include "mbed.h"
00007 
00008     typedef struct
00009     {
00010        int x;
00011        int y;
00012     } Coordinate;
00013 
00014     typedef struct
00015     {
00016     int         An,
00017                 Bn,
00018                 Cn,
00019                 Dn,
00020                 En,
00021                 Fn,
00022                 Divider ;
00023     } Matrix;
00024 
00025 class TouchScreenADS7843 : public  SPI_TFT
00026 {
00027 public:
00028 // (To be modified) C code below works on KEIL compiler but NOT on LPCXpresso/mbed 
00029 //    extern Coordinate ScreenSample[3];
00030 //    extern Coordinate DisplaySample[3];
00031 //    extern Matrix matrix ;
00032 //    extern Coordinate  display ;
00033 
00034     TouchScreenADS7843(PinName tp_mosi,PinName tp_miso,PinName tp_sclk,PinName tp_cs,PinName tp_irq,PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset,const char* name ="TFT");
00035 
00036     void TP_Init(void);
00037     void TP_GetAdXY(int *x,int *y);
00038     void TP_DrawPoint(unsigned int Xpos,unsigned int Ypos,unsigned int color);
00039 //    Coordinate Read_Ads7846(void);
00040     unsigned char Read_Ads7846(Coordinate * screenPtr);
00041     void TouchPanel_Calibrate(Matrix * matrixPtr);
00042     unsigned char getDisplayPoint(Coordinate * displayPtr,Coordinate * screenPtr,Matrix * matrixPtr );
00043 
00044     SPI        _tp_spi;
00045     DigitalOut _tp_cs;
00046     DigitalIn  _tp_irq;
00047 
00048 protected:
00049 
00050 #define SPI_RD_DELAY 1
00051 #define    CHX             0xd0    // 12 bit mode
00052 #define    CHY             0x90
00053 
00054     int Read_XY(unsigned char XY);
00055     void DrawCross(unsigned int Xpos,unsigned int Ypos);
00056     unsigned char setCalibrationMatrix( Coordinate * displayPtr,Coordinate * screenPtr,Matrix * matrixPtr);
00057 
00058 };
00059 #endif