Diff: Touch.h

Revision:

0:5d8d6a976b8b

Child:

1:63a925e2a3d2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Touch.h	Sun Jan 16 14:08:38 2011 +0000
@@ -0,0 +1,218 @@
+/*
+   \file Touch.h
+   \version: 1.0
+   
+   \brief Este fichero contiene class para control de TouchScreen ADS7843 
+   
+   \web www.micros-designs.com.ar
+   \date 16/01/11
+   
+ *- Version Log --------------------------------------------------------------*
+ *   Fecha       Autor                Comentarios                             *
+ *----------------------------------------------------------------------------*
+ * 16/01/11      Suky        Original                                         *
+ *----------------------------------------------------------------------------* 
+///////////////////////////////////////////////////////////////////////////
+////                                                                   ////
+////                                                                   ////
+////        (C) Copyright 201 www.micros-designs.com.ar                ////
+//// Este código puede ser usado, modificado y distribuido libremente  ////
+//// sin eliminar esta cabecera y  sin garantía de ningún tipo.        ////
+////                                                                   ////
+////                                                                   ////
+/////////////////////////////////////////////////////////////////////////// 
+// **********************************************************************
+// ************************** EXAMPLE ***********************************
+// **********************************************************************
+#include "mbed.h"
+#include "Touch.h"
+// **********************************************************************
+#define TOUCH_X_MIN 30
+#define TOUCH_X_MAX 230
+#define TOUCH_Y_MIN 15
+#define TOUCH_Y_MAX 240
+// **********************************************************************
+DigitalOut Led1(LED1);
+DigitalOut Led2(LED2);
+// **********************************************************************
+TOUCH_DATA Coordenadas;
+volatile bool kbhit_irq=0;
+
+TouchScreenADS7843 MyTouch(p9,p10,p11,p12,p8); // ADS7843-> SDO,SDI,SCK,CS,IRQ
+// **********************************************************************
+void vISRTouchIRQ(void){
+    UINT_COORDxy Temp;
+
+    MyTouch.vTestTouchPanel(&Coordenadas);
+    // Coordenadas dentro del rango de pantalla LCD:
+    if((Coordenadas.x>TOUCH_X_MIN && Coordenadas.x<TOUCH_X_MAX) && (Coordenadas.y>TOUCH_Y_MIN && Coordenadas.y<TOUCH_Y_MAX)){
+	    // Cambio de coordenada y escala:
+	    Temp=Coordenadas.y;
+	    Coordenadas.y=((float)((255-TOUCH_X_MIN)-Coordenadas.x)*(320.0/(TOUCH_X_MAX-TOUCH_X_MIN)));
+	    Coordenadas.x=((float)(Temp-TOUCH_Y_MIN)*(240.0/(TOUCH_Y_MAX-TOUCH_Y_MIN)));
+	    kbhit_irq=1;
+    }
+}
+// **********************************************************************
+int main(){
+
+    //MyTouch.vInitADS7843(USE_12BITS,NULL);
+	MyTouch.vInitADS7843(USE_8BITS,&vISRTouchIRQ);
+
+	Led1=0;
+	Led2=0;
+
+	while(1){
+		Led2=!Led2;
+		if(kbhit_irq==1){
+			kbhit_irq=0;
+			if((Coordenadas.x<235 && Coordenadas.x>135) && (Coordenadas.y<320 && Coordenadas.y>250)){
+				Led1=!Led1;
+			}
+		}
+		wait_ms(300);
+	}
+}
+// **********************************************************************
+*/
+#include "mbed.h"
+// **********************************************************************
+#define USE_12BITS			12
+#define USE_8BITS			8
+#define ENABLE_INTERRUPT	1
+#define DISABLE_INTERRUPT	0
+// **********************************************************************
+typedef unsigned short     		UINT_COORDxy;
+typedef struct {
+    UINT_COORDxy    x;
+    UINT_COORDxy    y;
+}TOUCH_DATA;
+// **********************************************************************
+class TouchScreenADS7843 {
+public:
+    TouchScreenADS7843(PinName PIN_SDO,PinName PIN_SDI,PinName PIN_CLK,PinName PIN_CS,PinName PIN_IRQ);
+    virtual void vInitADS7843(unsigned char Bits,void (*fptr)(void));
+    virtual void vSetResolution(unsigned char Bits);
+    virtual void vTestTouchPanel(TOUCH_DATA *Data);
+    virtual void vEnableSetInterrupt(void (*fptr)(void));
+    virtual void vDisableInterrupt(void);
+    virtual bool bReadPinIRQ(void);
+protected:
+#define 	__delay_CLK_ADS7843() 	wait_us(1)
+#define 	ADS7843_READ_X_8        0x98 // IRQ Enable     
+#define 	ADS7843_READ_Y_8        0xD8
+#define 	ADS7843_READ_X_12       0x90 // IRQ Enable
+#define 	ADS7843_READ_Y_12       0xD0
+    DigitalOut 	_PIN_SDI,_PIN_CS,_PIN_CLK;
+    DigitalIn 	_PIN_SDO,_PIN_IRQ;
+    InterruptIn ADS7843_Event_Touch;
+    unsigned char Resolution;
+    virtual UINT_COORDxy ADS7843WriteAndReadData(unsigned char Data);
+};
+// **********************************************************************
+TouchScreenADS7843::TouchScreenADS7843(PinName PIN_SDO,PinName PIN_SDI,PinName PIN_CLK,PinName PIN_CS,PinName PIN_IRQ)
+        : _PIN_SDO(PIN_SDO),_PIN_SDI(PIN_SDI),_PIN_CS(PIN_CS),_PIN_CLK(PIN_CLK),_PIN_IRQ(PIN_IRQ),ADS7843_Event_Touch(PIN_IRQ) {}
+// **********************************************************************
+void TouchScreenADS7843::vInitADS7843(unsigned char Bits,void (*fptr)(void)) {
+
+    _PIN_CS=1;
+    _PIN_SDI=0;
+    _PIN_CLK=0;
+    Resolution=Bits;
+    if (fptr!=NULL) {
+        ADS7843_Event_Touch.fall(fptr);
+    }
+}
+// **********************************************************************
+void TouchScreenADS7843::vSetResolution(unsigned char Bits) {
+    Resolution=Bits;
+}
+// **********************************************************************
+void TouchScreenADS7843::vEnableSetInterrupt(void (*fptr)(void)) {
+    ADS7843_Event_Touch.fall(fptr);
+}
+// **********************************************************************
+void TouchScreenADS7843::vDisableInterrupt(void) {
+    ADS7843_Event_Touch.fall(NULL);
+}
+// **********************************************************************
+bool TouchScreenADS7843::bReadPinIRQ(void) {
+    return(_PIN_IRQ);
+}
+// **********************************************************************
+UINT_COORDxy TouchScreenADS7843::ADS7843WriteAndReadData(unsigned char Data) {
+    unsigned char k;
+    UINT_COORDxy Temp;
+
+    _PIN_CS=0;
+    __delay_CLK_ADS7843();
+    // En cada flanco ascendente se toma el dato:
+    for (k=0;k<8;k++) {
+        _PIN_SDI=!!(Data&0x80);
+        __delay_CLK_ADS7843();
+        _PIN_CLK=1;
+        __delay_CLK_ADS7843();
+        Data<<=1;
+        _PIN_CLK=0;
+
+    }
+    __delay_CLK_ADS7843(); // Esperamos busy:
+    _PIN_CLK=1;
+    __delay_CLK_ADS7843();
+    _PIN_CLK=0;
+    __delay_CLK_ADS7843();
+    __delay_CLK_ADS7843(); // Esperamos busy:
+
+    // En flanco descendente leemos data desde el ADS7843:
+    _PIN_CLK=1;
+    Temp=0;
+
+    if (Resolution==8) {
+        for (k=0;k<8;k++) {
+            Temp<<=1;
+            _PIN_CLK=0;
+            Temp+=_PIN_SDO;
+            __delay_CLK_ADS7843();
+            _PIN_CLK=1;
+        }
+    } else {
+        for (k=0;k<12;k++) {
+            Temp<<=1;
+            _PIN_CLK=0;
+            Temp+=_PIN_SDO;
+            __delay_CLK_ADS7843();
+            _PIN_CLK=1;
+        }
+    }
+    __delay_CLK_ADS7843();
+    _PIN_CLK=0;
+    _PIN_CS=1;
+
+    return(Temp);
+}
+// **********************************************************************
+void TouchScreenADS7843::vTestTouchPanel(TOUCH_DATA *Data) {
+    unsigned short TempX,TempY;
+    unsigned char k;
+
+    wait_ms(1);
+
+    TempX=0;
+    TempY=0;
+    for (k=0;k<8;k++) {
+        if (Resolution==8) {
+            TempX+=ADS7843WriteAndReadData(ADS7843_READ_X_8);
+            TempY+=ADS7843WriteAndReadData(ADS7843_READ_Y_8);
+        } else {
+            TempX+=ADS7843WriteAndReadData(ADS7843_READ_X_12);
+            TempY+=ADS7843WriteAndReadData(ADS7843_READ_Y_12);
+        }
+    }
+
+
+    Data->x=(TempX>>3);
+    Data->y=(TempY>>3);
+
+    return;
+}
+// **********************************************************************