touch_screen.c

用ADS1.2编写的

/**************************************************************
Touch Screen control
**************************************************************/
#include <string.h>
#include "2410addr.h"
#include "2410lib.h"
#include "Touch_Screen.h"
#include "LCD_TX06D18.h"
#define ADCPRS 39




#define ITERATION 5	



unsigned int buf[ITERATION][2];
extern unsigned char gImage_mini[];
extern unsigned char ji[];
//*************************************************************

/**************************************************************
The interrupt function for Touch Screen
**************************************************************/
void __irq Touch_Screen(void)
{
    int i;
    int x;
    int y;
    
                   //0x1<<10    0x1<<9
    rINTSUBMSK |= (BIT_SUB_ADC | BIT_SUB_TC);     //Mask sub interrupt (ADC and TC) 

    Uart_Printf("\nTS Down!\n");
        
      //Auto X-Position and Y-Position Read
    rADCTSC=(1<<7)|(1<<6)|(0<<5)|(1<<4)|(1<<3)|(1<<2)|(0);
          //[7] YM=GND, [6] YP is connected with AIN[5], [5] XM=Hi-Z, [4] XP is connected with AIN[7]
          //[3] XP pull-up disable, [2] Auto(sequential) X/Y position conversion mode, [1:0] No operation mode    

   // for(i=0;i<ITERATION;i++)
    {
        rADCTSC  = (1<<7)|(1<<6)|(0<<5)|(1<<4)|(1<<3)|(1<<2)|(0);            
        rADCCON |= 0x1;             //Start Auto conversion
        while(rADCCON & 0x1);       //Check if Enable_start is low
        while(!(0x8000&rADCCON));   //Check ECFLG
    
        buf[i][0] =(0x3ff&rADCDAT0);
        buf[i][1] =(0x3ff&rADCDAT1);
        x=320-buf[i][0]/7;
        y=240-buf[i][1]/6;
    }

   // for(i=0;i<ITERATION;i++)    
        Uart_Printf("X %4d, Y %4d\n",x,y);//buf[i][0], buf[i][1]);
        
       Paint_Bmp( 0,0,320,240,gImage_mini ) ; 
       accession_ico( x,y,50,50,ji );
        
      
         
    rADCTSC = (1<<7)|(1<<6)|(0<<5)|(1<<4)|(0<<3)|(0<<2)|(3);  
      //[7] YM=GND, [6] YP is connected with AIN[5], [5] XM=Hi-Z, [4] XP is connected with AIN[7]
      //[3] XP pull-up enable, [2] Normal ADC conversion, [1:0] Waiting for interrupt mode                
    rSUBSRCPND |= BIT_SUB_TC;
    rINTSUBMSK  =~(BIT_SUB_TC);   //Unmask sub interrupt (TC)     
    ClearPending(BIT_ADC);
}
            
/**************************************************************
The Initial of Touch Screen
**************************************************************/
void Touch_Screen_Init(void)
{
    rADCDLY = (30000);    // ADC Start or Interval Delay
             //  AD使能      ADCPRS=39
    rADCCON = (1<<14)|(ADCPRS<<6)|(0<<3)|(0<<2)|(0<<1)|(0); 
      // Enable Prescaler,Prescaler,AIN5/7 fix,Normal,Disable read start,No operation
    rADCTSC = (0<<8)|(1<<7)|(1<<6)|(0<<5)|(1<<4)|(0<<3)|(0<<2)|(3);//tark
      // Down,YM:GND,YP:AIN5,XM:Hi-z,XP:AIN7,XP pullup En,Normal,Waiting for interrupt mode

	//rSUBSRCPND |= BIT_SUB_TC;
    //rINTSUBMSK  =~(BIT_SUB_TC);
    
    pISR_ADC    = (unsigned)Touch_Screen;
                   //0x1<<31
    rINTMSK    &= ~(BIT_ADC);
                   //0x1<<9
    rINTSUBMSK &= ~(BIT_SUB_TC);
    Uart_Printf( "\nNow touchpanel controler is initial!\n" ) ;
    Uart_Printf( "Please Press it with touch pen and see what happend\n" ) ;
    Uart_Printf( "\nAny key to exit the touchpanel test\n" ) ;
    Uart_Getch() ;
    
   Touch_Screen_Off() ;
}
//*************************************************************
void Touch_Screen_Off(void)
{
	rINTMSK    |= (BIT_ADC);
    rINTSUBMSK |= (BIT_SUB_TC);
}