touch_screen.c

S3c2410下ADC[LTC1867]的驱动程序,在LCD上可以直接显示读取的AD数据

/**************************************************************
Touch Screen control
**************************************************************/
#include <string.h>
#include "2410addr.h"
#include "2410lib.h"
#include "Touch_Screen.h"
#include "function.h"
#include "def.h"

#define ADCPRS 39

#define ITERATION 5	
unsigned int buf[ITERATION][2];
unsigned int bufx,bufy;
uchar runone;

/**************************************************************
The interrupt function for Touch Screen
**************************************************************/
void __irq Touch_Screen(void)
{
    int i;
    
    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
       
       bufx=(0x3ff&rADCDAT0);
       bufy = (0x3ff&rADCDAT1);
       // buf[i][0] = (0x3ff&rADCDAT0);
       // buf[i][1] = (0x3ff&rADCDAT1);
    }

    for(i=0;i<ITERATION;i++)    
        Uart_Printf("X %4d, Y %4d\n", bufx, bufy);
         
    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

    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;
    rINTMSK    &= ~(BIT_ADC);
    rINTSUBMSK &= ~(BIT_SUB_TC);
    Uart_Printf( "\nNow touchpanel controler is initial!\n" ) ;
    Uart_Printf( "Please Press it with touch pen!\n" ) ;
}
//*************************************************************
void Touch_Screen_Off(void)
{
	rINTMSK    |= (BIT_ADC);
    rINTSUBMSK |= (BIT_SUB_TC);    
}
 void touch_screen_driver()   
 {
   if((bufx>670)&&(bufx<740)&&(bufy>600)&&(bufy<700)&&(!runone))   //人头
     {
       bufx=0;
       runone=1;
       Lcd_ClearScr(0x00);
       Paint_Bmp( 170,127,150,113, zhy1)  ;
     }      
   if((bufx>80)&&(bufx<330)&&(bufy>80)&&(bufy<300))      //右下角
     {
       bufx=0;
       Lcd_ClearScr(0x00);
       Paint_Bmp( 0,127,150,113, zhy1)  ;
     }
    if((bufx>680)&&(bufx<930)&&(bufy>120)&&(bufy<320))   //左下角
      {
        bufx=0;
        Lcd_ClearScr(0x00);
         Paint_Bmp(170,127,150,113,zhy2) ;
     }
}