ts_sep.c

嵌入式实验 软件：ARM Developer Suite v1.2 Multi-ICE V2.2.5(Build1319)

#include <string.h>
#include "2410addr.h"
#include "2410lib.h"
#include "Ts_sep.h"
#include "def.h"

#define LOOP 1
#define ADCPRS 39

/*****************************************
  触摸屏SEP方式中断请求函数
  函数名: Adc_or_TsSep
  描述: 触摸屏SEP方式中断请求函数
  返回值：void
 *****************************************/


void __irq Adc_or_TsSep(void)
{
    int i;
    U32 Pt[6];

	//INTSUBMSK  INT_TC  [ 9] = 1  Mask sub interrupt
	//INTSUBMSK  INT_ADC [10] = 1  Mask sub interrupt
    rINTSUBMSK |= (BIT_SUB_ADC|BIT_SUB_TC); 

      // TC(Touch screen Control) Interrupt 
    if(rADCTSC & 0x100)
    {
        Uart_Printf("\nStylus Up!!\n");
		//ADCTSC XY_PST     [1:0] = 11 : Waiting for Interrupt Mode
		//ADCTSC AUTO_PST   [2  ] = 1  : Auto (Sequential) X/Y Position Conversion Mode
		//ADCTSC PULL_UP    [3  ] = 1  : XP pull-up disable
		//ADCTSC XP_SEN     [4  ] = 1  : nXPON output is 1 (XP is connected with AIN[7]).
		//ADCTSC XM_SEN     [5  ] = 1  : XMON output is 1 (XM = GND).
		//ADCTSC YP_SEN     [6  ] = 1  : nYPON output is 1 (YP is connected with AIN[5]).
		//ADCTSC YM_SEN     [7  ] = 1  : YMON output is 1 (YM = GND).
        rADCTSC &= 0xff;    // Set stylus down interrupt
    }
    else 
    {
        Uart_Printf("\nStylus Down!!\n");
           
          // <X-Position Read>
		//ADCTSC XY_PST     [1:0] = 11 : Waiting for Interrupt Mode
		//ADCTSC AUTO_PST   [2  ] = 0  : Normal ADC conversion
		//ADCTSC PULL_UP    [3  ] = 1  : XP pull-up disable
		//ADCTSC XP_SEN     [4  ] = 0  : nXPON output is 0 (XP = External voltage).
		//ADCTSC XM_SEN     [5  ] = 1  : XMON output is 1 (XM = GND).
		//ADCTSC YP_SEN     [6  ] = 1  : nYPON output is 1 (YP is connected with AIN[5]).
		//ADCTSC YM_SEN     [7  ] = 0  : YMON output is 0 (YM = Hi-Z).  
        rADCTSC=(0<<8)|(0<<7)|(1<<6)|(1<<5)|(0<<4)|(1<<3)|(0<<2)|(1);
         
        for(i=0;i<LOOP;i++);            //delay to set up the next channel
        for(i=0;i<5;i++)				//5 times
        {
        	rADCCON|=0x1;               // Start X-position conversion
            while(rADCCON & 0x1);       // Check if Enable_start is low
            while(!(0x8000&rADCCON));   // Check ECFLG
			Pt[i]=(0x3ff&rADCDAT0);
        }
        Pt[5]=(Pt[0]+Pt[1]+Pt[2]+Pt[3]+Pt[4])/5;//求一个平均值
        Uart_Printf("X-Posion[AIN5] is %04d\n", Pt[5]);

          // <Y-Position Read>
        //ADCTSC XY_PST     [1:0] = 10 : Y-position measurement
		//ADCTSC AUTO_PST   [2  ] = 0  : Normal ADC conversion
		//ADCTSC PULL_UP    [3  ] = 1  : XP pull-up disable
		//ADCTSC XP_SEN     [4  ] = 0  : nXPON output is 0 (XP = External voltage).
		//ADCTSC XM_SEN     [5  ] = 1  : XMON output is 1 (XM = GND).
		//ADCTSC YP_SEN     [6  ] = 1  : nYPON output is 1 (YP is connected with AIN[5]).
		//ADCTSC YM_SEN     [7  ] = 0  : YMON output is 0 (YM = Hi-Z). 
        rADCTSC=(0<<8)|(0<<7)|(1<<6)|(1<<5)|(0<<4)|(1<<3)|(0<<2)|(2);
          // Down,GND,Ext vlt,Hi-Z,AIN7,Pullup Dis,Normal,Y-position
        for(i=0;i<LOOP;i++);            //delay to set up the next channel
        for(i=0;i<5;i++)				//5 times
        {
            rADCCON|=0x1;               // Start Y-position conversion
            while(rADCCON & 0x1);       // Check if Enable_start is low
            while(!(0x8000&rADCCON));   // Check ECFLG
            Pt[i]=(0x3ff&rADCDAT1);
        }
        Pt[5]=(Pt[0]+Pt[1]+Pt[2]+Pt[3]+Pt[4])/5;//求一个平均值
        Uart_Printf("Y-Posion[AIN7] is %04d\n", Pt[5]);

		//ADCTSC XY_PST     [1:0] = 11 : Waiting for Interrupt Mode
		//ADCTSC AUTO_PST   [2  ] = 0  : Normal ADC conversion
		//ADCTSC PULL_UP    [3  ] = 0  : XP pull-up enable
		//ADCTSC XP_SEN     [4  ] = 1  : nXPON output is 1 (XP is connected with AIN[7]).
		//ADCTSC XM_SEN     [5  ] = 0  : XMON output is 0 (XM = Hi-Z).
		//ADCTSC YP_SEN     [6  ] = 1  : nYPON output is 1 (YP is connected with AIN[5]).
		//ADCTSC YM_SEN     [7  ] = 1  : YMON output is 1 (YM = GND).
        rADCTSC=(1<<8)|(1<<7)|(1<<6)|(0<<5)|(1<<4)|(0<<3)|(0<<2)|(3);
          // Up,GND,AIN,Hi-z,AIN,Pullup En,Normal,Waiting mode
    }

	//SUBSRCPND INT_TC [9] = 1 : Requested
    rSUBSRCPND |= BIT_SUB_TC;

	//INTSUBMSK  INT_TC [9] = 0 : Service available,
    rINTSUBMSK =~ (BIT_SUB_TC);         // Unmask sub interrupt (TC)     
    ClearPending(BIT_ADC);
}
            
//============================================================
/*****************************************
  触摸屏SEP方式测试函数
  函数名: Adc_or_TsSep
  描述: 触摸屏SEP方式测试函数
  返回值：void
 *****************************************/

void Ts_Sep(void)
{
    Uart_Printf("[Touch Screen Test.]\n");
    Uart_Printf("Separate X/Y position conversion mode test\n");

	//ADCDLY  DELAY  [15:0]   :   DC Start or Interval Delay
    rADCDLY = (50000); 

	//ADCCON ENABLE_START [0    ] = 0    : No operation
	//ADCCON READ_START   [1    ] = 0    : Disable start by read operation
	//ADCCON STDBM        [2    ] = 0    : Normal operation mode
    //ADCCON SEL_MUX      [5 : 3] = 111  : AIN7/5 fix
    //ADCCON PRSCVL       [13: 6] = 0x27 : A/D converter prescaler value.
    //ADCCON PRSCEN       [14   ] = 1    : A/D converter prescaler Enable
    rADCCON = (1<<14)|(ADCPRS<<6)|(0<<3)|(0<<2)|(0<<1)|(0);
    
	//ADCTSC XY_PST    [1:0] = 11 : Waiting for Interrupt Mode
	//ADCTSC AUTO_PST  [2  ] = 0  : Normal ADC conversion
	//ADCTSC PULL_UP   [3  ] = 0  : XP pull-up enable
	//ADCTSC XP_SEN    [4  ] = 1  : nXPON output is 1 (XP is connected with AIN[7]).
	//ADCTSC XM_SEN    [5  ] = 0  : XMON output is 0 (XM = Hi-Z).
	//ADCTSC YP_SEN    [6  ] = 1  : nYPON output is 1 (YP is connected with AIN[5]).
	//ADCTSC YM_SEN    [7  ] = 1  : YMON output is 1 (YM = GND).
	rADCTSC = (0<<8)|(1<<7)|(1<<6)|(0<<5)|(1<<4)|(0<<3)|(0<<2)|(3);

    pISR_ADC   = (unsigned)Adc_or_TsSep; //定义中断响应函数

	//INTMSK     INT_ADC [31]  = 0 : Service available,
    rINTMSK    =~(BIT_ADC);

	//INTSUBMSK  INT_TC  [9]   = 0 : Service available,
    rINTSUBMSK =~(BIT_SUB_TC);

    Uart_Printf("\nType any key to exit!!!\n");
    Uart_Printf("\nStylus Down, please...... \n");
    
    Uart_Getch();
	//INTSUBMSK  INT_TC  [9]   = 0 : Masked
    rINTSUBMSK |= BIT_SUB_TC;

	//INTMSK     INT_ADC [31]  = 0 : Masked
    rINTMSK    |= BIT_ADC;
    Uart_Printf("[Touch Screen Test.]\n");
}