tlc2543.c

TLC2543 12BIT SERIAL DRIVER CAN BE APPLIED TO ANY EMBEDDED SYSTEM.

/*-------ADCtlc2543 to ARM Gport-----*/
#ifndef CURRENT
#define CURRENT 50
#define VOLT 350
#endif 
//GPF5   4    7    8
// DIN   CS  CLK  DOUT
//  59    30   57   56
//EXTINT2  EOC   
   //      36
   
#include "..\inc\44b.h"
#include "..\inc\44blib.h"

#define AD_SIZE 12

#ifndef CHN0
#define CHN0 0x00//ADV
#define CHN1 0x10//ADI
#endif

extern float f[8];

float Filter(int a[16]);
void Ad_Init(void);
 

float Read_Ad(unsigned char chn)
{       
	int i,k;
	int temp,save_chn;
	//int temp_sum[16];	
	save_chn=chn;
	rPDATF &=0x17f;//CLK=L;   
	rPDATF &=0x17f;//CLK=L; 
	rPDATF |=0x40;//CS=H;
	rPDATF |=0x40;//CS=H;
	rPDATF &=~0x10;//CS=L;
	Delay(30);
	for(i=0;i<AD_SIZE;i++)      //输入本次通道，去掉上次结果
	{
	 	  //rPDATF =((chn&0x80)>>2)|0x1cf;//0x1cf;  //here din=0x00 for test;  
	  		if((chn&0x80)!=0) {rPDATF |= 0x020;}
	  	    else {rPDATF &= 0x1cf;}
	  	    
		  rPDATF |=0x80;  //CLK=H;
		  rPDATF |=0x80;  //CLK=H;
		  Delay(10);
		  rPDATF &=0x17f; //CLK=L;
		  rPDATF &=0x17f; //CLK=L;
		  Delay(10);
		  chn = chn<<1;
	}	 
	rPDATF |= 0x10; //CS=H 
	/////sample 16 times, by average filter	 
	Delay(30);
	//for(k=0;k<32;k++)
	{
		temp=0;
		//Delay(1000);
		rPDATF &=0x17f; //CLK=L;   
		//rPDATF &=0x17f; //CLK=L; 
		rPDATF |=0x40;  //CS=H;
		//rPDATF |=0x40;  //CS=H;
		rPDATF &=~0x10; //CS=L;
		Delay(30);
		chn = save_chn;
		for(i=0;i<AD_SIZE;i++)
		{
	  	    //rPDATF =((chn&0x80)>>2)|0x1cf;//0x1cf=0; 
	  	    if((chn&0x80)!=0) {rPDATF |= 0x020;}
	  	    else {rPDATF &= 0x1cf;}
	  	   
	  	    temp <<=1;
	  		if((rPDATF&0x100)==0x100){
	   			temp +=1;    
	    		//Uart_Printf("%d-",i);
			}			
		    //Delay(5);  
		    rPDATF|=0x80;  		//CLK=H;
		    //rPDATF|=0x80;  	//CLK=H;
		    Delay(50);
		    rPDATF&=0x17f; 		//CLK=L;
		    //rPDATF&=0x17f; 	//CLK=L;
		    //Delay(10);		  
		    chn=chn<<1;
		   
		}
		
	}							
		rPDATF |=0x10;//CS=H;
		/*if(save_chn==CHN0)
		{
			//Uart_Printf("\n  chn0=VOLT*Filter(temp_sum)/4096=  %f   \n",VOLT*Filter(temp_sum)/4096);
			// *(f+4) = Filter(temp_sum);
			Uart_Printf("    CHN0===%d- ",temp);
			//return VOLT*Filter(temp_sum)/4096;
		}
		else if(save_chn==CHN1)
		{
			//Uart_Printf("\n  chn1=  %f             \n",Filter(temp_sum));
			// *(f+3) = CURRENT*Filter(temp_sum)/4096;
			//Uart_Printf("---------------%f----------\n",*(f+3));
			Uart_Printf("    CHN1===%d- ",temp);
			//return CURRENT*Filter(temp_sum)/4096;			
		}*/
		return temp;
	
}	

void Ad_Init(void)
{
  rPCONF&=0x0000ff;    //GPF5,4,7 OUT; F8 IN
  rPCONF|=0x012500;		
  //rPCONG|=0x30;      //int_init(); PG2=extint2
  //rPCONG&=~(0x30);   //G2 input
  rPUPF&=0x0ff;        //GPF8 PULL UP
  //rPUPF =0xff;
  //rPUPG&=0xfc;       //GPG2 UP
  //Uart_Printf("[External Interrupt3 Init(enable) & Test Started!!]\n");
}

/*
float Filter(int a[16])
{
	int i,j,k,t;
	float temp_sum=0;
	i=j=k=t=0;
	for(i=0;i<16-1;i++)
		{
			k=i;
			for(j=i+1;j<16;j++)
				if(a[j]>a[k]) k=j;
			if(k!=i)
			{
				t=a[i];a[i]=a[k];a[k]=t;
			}
		}
	for(i=2;i<14;i++)
	 temp_sum += (float)a[i];
	return temp_sum/12;
} 	

float Filter(int a[16])
{
	int i,k;
	float temp_sum=0;
	i=k=0;
	for(i=0;i<16;i++)
	 temp_sum += a[i];
	//temp_sum /=16;
	for(i=0;i<16;i++)
	 if(a[i]<temp_sum*0.707||a[i]>temp_sum*1.293)
	    a[i] = 0;
	for(i=0;i<16;i++)
	 {
	 	temp_sum += a[i];
	 	if(a[i]==0) k++;
	 }
	return temp_sum/k;
} */
/*
void ADC_EINT2(void)
{
  unsigned char chn;
  //Uart_Printf(" ad begin\n");
  Read_Ad(chn);
  rI_ISPC=BIT_EINT2;	//clear EXTINT2 pending_bit
  //Uart_Printf("ad contverted\n");
}
*/