adc842.c

ADUC842 C程序集,包括ADC,DAC,PLL,PWM,WDT等程序．

//adc842.c
/*
Author: Eckart Hartmann Date:17/10/2003
Description of Software: 
This program demonstrates the SAR ADC functions.
 ; AdcCfg() , AdcGo() ,
 ; AdcBsy() , AdcRd()
 ; AdcCal() and AdcGet() .
	Software communicates with a terminal at 9600 baud. Program shows 
	help screen with a command list. Then continuous conversions are 
	started and displayed. While measurements are output the user can 
	issue single key commands to change settings. 
	Also included are a help and wait option.
Development progress: Adc842.df
*/
//#include\"..kei842.h\" //; SFR definition file .
#include\"..lib842.h\" //; Function and variable declaration file .
#include<stdio.h>	//"stdio.h"
#include<ctype.h>	//"ctype.h"
#include<stdlib.h>	//"stdlib.h"

void PrintHelp(void);

void main(void)
	{
	char 	c1;		//Temporary variable.
	char	cXRef;		//External ref flag ('R' pressed).
	char	cGain;		//Gain calibration flag ('G' pressed).
	char	cSys;		//System calibration flag ('S' pressed).
	int	piV[14];	//Conversion results.

	cXRef = 0;

 UrtCfg(0x33,0x832d); // UrtCfg configures UART.
	printf("%04x \n",AdcRd());
	AdcCfg(0x0ac);
	AdcGet(0);

	PrintHelp();

	while(1)
		{
 		if(UrtBsy()&1)		//If key pressed.
  			{	// Act on command.
  			while((c1 = _getkey())=='w');	//Wait if 'w'.
    			if(c1=='s' || c1=='S' || c1=='g' || c1=='G')
      				{	//Calibrate.
	    			if(c1=='s')		cSys = 0;      				
       				else if(c1=='S')	cSys = 1;      				
       				else if(c1=='g')	cGain = 0;      				
       				else if(c1=='G')	cGain = 1; 
       		     		AdcCal(4*cSys+2*cGain+1);
       	      			while(AdcBsy())	printf(".");
        		      	}
        	        if(c1=='r' || c1=='R')
        			{	
 	       			if(c1=='r')	cXRef = 0;
 	       			else	cXRef = 1;
	       		        AdcCfg(0x80+0x40*cXRef);
				}
			else if(c1=='h')	PrintHelp();
      			}
       		for(c1=0; c1<11;c1++)
 			{
   			if(c1==6)	c1 = 8;
   			AdcGo(c1,1);
     			while(AdcBsy())	printf(".");
			piV[c1] = AdcRd();     
//  			piV[c1] = AdcGet(c1);
//			printf("%05d ",piV[c1]*6);
			printf("%05d ",piV[c1]);
  			}
    		printf(" %c%c%c\n",cSys?'S':'s',cGain?'G':'g',
     			cXRef?'R':'r');
 	}	}

void PrintHelp(void)
	{
	printf("To change settings during conversions press one of:\n");
	printf("\t s for internal calibration.\n");
	printf("\t S for system calibration.\n");
	printf("\t g for zero calibration.\n");
	printf("\t G for gain calibration.\n");
	printf("\t r for internal reference.\n");
	printf("\t R for external reference.\n");
	printf("\t w to wait.\n");
	printf("\t h for this help screen.\n");
	printf("\tResults line will show 12 measured values in hex format\n");
	printf("\tplus  s or S, g or G and r or R depending on selection.\n");
	printf("Press a key to end help.\n\n");
	_getkey();
	}