adcmain.lst

This example program shows how to configure and use the A/D Converter of the following microcontrol

C51 COMPILER V6.14g  ADCMAIN                                                               07/15/2001 18:08:54 PAGE 1   


C51 COMPILER V6.14g, COMPILATION OF MODULE ADCMAIN
OBJECT MODULE PLACED IN adcMain.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE adcMain.c DEBUG OBJECTEXTEND

stmt level    source

   1          /*--------------------------------------------------------------------------
   2          adcMain.c
   3          
   4          Contains a sample program that implements the AD converter for the 
   5          Amtel Wirless T87C5111 and T87C5112.
   6          
   7          Copyright (c) 1988-2001 Keil Elektronik GmbH and Keil Software, Inc.
   8          All rights reserved.
   9          --------------------------------------------------------------------------*/
  10          
  11          #include <stdio.h>
  12          
  13          sfr  ADCLK   =   0xF2;	
  14          sfr  ADCON   =   0xF3;			 
  15          sfr  ADDL    =   0xF4;			 
  16          sfr  ADDH    =   0xF5;			 
  17          sfr  ADCF    =   0xF6;
  18          
  19          sfr  IE1     =   0xB1;
  20          sbit  EA     =   0xA8^7;
  21          
  22          sfr  SCON    =   0x98;
  23          sbit  TI     =   SCON^1;
  24          
  25          sfr  TMOD    =   0x89;
  26          sfr  TH1     =   0x8D;
  27          
  28          sbit  TR1    =   0x88^6;
  29          
  30          /******************************************************************************
  31          This function is called when the AD conversion is finished by the CPU.  This 
  32          is only used when in Accurate or Precision mode.
  33          ******************************************************************************/
  34          void ADC_INT( void ) interrupt 9
  35          {
  36   1      	ADCON &= ~0x10;
  37   1      }
  38          
  39          
  40          /******************************************************************************
  41          This function Initializes all values required to run the AD converter.
  42          ******************************************************************************/
  43          
  44          void Init_ADC( void )
  45          {
  46   1      	ADCF |= 0xFF;		//Sets all channels for available input
  47   1      	ADCLK |= 0x7F;		//Sets clock to second slowest value
  48   1      	ADCON |= 0x20;		//Enables the ADC
  49   1      	//ADCON |= 0x80;      //Sets QUIETM bit for Accurate conversion (10bit)
  50   1      	//ADCON |=0x40;		  //Sets PSIDLE bit for Precision conversion (9bit)
  51   1      
  52   1      	IE1 |= 0x20;		//Enable ADC Interrupt	
  53   1      	EA  = 1;			//Enable Global Interrupts
  54   1      }
  55          
C51 COMPILER V6.14g  ADCMAIN                                                               07/15/2001 18:08:54 PAGE 2   

  56          
  57          /******************************************************************************
  58          This function reads a channel and starts the AD conversion
  59          ******************************************************************************/
  60          unsigned Read_ADC( unsigned char channel )
  61          {
  62   1      	ADCON &= ~0x07;                 //Clear channel bits
  63   1      	ADCON |= 0x07 & channel;		//Sets channel to be read in ADCON
  64   1      
  65   1      	ADCON |= 0x8;					//Start Conversion
  66   1      	while( ADCON & 0x8 );
  67   1      	return( ((unsigned) ADDH << 2) | (ADDL & 3) );
  68   1      }
  69          /******************************************************************************
  70          Main Function.  Read each channel and outputs the converted value
  71          ******************************************************************************/
  72          
  73          void main( void )
  74          {
  75   1      	unsigned char i;
  76   1      
  77   1      
  78   1      /*------------------------------------------------
  79   1      Setup the serial port for 1200 baud at 16MHz.
  80   1      ------------------------------------------------*/
  81   1          SCON  = 0x50;		        /* SCON: mode 1, 8-bit UART, enable rcvr      */
  82   1          TMOD |= 0x20;               /* TMOD: timer 1, mode 2, 8-bit reload        */
  83   1          TH1   = 221;                /* TH1:  reload value for 1200 baud @ 16MHz   */
  84   1          TR1   = 1;                  /* TR1:  timer 1 run                          */
  85   1          TI    = 1;                  /* TI:   set TI to send first char of UART    */
  86   1      
  87   1      	Init_ADC();
  88   1      
  89   1         	while(1)
  90   1         	{
  91   2      		for( i = 0; i <8; i++ )
  92   2      		{
  93   3      			printf("Channel %u = %4u\n", (unsigned)i,Read_ADC( i ));
  94   3      		}
  95   2      	}
  96   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    108    ----
   CONSTANT SIZE    =     18    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)