adcuart.c

8051试验程序 基础教材

//********************************************************************
//
// Author        : ADI - Apps            www.analog.com/MicroConverter
//
// Date          : 16 October 2003
//
// File          : 847uart.c
//
// Hardware      : ADuC845, ADuC847, ADuC848 (taking into account fact that the ADuC848 is a 16-bit ADC)
//
// Description   : sample program that performs ADC conversions in
//                 continuous mode and sends results to a PC via the
//                 UART. Operates on the RTD (PT100) on the eval board
//             via Ain1->Ain2 ADC inputs. The switches (S4) on the
//             eval board must be set as follows to get this program
//             working correctly...RTD AIN1, RTD AIN2, RTD REFIN+
//             and RTD REFIN- must be set to ON. All other switches
//             must be off.
//********************************************************************

#include <stdio.h>
#include <ioADUC847.h> //To use this with an ADuC847 or ADuC848, simply change the
             //header file to <ioADUC847.h> or <ioADUC848>


#define LED P3_bit.T0

#pragma vector=0x33
__interrupt void ADC_int ()
{
    LED ^= 1;
    printf("%X%X%X\n\r",(int)ADC0H,(int)ADC0M,(int)ADC0L);  //Remove ADC0L when using the ADuC848
    ADCSTAT_bit.RDY0 = 0;
}

void main (void)
{
   //Configure UART
   T3CON = 0x83;  //9600 Baud rate
   T3FD  = 0x12;
   SCON  = 0x52;

   SCON_bit.TI = 1;

      //CONFIGURE ADC AND START CONVERTING....
   ICON        = 0x01;  //Turn on IEXC1 source to drive RTD.
   SF          = 0x20;
   ADC0CON1    = 0x22;  //Full Buffer, Unipolar, 80mV range.
   ADC0CON2    = 0x4A;  //Refin+/-, Ain1->Ain2
   IE_bit.EADC = 1;           //Enable ADC Interrupt
   IE_bit.EA   = 1;             //Enable Global Interrupts
   ADCMODE     = 0x23;  // continuous conversion on Main channel on main channel

   //WAIT FOR INTERRUPTS....
   while(1);
}