adccont.c

8051试验程序 基础教材

/* Author      : ADI - Apps            www.analog.com/MicroConverter

 Date          : October 2003

 File          : ADCcont.c

 Hardware      : ADuC842

 Description   : Performs ADC conversions in continuous mode at a
                 rate of 104KSPS (assuming an 2.097152 Mclk).
                 Outputs ADC results via UART.  Continuously
                 flashes LED.
                 All rate calculations assume an 2.097152MHz Mclk. */

#include<stdio.h>
#include<ioaduc842.h>

#define adcled P3_bit.P33
#define LED P3_bit.P34		//P3.4 drives red LED on eval board

#pragma vector = ADCI_int
__interrupt void adc_int(){
	printf("%02BX%02BX\n",ADCDATAH,ADCDATAL);
	return;
			  }

void DELAY(int length);
			

void main(void)

{
int CHAN = 0;

T3CON=0x083;
T3FD= 0x02D;
SCON   = 0x052;



/* PRECONFIGURE... */

ADCCON1 = 0x0AC;      // power up ADC /8 + 4 acq clock
ADCCON2 = CHAN ;      // select channel to convert

/*LAUNCH CONTINUOUS CONVERSIONS...*/

IE_bit.EA = 1;               // enable interrupts
IE_bit.EADC = 1;             // enable ADC interrupt
ADCCON2_bit.CCONV = 1;            // begin continuous conversions

/* CONTINUE WITH OTHER CODE... */
	
for (;;)
	{
	DELAY(20);
	LED ^= 1;             // blink (complement) the LED
        }

// the micro is free to continue with other tasks (flashing the LED in
// this case) while the ADC is continuously converting, and results
// are being handled by the ADC interrupt service routine.

}

void DELAY(int length)
{
while (length >=0)
    length--;
}