8bit_adc_polled.c

来自「范例程序 SONiX」· C语言 代码 · 共 27 行

#include <sn8p2758.h>
#include "adc_8bit.h"
unsigned int adc_buf;

void main (void)
{
	FADENB=1;							// Enable ADC circuit
	delay(200);							// Delay 100us
	P4UR=0xfe;							// Disable P4.0 pull-up resistor
	P4M=0x00;							// Set P40 as input pin
	P4CON=0x01;							// Set P40 as pure analog input
	ADR=0x40;							// To set 8-bit and  Fcpu/1.		
	ADM=0x90;							// Enable ADC and set AIN0 input

	FADS=1;								// To start conversion
	while(FEOC==0)						// Check EOC flag
	NOP(1);
	adc_buf=ADB;							// To get ADC transform data
}

void delay (unsigned int i)
{
	unsigned int  j;
	for (j=i;j>0;j--)
	NOP(1);
}