adc.c

来自「is about the 51 and the LCD」· C语言 代码 · 共 29 行

#ifndef __ADC_C__
#define __ADC_C__

//#include <iom16v.h>

void adc_init(void);
uint adc_read(uchar channel);
//---------------------------------------------------------------------------
void adc_init(void)
{
	ADCSR = 0x00; //disable adc
	ADMUX = 0xc0; //select adc input 0
	ACSR  = 0x80;
	ADCSR = 0x87;
}
//--------------------------------------------------------------------------
uint adc_read(uchar channel)
{
	uint temp;
	channel |=0xc0;
	ADMUX   = channel;                        // Select channel
	ADCSR |= 0x40;                          // Start conversion
	while (!(ADCSR & 0x10));                // Check if converstion is ready
	ADCSR |= 0x10;
	temp  = ADCL;
	temp += (int)ADCH << 8;
	return(temp);
}
#endif