pwmadc.c

来自「avr的pwm测试代码」· C语言 代码 · 共 38 行

//PWMADC.c : source file for the PWM ADC
//

#include "PWM.h"
#include "PWMADC.h"

/////////////////////////////////////////////////////////////////////////////
//PWMADC

void adc_init(void)
{
	//{{WIZARD_MAP(ADC)
	// ADC Clock: 125.000kHz
	// ADC Voltage Reference: AREF
	// ADC Noise Canceler Enabled
	ADCSRB |= 0x0;
	ADMUX = 0x0;
	ADCSRA = 0x8e;
	//}}WIZARD_MAP(ADC)
}

SIGNAL(SIG_ADC)
{
	// Read the ADC conversion result
	adc_data = ADCW;
}

unsigned int read_adc(unsigned char adc_input)
{
	// Set ADC input
	ADMUX &= 0xE0;
	ADMUX |= adc_input;
	// MCU sleep
	set_sleep_mode(SLEEP_MODE_ADC);
	sleep_mode();
	return adc_data;
}