adc.c

来自「ht1621 使用例程 驱动段码液晶 同时用诺基亚3310lcd做监控」· C语言 代码 · 共 100 行

#include <avr/io.h>

void ADC_init(void)
{
ADMUX = (1<<REFS0); 
ADCSRA = (1<<ADEN)|(1<<ADPS2)|(1<<ADPS1);
}

int get_ad0(void) 
{   
    unsigned char  i;
	ADMUX = 0x67;			/*基准AVCC、左对齐、通1*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	ADMUX = 0x60;			/*基准AVCC、左对齐、通道0*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	while(!(ADCSRA & (1 << ADIF)));	/*等待*/
	i=ADCH;
	ADCSRA &= ~(1 << ADIF);		/*清标志*/
	ADCSRA &= ~(1 << ADEN);		/*关闭转换*/
	return i;
}
int get_ad1(void) 
{   
    unsigned char  i;
	ADMUX = 0x67;			/*基准AVCC、左对齐、通1*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	ADMUX = 0x61;			/*基准AVCC、左对齐、通道0*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	while(!(ADCSRA & (1 << ADIF)));	/*等待*/
	i=ADCH;
	ADCSRA &= ~(1 << ADIF);		/*清标志*/
	ADCSRA &= ~(1 << ADEN);		/*关闭转换*/
	return i;
}
int get_ad2(void) 
{   
    unsigned char  i;
	ADMUX = 0x67;			/*基准AVCC、左对齐、通1*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	ADMUX = 0x62;			/*基准AVCC、左对齐、通道0*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	while(!(ADCSRA & (1 << ADIF)));	/*等待*/
	i=ADCH;
	ADCSRA &= ~(1 << ADIF);		/*清标志*/
	ADCSRA &= ~(1 << ADEN);		/*关闭转换*/
	return i;
}
int get_ad3(void) 
{   
    unsigned char  i;
	ADMUX = 0x67;			/*基准AVCC、左对齐、通1*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	ADMUX = 0x63;			/*基准AVCC、左对齐、通道0*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	while(!(ADCSRA & (1 << ADIF)));	/*等待*/
	i=ADCH;
	ADCSRA &= ~(1 << ADIF);		/*清标志*/
	ADCSRA &= ~(1 << ADEN);		/*关闭转换*/
	return i;
}
int get_ad4(void) 
{   
    unsigned char  i;
	ADMUX = 0x67;			/*基准AVCC、左对齐、通1*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	ADMUX = 0x64;			/*基准AVCC、左对齐、通道0*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	while(!(ADCSRA & (1 << ADIF)));	/*等待*/
	i=ADCH;
	ADCSRA &= ~(1 << ADIF);		/*清标志*/
	ADCSRA &= ~(1 << ADEN);		/*关闭转换*/
	return i;
}
int get_ad5(void) 
{   
    unsigned char  i;
	ADMUX = 0x67;			/*基准AVCC、左对齐、通1*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	ADMUX = 0x65;			/*基准AVCC、左对齐、通道0*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	while(!(ADCSRA & (1 << ADIF)));	/*等待*/
	i=ADCH;
	ADCSRA &= ~(1 << ADIF);		/*清标志*/
	ADCSRA &= ~(1 << ADEN);		/*关闭转换*/
	return i;
}
int get_ad6(void) 
{   
    unsigned char  i;
	ADMUX = 0x67;			/*基准AVCC、左对齐、通1*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	ADMUX = 0x66;			/*基准AVCC、左对齐、通道0*/
	ADCSRA = 0xC6;			/*使能、开启、4分频*/
	while(!(ADCSRA & (1 << ADIF)));	/*等待*/
	i=ADCH;
	ADCSRA &= ~(1 << ADIF);		/*清标志*/
	ADCSRA &= ~(1 << ADEN);		/*关闭转换*/
	return i;
}