51单片机 C语言ADC程序怎么写

typedef unsigned char BYTE

typedef unsigned int WORD

#include "reg51.h"

#include "intrins.h"

/*Declare SFR associated with the ADC */

sfr ADC_CONTR = 0xBC

sfr ADC_RES = 0xBD

sfr ADC_LOW2= 0xBE

sfr P1ASF = 0x9D

sfr P2M0 = 0x96

sfr P2M1 = 0x95

/*Define ADC operation const for ADC_CONTR*/

#define ADC_POWER 0x80

#define ADC_FLAG0x10

#define ADC_START 0x08

#define ADC_SPEEDLL 0x00

#define ADC_SPEEDL 0x20

#define ADC_SPEEDH 0x40

#define ADC_SPEEDHH 0x60

//延时

void Delay(WORD n)

{

WORD x

while (n--)

{

x = 5000

while (x--)

}

}

//初始AD寄存器

void InitADC()

{

P1ASF = 0xff

ADC_RES = 0

ADC_CONTR = ADC_POWER | ADC_SPEEDLL

Delay(2)

}

//AD转换

BYTE GetADCResult(BYTE ch)

{

ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START

_nop_()

_nop_()

_nop_()

_nop_()

while (!(ADC_CONTR &ADC_FLAG))

ADC_CONTR &= ~ADC_FLAG

return ADC_RES

}

void main()

{ BYTE temp

P2M1=0 P2M0=0x03 //P2.0和P2.1强推挽

InitADC()

while (1)

{

temp=GetADCResult(0)//转换P1.0

if(temp>1)

P2|=0x03//P1.0有电压 P2.0和P2.1输出高

else

P2&=0xFC//P1.0无电压 P2.0和P2.1输出低

}

}

给你写一个吧，反正很简单一个程序，用mega8实现，单片机型号你可以改，只要改掉中断向量号就行：

#include <iom8v.h>

#include <macros.h>

#define LED1_ON PORTB|= BIT(1)

#define LED1_OFF PORTB&=~BIT(1)

//一下你可以再写七个灯或者更多

#define uchar unsigned char

#define uint unsigned int

uint adc_count = 0//控制AD转换速度计数

uint a_time= 0//用于AD数字滤波计数

uchar mode = 0//用于AD处理结果赋值

void port_init(void)

{

DDRB = 0xff

PORTB = 0x00

DDRC = 0x00

PORTC = 0xff

DDRD = 0xf0

PORTD = 0x00

}

// 定时器分频: 64

// 设定定时值: 1ms

// 真实定时值: 1ms (0.0%)

void timer0_init(void)

{

TCCR0 = 0x00//stop

TCNT0 = 0x83//set count

TIMSK |= 0x01

TCCR0 = 0x03//start timer

}

#pragma interrupt_handler timer0_ovf_isr:10

void timer0_ovf_isr(void)

{

TCNT0 = 0x83//reload counter value

adc_count++

if(adc_count==50) //用于控制AD转换速度

{

adc_count=0

ADCSRA = 0xCF

}

else

{

ADCSRA = 0x00

}

}

void adc_init(void)

{

ADCSRA = 0x00//禁止AD转换

ADMUX = 0x07

SFIOR |= 0x00

ACSR = 0x80//禁止模拟比较器

ADCSRA = 0xCF

//ADCSRA = 0xED

}

unsigned int adc_calc(void)

{

//计算实际电压

unsigned long value=0

unsigned int voltage=0 //电压单位为(mV)

value=ADCL //首先读低位

value|=(int)ADCH <<8 //然后读高位

voltage=(value*5000)/1023

ad_flag=1

return voltage

}

//采用AD取平均值的方式

#pragma interrupt_handler adc_isr:15

void adc_isr(void)

{

//转换完成后中断处理

unsigned int voltage1

a_time++

if(a_time<8)

{voltage1=adc_calc()voltage2=voltage2+voltage1}//数字滤波

while(a_time==8)

{

a_time=0voltage=voltage2/8voltage2=0

if((voltage)<1130){dianliang=0}

if((voltage>=1130)&&(voltage<1300)){mode=1}

if((voltage>=1300)&&(voltage<1560)){mode=2}

if((voltage>=1560)&&(voltage<1750)){mode=3}

if((voltage>=1750)&&(voltage<1950)){mode=4}

if((voltage>=1950)&&(voltage<2150)){mode=5}

if((voltage>=2150)&&(voltage<2341)){mode=6}

if((voltage>=2341)&&(voltage<2560)){mode=7}

if((voltage>=2560)&&(voltage<2710)){mode=8}

if((voltage>=2710)&&(voltage<2870)){mode=9}

}

else{mode=0}

}

void LED_DISP(void) //用于控制LED显示

{

switch(mode)

{

case 0: /*此处写上你要控制的灯的亮或灭*/ break

case 1: /*此处写上你要控制的灯的亮或灭*/ break

case 2: /*此处写上你要控制的灯的亮或灭*/ break

case 3: /*此处写上你要控制的灯的亮或灭*/ break

case 4: /*此处写上你要控制的灯的亮或灭*/ break

case 5: /*此处写上你要控制的灯的亮或灭*/ break

case 6: /*此处写上你要控制的灯的亮或灭*/ break

case 7: /*此处写上你要控制的灯的亮或灭*/ break

case 8: /*此处写上你要控制的灯的亮或灭*/ break

case 9: /*此处写上你要控制的灯的亮或灭*/ break

default: break

}

}void init_devices(void)

{

CLI()//禁止所有中断

MCUCR = 0x00

MCUCSR = 0x80//禁止JTAG

GICR = 0x00

timer0_init()

port_init()

adc_init()

//SEI()//开全局中断

}

void main(void)

{

init_devices()

while(1)

{

LED_DISP()

}

}

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