AD采集两路电压,并比较,控制电机转动方向,并将数据传至上位机
西安理工大学--自动化与信息工程学院
邹艺良 编写(2014.08.25)
邮箱:262276047@qq.com
//*******************************
//西安理工大学--自动化与信息工程学院--邹艺良
//*******************************
#include
#include
#include
void ADC_init();
int get_ADC_result(char ch);
unsigned int show_ADC_result_ch0();
unsigned int show_ADC_result_ch1();
void Send(unsigned char dat);
void uart_init();
void delay(unsigned int a);
void delay_10ms();
sbit P2_0=P2^0;
sbit P2_1=P2^1;
sbit P1_3=P1^3;
void positive_turn(unsigned int count); //顺时针
void negative_turn(unsigned int count); //逆时针
void stop_turn();
void main()
{
unsigned int ch0,ch1;
int value,chazhi,z1,z2,z3,z4,gap;
gap=30;
while(1)
{
uart_init();
ADC_init();
//显示左右两传感器电压
ch0=show_ADC_result_ch0();//通道ch0电压
Send(0x20); //四个空格符
Send(0x20);
Send(0x20);
Send(0x20);
ch1=show_ADC_result_ch1();//通道ch1电压
Send(0x20); //四个空格符
Send(0x20);
Send(0x20);
Send(0x20);
//显示差值电压
value=ch0-ch1;
if(ch0>ch1)
{chazhi=ch0-ch1;}
else
{chazhi=ch1-ch0;}
z1=chazhi/1000;
z2=chazhi00/100;
z3=chazhi000/10;
z4=chazhi000;
Send(0x43);//C
Send(0x3D);//=
if(ch0
{Send(0x2D);}
else
{Send(0x2B);}
Send(z1+48);
Send(0x2E);//.
Send(z2+48);
Send(z3+48);
Send(z4+48);
if((ch0+gap)
{Send(0x52);}
if(ch0>(ch1+gap))
{Send(0x4C);}
if(-gap<(ch0-ch1) || (ch0-ch1)
{Send(0x20);}
//Send(0xD); //回车
//Send(0xA); //换行
//光源跟踪
if(-gap
stop_turn();
else if(value<-gap)
negative_turn(10);
else if(value>gap)
positive_turn(10);
//for(p=0;p<50;p++) //延时1s刷新一次
//{delay_10ms();}
}
}
void ADC_init()
{
P1ASF=0x03;//设置P1.0,P1.1为AD转换口
ADC_CONTR=0x80;//打开AD电源、选择转换速度、
ADC_RES=0;
ADC_RESL=0;
AUXR1&=0xfb; //设置AD转换结果存放方式,此设为10位
delay(5);
}
int get_ADC_result(char ch)
{
unsigned int result;
ADC_CONTR=0x88|ch;//开启AD,选择通道
_nop_();
_nop_();
_nop_();
_nop_();
while(!(ADC_CONTR & 0x10));//等待转换完成,FLAG标志位置位
ADC_CONTR&=0x67; //关AD,清FLAG01100111
result=ADC_RES*4+ADC_RESL; //获取10位结果
return(result);
}
unsigned int show_ADC_result_ch0()
{
unsigned long int VCC1;
unsigned int A1,B1,C1,D1,i;
VCC1=0;
for(i=0;i<8;i++)
{
VCC1=VCC1+get_ADC_result(0);}
VCC1=VCC1/8;
VCC1=get_ADC_result(0);
VCC1=(long int)VCC1*10000/1024*5;
A1=VCC1/10000;
B1=VCC1000/1000;
C1=VCC100000/100;
D1=VCC1000000/10;
Send(0x56);//V
Send(0x31); //1
Send(0x3D);//=
Send(A1+48);
Send(0x2E);//.
Send(B1+48);
Send(C1+48);
Send(D1+48);
//Send(0xD); //回车
//Send(0xA); //换行
return(A1*1000+B1*100+C1*10+D1);
}
unsigned int show_ADC_result_ch1()
{
long int VCC2;
unsigned int A2,B2,C2,D2,i;
VCC2=0;
for(i=0;i<8;i++)
{
VCC2=VCC2+get_ADC_result(1);}
VCC2=VCC2/8;
VCC2=get_ADC_result(1);
VCC2=(long int)VCC2*10000/1024*5;
A2=VCC2/10000;
B2=VCC2000/1000;
C2=VCC200000/100;
D2=VCC2000000/10;
Send(0x56);//V
Send(0x32); //1
Send(0x3D);//=
Send(A2+48);
Send(0x2E);//.
Send(B2+48);
Send(C2+48);
Send(D2+48);
//Send(0xD); //回车
//Send(0xA); //换行
return(A2*1000+B2*100+C2*10+D2);
}
void uart_init()
{
TMOD=0x20; //TMOD=0010 0000B,定时器T1工作于方式2
SM0=0; //选择串行口工作方式1
SM1=1;
TH1=0xfa; //根据规定给定时器T1赋初值9600波特率
TL1=0xfa; //根据规定给定时器T1赋初值
TR1=1; //启动定时器T1
}
void Send(unsigned char dat)
{
SBUF=dat;
while(TI==0);
TI=0;
}
void positive_turn(unsigned int count)
{
P2_0=1;
P2_1=0;
CMOD = 0x00;//设置PCA时钟周期 系统时钟12分频 fosc/12
CL = 0x00; //初值设置
CH = 0x00;
CCAP0L = count; //设置初始占空比为25%
CCAP0H = count;//占空比 设置的是低电平的时间
CCAPM0 = 0X42;//PWM模式
CR = 1;//开启PCA计数器
}
void negative_turn(unsigned int count)
{
P2_0=0;
P2_1=1;
CMOD = 0x00;//设置PCA时钟周期 系统时钟12分频 fosc/12
CL = 0x00; //初值设置
CH = 0x00;
CCAP0L = count; //设置初始占空比为25%
CCAP0H = count;//占空比 设置的是低电平的时间
CCAPM0 = 0X42;//PWM模式
CR = 1;//开启PCA计数器
}
void