📄 ad_max197.h
字号:
//#include<absacc.h>
#include<math.h>
#include"lcd_12864.h"
//说明：如不做成函数形式，只获取AD值，不做处理，速度可达到100K。
#define AD_SAMPLE_HIGH XBYTE[0xfa00]
#define AD_SAMPLE_LOW XBYTE[0xf200]
#define VREF 4096
//uchar AD_Convert=0;
sbit AD_Convert=P1^7;
//void Dispnumber(uint number,uchar j,uchar x,uchar y);
//void Disponechar(unsigned char x,unsigned char y, char character);
//void Dispnumber_long(ulong number,uchar j,uchar x,uchar y);
/****************************************
函数名称：void AD_MAX197(uchar channel,uchar sample_range)
函数功能：采集数据并将转换值的绝对值返回，数据的正负用FLAG标识。
函数说明：此函数为双极性采样，即可采集正负电压，工作方式只可选择 1:-5~5V, 3:-10~10V。
创建日期：07.08.03晚21：00
****************************************/
uint AD_MAX197(uchar channel,uchar sample_range)
//channel为通道选择控制字，sample_range为采样范围控制字(0:0~5V, 1:-5~+5V, 2:0~10V, 3:-10~+10V)
{ bit flag;
uchar CMD;
uchar high_4,low_8;
uint convert_number;
CMD=(sample_range*8+channel)|0X40;
XBYTE[0xfa00]=CMD; //置控制字
while(AD_Convert==0);
AD_Convert=0;
high_4=AD_SAMPLE_HIGH; //接收高四位, P2_3=1; P22,P21,P20控制片选选通
low_8=AD_SAMPLE_LOW; //接收低八位, P2_3=0; P22,P21,P20控制片选选通
if(high_4>0x0f) { high_4=0x0f-(high_4&0x0f); low_8=0x0100-low_8; flag=1;} //处理采集负电压时得到的补码
else flag=0;
convert_number=high_4*256+low_8;
switch(sample_range)
{
case 1:convert_number=convert_number*2;break;
case 2:convert_number=convert_number*2;break;
case 3:convert_number=convert_number*4;break;
default: break;
}
return convert_number;
}
/****************************************
函数名称：void AD_MAX197_Bipolar(uchar channel,uchar sample_range)
函数功能：计算采样的均值，有效值，峰峰值。
函数说明：此函数为双极性采样，即可采集正负电压，工作方式只可选择 1:-5~5V, 3:-10~10V
创建日期：07。08。05日17：00
****************************************/
void AD_MAX197_Bipolar(uchar channel,uchar sample_range)
{
uchar AD_CMD, AD_Vph_high=0, AD_Vph_low=0, AD_Vpl_high=0, AD_Vpl_low=0;
uchar high_4,low_8;
ulong AD_High_rms=0, AD_Low_rms=0, sum_rms;
long AD_High_ave=0, AD_Low_ave=0, sum_ave;
//每一次进入函数计算注意要将上次计算值清零
uint vpp,count=0, ave, rms;
AD_CMD=(sample_range*8+channel)|0X40;
while(1)
{
XBYTE[0xfa00]=AD_CMD; //置控制字
while(AD_Convert==1);
// AD_Convert=0;
high_4=AD_SAMPLE_HIGH; //接收高四位, P2_3=1; P22,P21,P20控制片选选通
low_8=AD_SAMPLE_LOW; //接收低八位, P2_3=0; P22,P21,P20控制片选选通
if( (high_4&0xf0)==0xf0 )
{
high_4=0x0f-(high_4&0x0f);
low_8=0xff-low_8; //处理采集负电压时得到的补码
AD_High_ave=AD_High_ave - high_4;
AD_Low_ave =AD_Low_ave - low_8;
if( (high_4 > AD_Vpl_high) || ( (high_4==AD_Vpl_high)&&(low_8 > AD_Vpl_low) ) )
{
AD_Vpl_high = high_4;
AD_Vpl_low = low_8;
} //峰峰值更新
}
else
{
AD_High_ave=AD_High_ave + high_4;
AD_Low_ave =AD_Low_ave + low_8;
if( (high_4 > AD_Vph_high) || ( (high_4==AD_Vph_high)&&(low_8 > AD_Vph_low) ) )
{
AD_Vph_high = high_4;
AD_Vph_low = low_8;
}
}
AD_High_rms = AD_High_rms + high_4*high_4;
AD_Low_rms = AD_Low_rms + low_8*low_8 + (long)512*high_4*low_8; //有效值计算
//此处512不变成（LONG）型会对均值的计算产生影响？？？？？？
count++;
if(count==2000) break; //采样值不宜超过三千，以防止计算有效值时数据溢出。
}
vpp=AD_Vph_high * 256 + AD_Vph_low + AD_Vpl_high * 256 + AD_Vpl_low;
//峰峰值处理
AD_High_rms=AD_High_rms/count;
AD_Low_rms =AD_Low_rms /count;
sum_rms=(ulong)(AD_High_rms*65536+AD_Low_rms);
rms=sqrt(sum_rms); //有效值处理
sum_ave=AD_High_ave*256+AD_Low_ave;
if(sum_ave<0){ sum_ave=(-1)*sum_ave; Disponechar(1,2,'-');}
else Disponechar(1,2,'+');
ave=sum_ave/count; //均值处理
if( (AD_CMD&0x18)==0x08 ) { ave=ave*2; rms=rms*2; vpp=vpp*2; } //如果选择-5~~+5v量程，应在计算上乘以2
if( (AD_CMD&0x18)==0x18 ) { ave=ave*4; rms=rms*4; vpp=vpp*4; } //如果选择-10~~+10v量程，应在计算上乘以4
vpp=(uint)(vpp*1.2207);
ave=(uint)(ave*1.2207);
rms=(uint)(rms*1.2207);
LcdPrintf(2,1,"vpp:");
LcdPrintf(2,2,"ave:");
LcdPrintf(2,3,"rms:");
Dispnumber_float(vpp,4,3,10,1);
Dispnumber_float(ave,4,3,10,2);
Dispnumber_float(rms,4,3,10,3); //显示
}
/****************************************
函数名称：void AD_MAX197_Polar(uchar channel,uchar sample_range)
函数功能：计算采样的均值，有效值，峰峰值。
函数说明：此函数为单极性采样，即只采集正电压时的算法，工作方式只可选择 0:0~5V, 2:0~10V
创建日期：07。08。04日21：00
****************************************/
/*
void AD_MAX197_Polar(uchar channel,uchar sample_range)
{
uchar AD_CMD, AD_Vph_high=0, AD_Vph_low=0, AD_Vpl_high=255, AD_Vpl_low=255;
uchar high_4,low_8;
ulong AD_High_ave=0, AD_Low_ave=0, AD_High_rms=0, AD_Low_rms=0, sum_ave, sum_rms;
//每一次进入函数计算注意要将上次计算值清零
uint vpp,count=0, ave, rms;
AD_CMD=(sample_range*8+channel)|0X40;
while(1)
{
XBYTE[0xfa00]=AD_CMD; //置控制字
while(AD_Convert==0);
AD_Convert=0;
high_4=XBYTE[0xfa00]; //接收高四位, P2_3=1; P22,P21,P20控制片选选通
low_8=XBYTE[0xf200]; //接收低八位, P2_3=0; P22,P21,P20控制片选选通
AD_High_ave = AD_High_ave + high_4;
AD_Low_ave = AD_Low_ave + low_8; //均值累加计算
if( (high_4 > AD_Vph_high) || ( (high_4==AD_Vph_high)&&(low_8 > AD_Vph_low) ) )
{
AD_Vph_high = high_4;
AD_Vph_low = low_8;
}
if( (high_4 < AD_Vpl_high) || ( (high_4==AD_Vpl_high)&&(low_8 < AD_Vpl_low) ) )
{
AD_Vpl_high = high_4;
AD_Vpl_low = low_8;
} //峰峰值更新
AD_High_rms = AD_High_rms + high_4*high_4;
AD_Low_rms = AD_Low_rms + low_8*low_8 + 512*high_4*low_8; //有效值计算
count++;
if(count==2000) break; //采样值不宜超过两千，以防止计算有效值时数据溢出。
}
vpp=AD_Vph_high * 256 + AD_Vph_low - AD_Vpl_high * 256 - AD_Vpl_low;
//峰峰值处理
AD_High_rms=AD_High_rms/count;
AD_Low_rms =AD_Low_rms /count;
sum_rms=(ulong)(AD_High_rms*65536+AD_Low_rms);
rms=sqrt(sum_rms); //有效值处理
sum_ave=(ulong)(AD_High_ave*256+AD_Low_ave);
ave=sum_ave/count; //均值处理
if(AD_CMD&0x18) { ave=ave*2; rms=rms*2; vpp=vpp*2; } //如果选择10V量程，应在计算上乘以2
vpp=(uint)(vpp*1.2207);
ave=(uint)(ave*1.2207);
rms=(uint)(rms*1.2207);
LcdPrintf(2,1,"vpp:");
LcdPrintf(2,2,"ave:");
LcdPrintf(2,3,"rms:");
Dispnumber_float(vpp,4,3,10,1);
Dispnumber_float(ave,4,3,10,2);
Dispnumber_float(rms,4,3,10,3); //显示
}
*/
/*
//本函数只计算均值
AD_MAX197_Bipolar(uchar channel,uchar sample_range) //将补码变换后再处理
{
char sign;
uchar AD_CMD;
uchar high_4,low_8;
long AD_High=0,AD_Low=0,sum; //每一次进入函数计算注意要将上次计算值清零
int count=0;
uint ave;
AD_CMD=(sample_range*8+channel)|0X40;
while(1)
{
XBYTE[0xfa00]=AD_CMD; //置控制字
while(AD_Convert==0);
AD_Convert=0;
high_4=XBYTE[0xfa00]; //接收高四位, P2_3=1; P22,P21,P20控制片选选通
low_8=XBYTE[0xf200]; //接收低八位, P2_3=0; P22,P21,P20控制片选选通
if( (high_4&0xf0)==0xf0 )
{
high_4=0x0f-(high_4&0x0f);
low_8=0x0100-low_8;
AD_High=AD_High - high_4;
AD_Low =AD_Low - low_8;
} //处理采集负电压时得到的补码
else
{
AD_High=AD_High + high_4;
AD_Low=AD_Low + low_8;
}
count++;
if(count==1000) break;
}
// Dispnumber_long((-1)*AD_High,6,10,3);
// Dispnumber_long((-1)*AD_Low,6,10,3);
sum=AD_High*256+AD_Low;
if(sum<0) { sum=(-1)*sum; sign=1; }
else sign=0;
ave=sum/count;
if(AD_CMD&0x18) { ave=ave*2; //rms=rms*2; vpp=vpp*2;
} //如果选择10V量程，应在计算上乘以2
// vpp=(uint)(vpp*1.2207);
ave=(uint)(ave*1.2207);
// rms=(uint)(rms*1.2207);
Dispnumber_float(ave,4,3,10,2);
if(sign==1)Disponechar(5,1,'-');
if(sign==0)Disponechar(5,1,'+');
}
*/
/*
AD_MAX197_Bipolar(uchar channel,uchar sample_range) //直接用补码处理
{
uchar CMD;
uchar high_4,low_8;
long AD_High=0,AD_Low=0,sum; //每一次进入函数计算注意要将上次计算值清零
int count=0,ave;
CMD=(sample_range*8+channel)|0X40;
while(1)
{
XBYTE[0xfa00]=CMD; //置控制字
while(AD_Convert==0);
AD_Convert=0;
high_4=XBYTE[0xfa00]; //接收高四位, P2_3=1; P22,P21,P20控制片选选通
if(high_4&0xf0==0xf0) (long)high_4=high_4+0xffff00;
AD_High=AD_High+high_4;
low_8=XBYTE[0xf200]; //接收低八位, P2_3=0; P22,P21,P20控制片选选通
AD_Low=AD_Low+low_8;
count++;
if(count==1000) break;
}
sum=(long)(AD_High*256+AD_Low);
if(sum<0) sum=(-1)*sum;
ave=sum/count;
Dispnumber(ave,4,10,1);
}
*/
/*
AD_MAX197_Process(uchar channel,uchar sample_range)
{
uchar CMD;
uchar high_4,low_8;
ulong AD_High,AD_Low,sum,high_temp;
uint count=0,ave;
CMD=(sample_range*8+channel)|0X40;
XBYTE[0xfa00]=CMD; //置控制字
while(1)
{
while(AD_Convert==0);
AD_Convert=0;
high_4=XBYTE[0xfa00]; //接收高四位, P2_3=1; P22,P21,P20控制片选选通
if(high_4>0x0f) high_temp=high_4+0xffff00;
AD_High=AD_High+high_temp;
low_8=XBYTE[0xf200]; //接收低八位, P2_3=0; P22,P21,P20控制片选选通
AD_Low=AD_Low+low_8;
count++;
if(count==1000) break;
}
sum=(ulong)(AD_High*256+AD_Low);
sum=0x100000000-sum;
ave=sum/count;
Dispnumber(ave,4,10,1);
}
*/
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -