单片机LRC万用表表制作程序+PCB文件 -

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
#define C1 0.045
uchar code WenDu1[]="数\xfd字万用表 ";
uchar code WenDu2[]="欢迎使用 ";
uchar code code_L[]="电感： ";
uchar code code_R[]="电阻： ";
uchar code code_C[]="电容： ";
uchar code code_e[]="错误： ";
uchar num;
sbit key1 =P1^0;
sbit key2 =P1^1;
sbit key3 =P1^2;
//unsigned long LZ=0;
//float f=0;
float LZ=0;
float RX=0;
float CX=0;
float f=0;
float temp_f[4];
unsigned int tt,th1,tl1;
unsigned int pluse=0;
bit flag=0;
unsigned char key_num=0;
#define L 1
#define R 2
#define C 3
sbit aa1 =P2^0;
sbit bb1 =P2^1;
#include<Lcd12864.h>
void cd4051(unsigned char num)
{
switch(num){
case 1: bb1=0;aa1=0;break;
case 2: bb1=0;aa1=1; break;
case 3: bb1=1;aa1=0; break;
default : aa1=1;aa1=1;break;
}
}
void scan_key()
{
if(!key1){
if(!key1){
while(!key1);
key_num=1;
cd4051(L);
// aa1=0;bb1=0;
Lcd_ShowSring(4,0,code_L);
Lcd_ShowSring(1,15,"L");
}
}
if(!key2){
if(!key2){
while(!key2);
key_num=2;
cd4051(R);
//aa1=0;bb1=1;
Lcd_ShowSring(4,0,code_R);
Lcd_ShowSring(1,15,"R");
}
}
if(!key3){
if(!key3){
while(!key3);
key_num=3;
cd4051(C);
//aa1=1;bb1=0;
Lcd_ShowSring(4,0,code_C);
Lcd_ShowSring(1,15,"C");
}
}
}
//中断初始化
void init()
{
// TMOD=0x11; //定时器0和定时器1都是方式1,16位定时器
//定时器设置
TMOD=0x51; //设置定时器0，方式1:16位定时器
TH1=0x00; //定时器1高位装初值
TL1=0x00; //定时器1低位装初值
ET1=1; //定时器1 使能位
TH0=(65535-50000)/255; //定时器1高位装初值
TL0=(65535-50000)%255;; //定时器1高位装初值
ET0=1; ////定时器0 使能位
TR0=1;
TR1=1;
EA=1;// 总中断
}
void Measurement_L();//电感测量
void Measurement_R();//电阻测量
void Measurement_C();//电容测量
unsigned char gather_num=0;
unsigned char m_second=0;
void main ()
{
LCDInit();
Lcd_ShowSring(1,0,WenDu1);
Lcd_ShowSring(2,0,WenDu2);
// Lcd_ShowSring(4,0,code_R);
init();
// cd4051(R);
// key_num=2;
while(1){
scan_key();
if(flag){
flag=0;
//在十ms里面记了这么多个脉冲
// 那么一个脉冲的周期就是 50ms/tt/1000 (s) 化简得到 f 20tt
if(gather_num<4) {
temp_f[gather_num]=pluse*65536+256*TH1+TL1; //1000000000000 12 100000000 8
gather_num++;
}
else{
gather_num=0;
f=(temp_f[0]+temp_f[1]+temp_f[2]+temp_f[3])/4.0;
// Lcd_Display(3,0,f);
switch(key_num) {
case 1:Measurement_L(); break;
case 2:Measurement_R(); break;
case 3:Measurement_C(); break;
default :break;
}
}
TH0=(65535-50000)/255; //定时器1高位装初值
TL0=(65535-50000)%255;; //定时器1高位装初值
TH1=0; //清零开始重新计数
TL1=0;
pluse=0;
TR0=1;//开定时器计时10ms;//使能位外部中断0 数10内有多少个脉冲
TR1=1;//进行新一轮的计数
m_second=0;
// num++;
// Lcd_Display(4,4,num);
}
}
}
void time0()interrupt 1 //定时器0 服务
{
// TR1=0;//关掉定时器1
// TH0=(65535-50000)/255; //定时器1高位装初值
// TL0=(65535-50000)%255;; //定时器1高位装初值 */
TH0=60; //定时器1高位装初值
TL0=235;; //定时器1高位装初值
m_second++;
if(m_second==20){
TR1=0;//关掉定时器1
TR0=0; // 关掉定时器0
m_second=0;
flag=1;
}
}
void time1()interrupt 3 //定时器1 服务
{
pluse++;
TH1=0;
TL1=0;
}
void Measurement_L()
{
if(f==0){
LZ=0;
Lcd_ShowSring(4,0,code_L);
}
else {
LZ=5.63466627*10e10/f/f;
LZ=LZ/1.0727272727272727272727272727273;
Lcd_ShowSring(4,0,"电感：");
Lcd_Display_u(4,4,LZ);
}
if(LZ>99999999) {
// Lcd_ShowSring(4,0,code_e);
}
}
void Measurement_R()//电阻测量
{
if(f==0){
RX=0;
}
else if( 0< f&& f<30) { //1M 7
RX= 14400000.0/f;
RX= RX-3000;
RX =RX/2/0.95; //修正
}
else if(f <700) { //10k 650
RX= 14400000.0/f;
RX= RX-3000;
RX =RX/2/0.95; //修正
//
}
else if(f <1500) { //4.7k 1209
RX= 14400000.0/f;
RX= RX-3000;
RX =RX/2/0.94; //修正
}
else if(f <3000) { //1k 2983
RX= 14400000.0/f;
RX= RX-3000;
RX =RX/2/0.91; //修正
//0.91286863270777479892761394101877
}
else if(f <4500) {
RX= 14400000.0/f;
RX= RX-3000;
//修正 200 4372
RX =RX/2/0.74; //修正
}
else if(f <5000) {
RX= 14400000.0/f;
RX= RX-3000;
//修正 100
RX =RX/2/0.50; //修正
}
if(RX==0){
Lcd_ShowSring(4,0,code_R);
} else{
Lcd_ShowSring(4,0,"电阻：");
Value_to_ASCII1(4,3, RX);
}
if(RX>99999999) {
// Lcd_ShowSring(4,0,code_e);
}
}
void Measurement_C()//C测量
{
if(f==0){
CX=0;
Lcd_ShowSring(4,0,code_C);
}
else if(f>5000){
CX=0;
Lcd_ShowSring(4,0,code_C);
}
else {
CX=48100.00/f/1.0276595744680851063829787234043;//修正
Lcd_ShowSring(4,0,"电容：");
Value_to_ASCIIC(4,3,CX);
}
// Lcd_ShowSring(4,0,"电容：");
// Value_to_ASCIIC(4,3,CX);
if(CX>99999999) {
// Lcd_ShowSring(4,0,code_e);
}
}

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