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#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
#define C1 0.045
uchar code WenDu1[]="數(shù)\xfd字萬用表 ";
uchar code WenDu2[]="歡迎使用 ";
uchar code code_L[]="電感： ";
uchar code code_R[]="電阻： ";
uchar code code_C[]="電容： ";
uchar code code_e[]="錯(cuò)誤： ";
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");
}
}
}
//中斷初始化
void init()
{
// TMOD=0x11; //定時(shí)器0和定時(shí)器1都是方式1,16位定時(shí)器
//定時(shí)器設(shè)置
TMOD=0x51; //設(shè)置定時(shí)器0，方式1:16位定時(shí)器
TH1=0x00; //定時(shí)器1高位裝初值
TL1=0x00; //定時(shí)器1低位裝初值
ET1=1; //定時(shí)器1 使能位
TH0=(65535-50000)/255; //定時(shí)器1高位裝初值
TL0=(65535-50000)%255;; //定時(shí)器1高位裝初值
ET0=1; ////定時(shí)器0 使能位
TR0=1;
TR1=1;
EA=1;// 總中斷
}
void Measurement_L();//電感測(cè)量
void Measurement_R();//電阻測(cè)量
void Measurement_C();//電容測(cè)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里面記了這么多個(gè)脈沖
// 那么一個(gè)脈沖的周期就是 50ms/tt/1000 (s) 化簡(jiǎn)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; //定時(shí)器1高位裝初值
TL0=(65535-50000)%255;; //定時(shí)器1高位裝初值
TH1=0; //清零開始重新計(jì)數(shù)
TL1=0;
pluse=0;
TR0=1;//開定時(shí)器計(jì)時(shí)10ms;//使能位外部中斷0 數(shù)10內(nèi)有多少個(gè)脈沖
TR1=1;//進(jìn)行新一輪的計(jì)數(shù)
m_second=0;
// num++;
// Lcd_Display(4,4,num);
}
}
}
void time0()interrupt 1 //定時(shí)器0 服務(wù)
{
// TR1=0;//關(guān)掉定時(shí)器1
// TH0=(65535-50000)/255; //定時(shí)器1高位裝初值
// TL0=(65535-50000)%255;; //定時(shí)器1高位裝初值 */
TH0=60; //定時(shí)器1高位裝初值
TL0=235;; //定時(shí)器1高位裝初值
m_second++;
if(m_second==20){
TR1=0;//關(guān)掉定時(shí)器1
TR0=0; // 關(guān)掉定時(shí)器0
m_second=0;
flag=1;
}
}
void time1()interrupt 3 //定時(shí)器1 服務(wù)
{
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,"電感：");
Lcd_Display_u(4,4,LZ);
}
if(LZ>99999999) {
// Lcd_ShowSring(4,0,code_e);
}
}
void Measurement_R()//電阻測(cè)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,"電阻：");
Value_to_ASCII1(4,3, RX);
}
if(RX>99999999) {
// Lcd_ShowSring(4,0,code_e);
}
}
void Measurement_C()//C測(cè)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,"電容：");
Value_to_ASCIIC(4,3,CX);
}
// Lcd_ShowSring(4,0,"電容：");
// Value_to_ASCIIC(4,3,CX);
if(CX>99999999) {
// Lcd_ShowSring(4,0,code_e);
}
}

復(fù)制代碼

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