51单片机 直流电机测速L298n+1602显示 proteus仿真加工程源码 原创可完美运行

#include<reg52.h> #define uchar unsigned char #define uint unsigned int sbit PW1=P1^0 ; sbit PW2=P1^1 ; //控制电机的两个输入 sbit PW3=P1^2 ; //输出pwm sbit accelerate=P0^2 ; //调速按键 sbit stop=P0^3 ; //停止按键 sbit left=P0^4 ; //左转按键 sbit right=P0^5 ; //右转按键 sbit detect=P3^2; //检测脉冲 sbit lcdrs=P0^0; sbit lcden=P0^1; #define Da P2 uint temp; //保存检测到的电平数据以便比较 uint count; //用于计数 uint aa,bb; //用于计数 uint speed; //用来计算转速 uint a=25000; uint t0=25000,t1=25000; //初始时占空比为50% uchar flag=1; //此标志用于选择不同的装载初值 uchar dflag; //左右转标志 uchar sflag=1; //用来标志速度档位 #define right_turn PW1=0;PW2=1;PW3=0; //顺时针转动 #define left_turn PW1=1;PW2=0;PW3=0; //逆向转动 #define end_turn PW1=1;PW2=1;PW3=1; //停转 void keyscan(); //键盘扫描 void delay(uchar z); void time_init(); //定时器的初始化 void write_com(uchar com); //液晶写指令 void write_data(uchar date); //液晶写数据 void lcd_init(); //液晶初始化 void display(uint rate); //显示速度 void int0_init(); //定时器0初始化 void judge_derection(); void main() { time_init(); //定时器的初始化 lcd_init(); //液晶初始化 int0_init(); //定时器0初始化 while(1) { } } //定时器0用来计算转速 //定时器1用来产生PWM void time_init() { TMOD=0x11; //两个定时器都设定为工作方式1 十六位定时计数器 EA=1; //开启总中断 TH0=(65536-50000)/256; TL0=(65536-50000)%256; ET0=1; TR0=1; TH1=(65536-a)/256; TL1=(65536-a)%256; ET1=1; TR1=0; } void int0_init() { EX0=1;//外部中断源可以申请中断 IT0=1;//外部中断源下降沿触发 } void timer0() interrupt 1 using 0 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; //装载初值 keyscan(); //键盘扫描程序 aa++; if(aa==5) { aa=0; temp=count*0.5*60*2*2*100/24; //计算转速，每分转多少圈 count=0; //重新开始计数脉冲数 display(temp); //把计算得的结果显示出来 } } void timer1() interrupt 3 using 0 { if(flag) { flag=0; end_turn; a=t0; //t0的大小决定着低电平延续时间 TH1=(65536-a)/256; TL1=(65536-a)%256; //重装载初值 } else { flag=1; //这个标志起到交替输出高低电平的作用 if(dflag==0) { right_turn; //右转 } else { left_turn; //左转 } a=t1; //t1的大小决定着高电平延续时间 TH1=(65536-a)/256; TL1=(65536-a)%256; //重装载初值 } } /*******外部中断*******************/ void service_int0() interrupt 0 { count++; //来一个下降沿沿就计一个脉冲数 } /*******显示函数***********/ void display(uint rate) { uchar wan,qian, bai,shi,ge; wan=rate/10000; qian=rate/1000%10; bai=rate/100%10; shi=rate/10%10; ge=rate%10; write_com(0x80); write_data('0'+wan); write_data('0'+qian); write_data('0'+bai); write_data('.'); write_data('0'+shi); write_data('0'+ge); } /******延时函数********/ void delay(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--) ; } /************写指令************/ void write_com(uchar com) { lcdrs=0; Da=com; delay(1); lcden=1; delay(1); lcden=0; } /************写数据**********/ void write_data(uchar date) { lcdrs=1; Da=date; delay(1); lcden=1; delay(1); lcden=0; } /************液晶初始化**********/ void lcd_init() { lcden=0; write_com(0x38) ; //初始化 write_com(0x0c) ; //打开光标 0x0c不显示光标 0x0e光标不闪，0x0f光标闪 write_com(0x01) ; //清显示 write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('0'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('0'); } /***********键盘扫描程序**********/ void keyscan() { if(stop==0) { TR1=0; //关闭定时器0 即可停止转动 end_turn; // 停止供电 write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('0'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('0'); } if(left==0) { TR1=1; dflag=1; //转向标志置位则左转 write_com(0x80+0x40+10); //write_data('0'+sflag); write_data('L'); write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('1'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('1'); } if(right==0) { TR1=1; dflag=0; //转向标志复位则右转 write_com(0x80+0x40+10); write_data('R'); write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('1'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('1'); //write_data('0'+sflag); } if(accelerate==0) { delay(10) ; //延时消抖 if(accelerate==0) { while(accelerate==0) ; //等待松手 sflag++; if(sflag==2) { t0=20000; t1=30000; //占空比为百分之60 write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('2'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('2'); } if(sflag==3) { t0=15000; t1=35000; //占空比为百分之70 write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('3'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('3'); } if(sflag==4) { t0=10000; t1=40000; //占空比为百分之80 write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('4'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('4'); } if(sflag==5) { t0=5000; t1=45000; //占空比为百分之90 write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('5'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('5'); } if(sflag>=6) { sflag=0; t0=25000; t1=25000; write_com(0x80+0x40); write_data('S'); write_data(':'); write_data('1'); write_data(' '); write_data(' '); write_data('P'); write_data(':'); write_data('1'); } } } }