单片机简易计算器c代码

*/ #include #include #include #define uchar unsigned char#define DATA=P0sbit RS=P20;sbit RW=P21;sbit EN=P22;/*-函数声明 -*/void delay(unsigned int i);uchar keyscan(void);void LCD_Init(void);bit LCD_Busy(void);void LCD_Write_CMD(uchar command);void LCD_Write_DATA(uchar date);/*-delay-*/void delay(unsigned int i)/延时函数while(i-);/*-keyscan-*/uchar keyscan(void)/逐行扫描法uchar H_line,L_line,Num=0;/行列值P3=0x1e; /行线第一条为 0L_line=P1 /读入列线值if(L_line!=0x1f) /先检测有无按键按下delay(100); /去抖L_line=P1 /读入列线值 if(L_line!=0x1f)switch(L_line)case 0x0f:Num=7;break;/7 按下相应的键显示相对应的码值case 0x17:Num=8;break;/8case 0x1b:Num=9;break;/9case 0x1d:Num=F;break;/Fcase 0x1e:Num=+;break;/+while(P1!=0xff) /一次按键检测，松手跳出循环H_line=P3 delay(50);P3=0x1d; /行线第二条为 0L_line=P1 /读入列线值if(L_line!=0x1f) /先检测有无按键按下delay(100); /去抖L_line=P1 /读入列线值 if(L_line!=0x1f)switch(L_line)case 0x0f:Num=4;break;/4 按下相应的键显示相对应的码值case 0x17:Num=5;break;/5case 0x1b:Num=6;break;/6case 0x1d:Num=E;break;/Ecase 0x1e:Num=-;break;/-while(P1!=0xff) /一次按键检测，松手跳出循环H_line=P3 delay(50);P3=0x1b; /行线第三条为 0L_line=P1 /读入列线值if(L_line!=0x1f) /先检测有无按键按下delay(100); /去抖L_line=P1 /读入列线值 if(L_line!=0x1f)switch(L_line)case 0x0f:Num=1;break;/1 按下相应的键显示相对应的码值case 0x17:Num=2;break;/2case 0x1b:Num=3;break;/3case 0x1d:Num=D;break;/Dcase 0x1e:Num=*;break;/*while(P1!=0xff) /一次按键检测，松手跳出循环H_line=P3 delay(50);P3=0x17; /行线第四条为 0L_line=P1 /读入列线值if(L_line!=0x1f) /先检测有无按键按下delay(100); /去抖L_line=P1 /读入列线值 if(L_line!=0x1f)switch(L_line)case 0x0f:Num=0;break;/0 按下相应的键显示相对应的码值case 0x17:Num=A;break;/Acase 0x1b:Num=B;break;/Bcase 0x1d:Num=C;break;/Ccase 0x1e:Num=/;break;/while(P1!=0xff) /一次按键检测，松手跳出循环H_line=P3 delay(50);P3=0x0f; /行线第五条为 0L_line=P1 /读入列线值if(L_line!=0x1f) /先检测有无按键按下delay(100); /去抖L_line=P1 /读入列线值 if(L_line!=0x1f)switch(L_line)case 0x0f:Num=b;break;/b 按下相应的键显示相对应的码值case 0x17:Num=o;break;/ocase 0x1b:Num=h;break;/hcase 0x1d:Num=R;break;/Rcase 0x1e:Num=;break;/=号while(P1!=0xff) /一次按键检测，松手跳出循环H_line=P3 while(Num!=0)return Num;/*-LCD_Init-*/void LCD_Init(void)EN=0;LCD_Write_CMD(0x38);delay(15);LCD_Write_CMD(0x38);delay(15);LCD_Write_CMD(0x38);delay(15);LCD_Write_CMD(0x0d);delay(15);LCD_Write_CMD(0x06);delay(15);LCD_Write_CMD(0x01);/*-LCD_Busy-*/bit LCD_Busy(void)bit result;RS=0; /读指令RW=1; EN=1; _nop_();_nop_();_nop_();_nop_();result=(bit)(P0EN=0;return result;/*-LCD_Write_CMD-*/void LCD_Write_CMD(uchar command) bit Busy_flag;Busy_flag=LCD_Busy();while(Busy_flag)Busy_flag=LCD_Busy(); / 判RS=0;RW=0;EN=1;P0=command;delay(100);EN=0;/*-LCD_Write_DATA-*/void LCD_Write_DATA(uchar date) bit Busy_flag;Busy_flag=LCD_Busy();while(Busy_flag)Busy_flag=LCD_Busy(); / 判断 LCD 是否忙碌RS=1;RW=0;EN=1;P0=date;delay(10);EN=0;/*-main-*/void main(void)uchar key;long int num1=0,num2=0,result=0;int cnt1=0,cnt2=0,k;unsigned int flagcal=0,flagtrs=0;/运算符标志uchar rem0,rem1,rem2;/存放运算符char num;unsigned char data Str110=0;/存放数据LCD_Init();LCD_Write_CMD(0x80);/ 设置显示位置 ( 第一行开头 )delay(500);LCD_Write_DATA(0);/测试用LCD_Write_CMD(0x80);while(1)key=keyscan();if(key=R)LCD_Write_CMD(0x01);LCD_Write_CMD(0x80);LCD_Write_DATA(0);LCD_Write_CMD(0x80);break;/*-基本运算-*/ if (!(key=o|key=b|key=h) if(flagtrs=1) /进制转换启动条件Str1cnt1+=key; /能存上了if(rem1=o) if(key=Aelse result=num2-num1;break;case *:result=num1*num2;num2=0;num1=0;break;case /:if(num2!=0)result=num1/num2;else result=999999999;num2=0;num1=0;break;default :result=num1;break;if(result99999999|result-99999999) /溢出错误LCD_Write_CMD(0x01);LCD_Write_CMD(0x80);LCD_Write_DATA(E);LCD_Write_DATA(r);LCD_Write_DATA(r);break;result=0;LCD_Write_CMD(0x01);LCD_Write_CMD(0x80);LCD_Write_DATA(0);LCD_Write_CMD(0x80);for(;result!=0;) num=result%10+0;LCD_Write_DATA(num);result/=10;if(num1num2)LCD_Write_DATA(-); /*- 进制转换-*/ else if(flagtrs=0)LCD_Write_DATA(key);flagtrs=1;switch(key)case o:rem1=o;break;case b:rem1=b;break;case h:rem1=h;break;elseLCD_Write_DATA(key);flagtrs=2;switch(key)case o:rem2=o;break;case b:rem2=b;break;case h:rem2=h;break;if(rem1=oLCD_Write_DATA(o);LCD_Write_DATA(-);LCD_Write_DATA(b);LCD_Write_CMD(0x8f);LCD_Write_CMD(0x04);cnt2=cnt1-1;num1=cnt1+0;LCD_Write_DATA(b);num1=0;/num=cnt2+0;/LCD_Write_DATA(num); /测试用。发现 Str 里面没有数据/* for(cnt1=0;cnt1=cnt2;cnt1+)num1=num1*10+Str1cnt1-0;for(;num1!=0;) /测试正确num=num1%2+0;LCD_Write_DATA(num);num1=num1/2;*/num1=0;if(rem1=oLCD_Write_DATA(o);LCD_Write_DATA(-);LCD_Write_DATA(h);LCD_Write_CMD(0x8f);LCD_Write_CMD(0x04);cnt2=strlen(Str1);for(cnt1=0;cnt1cnt2;cnt1+)num1=num1*10+Str1cnt1-0;for(;num1!=0;)num=num1/16+0;LCD_Write_DATA(num);num1=num1%16;num1=0; if(rem1=hLCD_Write_DATA(h);LCD_Write_DATA(-);LCD_Write_DATA(b);LCD_Write_CMD(0x8f);LCD_Write_CMD(0x04);cnt2=strlen(Str1);for(cnt1=0;cnt1cnt2;cnt1+)switch(Str1cnt1)caseF:LCD_Write_DATA(1);LCD_Write_DATA(1);LCD_Write_DATA(1);LCD_Write_DATA(1);break;caseE:LCD_Write_DATA(1);LCD_Write_DATA(1);LCD_Write_DATA(1);LCD_Write_DATA(0);break;caseD:LCD_Write_DATA(1);LCD_Write_DATA(1);LCD_Write_DATA(0);LCD_Write_DATA(1);break;caseC:LCD_Write_DATA(1);LCD_Write_DATA(1);LCD_Write_DATA(0);LCD_Write_DATA(0);break;caseB:LCD_Write_DATA(1);LCD_Write_DATA(0);LCD_Write_DATA(1);LCD_Write_DATA(1);break;caseA:LCD_Write_DATA(1);LCD_Write_DATA(0);LCD_Write_DATA(1);LCD_Write_DATA(0);break;case9:LCD_Write_DATA(1);LCD_Write_DATA(0);LCD_Write_DATA(0);LCD_Write_DATA(1);break;case8:LCD_Write_DATA(1);LCD_Write_DATA(0);LCD_Write_DATA(0);LCD_Write_DATA(0);break;case7:LCD_Write_DATA(0);LCD_Write_DATA(1);LCD_Write_DATA(1);LCD_Write_DATA(1);break;case6:LCD_Write_DATA(0);LCD_Write_DATA(1);LCD_Write_DATA(1);LCD_Write_DATA(0);break;case5:LCD_Write_DATA(0);LCD_Write_DATA(1);LCD_Write_DATA(0);LCD_Write_DATA(1);break;case4:LCD_Write_DATA(0);LCD_Write_DATA(1);LCD_Write_DATA(0);LCD_Write_DATA(0);break;case3:LCD_Write_DATA(0);LCD_Write_DATA(0);LCD_Write_DATA(1);LCD_Write_DATA(1);break; case2:LCD_Write_DATA(0);LCD_Write_DATA(0);LCD_Write_DATA(1);LCD_Write_DATA(0);break;case1:LCD_Write_DATA(0);LCD_Write_DATA(0);LCD_Write_DATA(0);LCD_Write_DATA(1);break;case0:LCD_Write_DATA(0);LCD_Write_DATA(0);LCD_Write_DATA(0);LCD_Write_DATA(0);break; if(rem1=hLCD_Write_DATA(h);LCD_Write_DATA(-);LCD_Write_DATA(o);LCD_Write_CMD(0x8f);LCD_Write_CMD(0x04); cnt2=strlen(Str1);for(cnt1=0;cnt1cnt2;cnt1+) num1=num1*16+Str1cnt1-0;for(;num1!=0;) num=num1%10+0;LCD_Write_DATA(num);num1/=10;num1=0;if(rem1=bLCD_Write_DATA(b);LCD_Write_DATA(-);LCD_Write_DATA(o);LCD_Write_CMD(0x8f);LCD_Write_CMD(0x04);cnt2=strlen(Str1);for(cnt1=0;cnt1cnt2;cnt1+) num1=num1*2+Str1cnt1-0;for(;num1!=0;) num=num1%10+0;LCD_Write_DATA(num);num1/=10;num1=