随着Internet技术的发展，人们的日常生活已经离不开网络。未来社会人们的生活和工作将越来越依赖于数字技术的发展，越来越数字化、网络化、电子化、虚拟化。Internet的发展历程以及目前的应用状况和发展趋势，可以充分地相信网络技术将极大的改变我们的生活和工作方式，甚至社会的价值观也会发生某种变化。
本设计实现在二进制、八进制、十进制间的转换。主要用到的是STC89C52RC系列的单片机，LCD1602显示屏以及4x4矩阵键盘。首先进行模式选择（共有六种模式）然后从矩阵键盘输入要转换的数字，按下转换键，在LCD1602显示屏上显示结果。
将4×4矩阵键盘的S1、S2、S3、S5、S6、S7、S9、S10、S11、S14设为数字键（0~9），S15设置为功能键，S16为转换键。有六种进制转换的选项（B，O，D之间相互转换）。
#include#include sbit RS = P1^0; //定义端口 sbit RW = P1^1; sbit EN = P2^5; sbit DU = P2^6; sbit WE = P2^7; #define RS_CLR RS=0 #define RS_SET RS=1 #define RW_CLR RW=0 #define RW_SET RW=1 #define EN_CLR EN=0 #define EN_SET EN=1 #define DataPort P0 void cmg88()//关数码管，点阵函数 { DU=1; WE=1; P0=0x00; DU=0; WE=0; } void DelayUs2x(unsigned char t) { while(--t); } void DelayMs(unsigned char t) { while(t--) { //大致延时1mS DelayUs2x(245); DelayUs2x(245); } } bit LCD_Check_Busy(void) { DataPort= 0xFF; RS_CLR; RW_SET; EN_CLR; _nop_(); EN_SET; return (bit)(DataPort & 0x80); } void LCD_Write_Com(unsigned char com) { while(LCD_Check_Busy()); //忙则等待 RS_CLR; RW_CLR; EN_SET; DataPort= com; _nop_(); EN_CLR; } void LCD_Write_Data(unsigned char Data) { while(LCD_Check_Busy()); //忙则等待 RS_SET; RW_CLR; EN_SET; DataPort= Data; _nop_(); EN_CLR; } //---------------------------------------------- void LCD_Clear(void) { LCD_Write_Com(0x01); DelayMs(5); } void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s) { if (y == 0) { LCD_Write_Com(0x80 + x); //表示第一行 } else { LCD_Write_Com(0xC0 + x); //表示第二行 } while (*s) { LCD_Write_Data( *s); s ++; } } void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data) { if (y == 0) { LCD_Write_Com(0x80 + x); } else { LCD_Write_Com(0xC0 + x); } LCD_Write_Data( Data); } void LCD_Init(void) { LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); LCD_Write_Com(0x08); LCD_Write_Com(0x01); LCD_Write_Com(0x06); DelayMs(5); LCD_Write_Com(0x0C); } void delay(unsigned int xms) //延迟xms { unsigned char i,j; for(i=xms;i>0;i--) for(j=112;j>0;j--); } void Transform10To2(unsigned int num){ unsigned char e,x=0; unsigned long int n=2; while(1){ //计算需要几个二进制位表示这个数字 n*=2; x++; if(n>num) break; } // LCD_Write_Char(14,1,x+0x30); while(x>=0){ e=num%2; LCD_Write_Char(x+2,1,e+0x30); num=num/2; x--; if(x==-1) break; } } void TransformTo10(unsigned long int num){ unsigned char e,x=0; unsigned long int n=10; while(1){ //计算需要几个十进制位表示这个数字 n*=10; x++; if(n>num) break; } // LCD_Write_Char(14,1,x+0x30); while(x>=0){ e=num%10; LCD_Write_Char(x+2,1,e+0x30); num=num/10; x--; if(x==-1) break; } } void Transform10To8(unsigned long int num){ unsigned char e,x=0; unsigned long int n=8; while(1){ //计算需要几个八进制位表示这个数字 n*=8; x++; if(n>num) break; } // LCD_Write_Char(14,1,x+0x30); while(x>=0){ e=num%8; LCD_Write_Char(x+2,1,e+0x30); num=num/8; x--; if(x==-1) break; } } char keyscan4x4() { unsigned char temp,key; ///第一行扫描/// P3=0xfe;//1111 1110 让P3.0口输出低 temp=P3; temp=temp&0xf0;//1111 0000 位与操作 屏蔽后四位 if(temp!=0xf0) { delay(10); //消抖 temp=P3; temp=temp&0xf0; if(temp!=0xf0) { temp=P3; //i++; switch(temp) { case 0xee: //1110 1110 S1被按下 key=7; break; case 0xde: //1101 1110 S2被按下 key=8; break; case 0xbe: //1011 1110 S3被按下 key=9; break; } while(temp!=0xf0) { temp=P3; temp=temp&0xf0; } //display(i-1,0,key); return key; } } ///第二行扫描/// P3=0xfd;//1111 1101 让P3.1口输出低 temp=P3; temp=temp&0xf0;//1111 0000 位与操作 屏蔽后四位 if(temp!=0xf0) { delay(10); temp=P3; temp=temp&0xf0; if(temp!=0xf0) { temp=P3; //i++; switch(temp) { case 0xed: //1110 1101 S5被按下 key=4; break; case 0xdd: //1101 1101 S6被按下 key=5; break; case 0xbd: //1011 1101 S7被按下 key=6; break; } while(temp!=0xf0) { temp=P3; temp=temp&0xf0; } //display(i-1,0,key); return key; } } ///第三行扫描/// P3=0xfb;//1111 1011 让P3.2口输出低 temp=P3; temp=temp&0xf0;//1111 0000 位与操作 屏蔽后四位 if(temp!=0xf0) { delay(10); temp=P3; temp=temp&0xf0; if(temp!=0xf0) { temp=P3; //i++; switch(temp) { case 0xeb: //1110 1011 S9被按下 key=1; break; case 0xdb: //1101 1011 S10被按下 key=2; break; case 0xbb: //1011 1011 S11被按下 key=3; break; } while(temp!=0xf0) { temp=P3; temp=temp&0xf0; } //display(i-1,0,key); return key; } } ///第四行扫描/// P3=0xf7;//1111 0111 让P3.0口输出低 temp=P3; temp=temp&0xf0;//1111 0000 位与操作 屏蔽后四位 if(temp!=0xf0) { delay(10); temp=P3; temp=temp&0xf0; if(temp!=0xf0) { temp=P3; //i++; switch(temp) { case 0xd7: //1101 0111 S14被按下 key=0; break; case 0xb7: //1011 0111 S15被按下，功能选择 key=11; break; case 0x77: key=10; //0111 0111 S16被按下,确认转化 break; } while(temp!=0xf0) { temp=P3; temp=temp&0xf0; } //display(i-1,0,key); return key; } } return -1; } void main() { unsigned long int number; unsigned char key,i=0,count=0,g; cmg88(); //关数码管，点阵函数 DelayMs(15); LCD_Init(); LCD_Clear(); //清屏 LCD_Write_String(0,0,"Select function"); while(1) { key=keyscan4x4(); if(key==11){ //功能选择 g=count%6+1; //count++; } switch(g){ case 1: //十进制转二进制 //LCD_Write_String(0,0,"D:"); //LCD_Write_String(0,1,"B:"); if(i==0&&key!=-1&&key!=11){ LCD_Clear(); LCD_Write_String(0,0,"D:"); LCD_Write_String(0,1,"B:"); } if(key!=-1&&key!=11){ if(key==10){ //按下确定按钮后 //LCD_Write_Char(i,0,key+0x30); if(number>16383){ //判断是否超过范围 LCD_Write_String(2,1,"error!"); number=0; i=0; continue; //使输入确定键转化后不让10计算到number中 }else{ //未超过范围则转化为二进制 Transform10To2(number); number=0; //key=-1; i=0; continue; } } else{ LCD_Write_Char(i+2,0,key+0x30); //第一行显示输入的数字 i++; //输入数字的位置 } number=key+number*10; //将输入的数字字符转化为十进制 } if(key==11){ count++; LCD_Clear(); LCD_Write_String(0,0,"D:"); LCD_Write_String(0,1,"B:"); //while(1); //key=-1; //break; } //} break; case 2: //二进制转十进制 //LCD_Write_String(0,0,"B:"); //LCD_Write_String(0,1,"D:"); if(i==0&&key<=1){ LCD_Clear(); LCD_Write_String(0,0,"B:"); LCD_Write_String(0,1,"D:"); } if(key==0||key==1||key==10){ switch(key){ case 10: TransformTo10(number); number=0; i=0; break; default: LCD_Write_Char(i+2,0,key+0x30); i++; number=key+number*2; } } if(key==11){ count++; LCD_Clear(); LCD_Write_String(0,0,"B:"); LCD_Write_String(0,1,"D:"); break; } //} break; case 3: //八进制转二进制 //LCD_Write_String(0,0,"O:"); // LCD_Write_String(0,1,"B:"); if(i==0&&key>=0&&key<=7){ LCD_Clear(); LCD_Write_String(0,0,"O:"); LCD_Write_String(0,1,"B:"); } if((key>=0&&key<=7)||key==10){ switch(key){ case 10: if(number>16383){ //判断是否超过范围 LCD_Write_String(2,1,"error!"); number=0; i=0; continue; }else{ //未超过范围则转化为二进制 Transform10To2(number); number=0; i=0; continue; } break; default: LCD_Write_Char(i+2,0,key+0x30); i++; number=key+number*8; } } if(key==11){ count++; LCD_Clear(); LCD_Write_String(0,0,"O:"); LCD_Write_String(0,1,"B:"); break; } break; case 4: //二进制转八进制 //LCD_Write_String(0,0,"B:"); //LCD_Write_String(0,1,"O:"); if(i==0&&key<=1){ LCD_Clear(); LCD_Write_String(0,0,"B:"); LCD_Write_String(0,1,"O:"); } if(key==0||key==1||key==10){ switch(key){ case 10: Transform10To8(number); number=0; i=0; break; default: LCD_Write_Char(i+2,0,key+0x30); i++; number=key+number*2; } } if(key==11){ count++; LCD_Clear(); LCD_Write_String(0,0,"B:"); LCD_Write_String(0,1,"O:"); break; } break; case 5: //八进制转十进制 //LCD_Write_String(0,0,"O:"); //LCD_Write_String(0,1,"D:"); if(i==0&&key<=7&&key>=0){ LCD_Clear(); LCD_Write_String(0,0,"O:"); LCD_Write_String(0,1,"D:"); } if((key<=7&&key>=0)||key==10){ switch(key){ case 10: if(number>4294967290){ //判断是否超过范围 LCD_Write_String(2,1,"error!"); number=0; i=0; continue; }else{ TransformTo10(number); number=0; i=0; } break; default: LCD_Write_Char(i+2,0,key+0x30); i++; number=key+number*8; } } if(key==11){ count++; LCD_Clear(); LCD_Write_String(0,0,"O:"); LCD_Write_String(0,1,"D:"); break; } break; case 6: //十进制转八进制 //LCD_Write_String(0,0,"D:"); //LCD_Write_String(0,1,"O:"); if(i==0&&key!=-1&&key!=11){ LCD_Clear(); LCD_Write_String(0,0,"D:"); LCD_Write_String(0,1,"O:"); } if(key!=-1&&key!=11){ switch(key){ case 10: ; if(number>4294967290){ //判断是否超过范围 LCD_Write_String(2,1,"error!"); number=0; i=0; continue; }else{ Transform10To8(number); number=0; i=0; continue; } break; default: LCD_Write_Char(i+2,0,key+0x30); //第一行显示输入的数字 i++; number=key+number*10; } } if(key==11){ count++; LCD_Clear(); LCD_Write_String(0,0,"D:"); LCD_Write_String(0,1,"O:"); break; } break; } continue; } while(1); }
