大物实验.doc

大连海事大学 传感网技术一班 大物实验设计 2012-10-24附录:电路图（1）键盘模块（2）芯片模块（3）液晶显示模块整体电路图程序#include#include#define uchar unsigned char#define uint unsigned intchar translate(int keycode);void arithmetic();void init_LCM();void write_data(char ddata);void write_com(char command);void check_BF();void clearLCD();void display(long a);void dealerror(); void dataoverflow();/*定义变量和数组*/long x=0,y=0,num=0;int operators,input,iny=0;char key;char error5=error;char overflow8=overflow;sbit EN=P34;sbit R_W=P35;sbit RS=P36;/*主函数*/main()EA=1;EX0=1;IT0=1;P2=0xff;display(0);init_LCM();write_data(0x30);while(1)char translate(int keycode)switch(keycode)case 0:return 7;break;case 1:return 4;break;case 2:return 1;break;case 3:return c;break;case 4:return 8;break;case 5:return 5;break;case 6:return 2;break;case 7:return 0;break;case 8:return 9;break;case 9:return 6;break;case 10:return 3;break;case 11:return =;break;case 12:return /;break;case 13:return *;break;case 14:return -;break;case 15:return +;break; void INT_0(void) interrupt 0 using 0key=translate(P2&0x0f);if(key=0) num=num*10+(key-0);if (operators0)y=num;iny=1;elsex=num;if(num-134217728) /当前数值是否超出限定范围display(num);elsedataoverflow();elseswitch(key)case c:x=0;y=0;num=0;iny=0;operators=0;display(num);break;case =:arithmetic();iny=0;operators=0;num=0;break;case +: if (operators)arithmetic();operators=1;num=0;break;case -: if (operators)arithmetic();operators=2;num=0;break;case *: if (operators)arithmetic();operators=3;num=0;break;case /:if (operators)arithmetic();operators=4;num=0;break;void arithmetic()if (iny)switch(operators)case 1:x=x+y;num=x;if(num-134217728)display(num);elsedataoverflow();break;case 2:x=x-y;num=x;if(num-134217728)display(num);elsedataoverflow();break;case 3:x=x*y;num=x;if(num-134217728)display(num);elsedataoverflow();break;case 4:if (y=0)dealerror();elsex=x/y;num=x; if(num-134217728)display(num);elsedataoverflow();break;y=0;void init_LCM()write_com(0x30);write_com(0x30);write_com(0x30);write_com(0x38);write_com(0x08);write_com(0x01);write_com(0x06);write_com(0x0e);void write_data(char ddata)RS=1;/*写指令*/R_W=0;EN=1;/*使能信号开*/P1=ddata;/*将数据送入p1口*/EN=0;/*使能信号关*/check_BF();void write_com(char command)RS=0;/*写指令*/R_W=0;EN=1;/*使能信号开*/P1=command;/*将数据送入p1口*/EN=0;/*使能信号关*/check_BF();void check_BF()char i,x=0x80;P1=0xff;while(x&0x80)RS=0;R_W=1;EN=1;x=P1;EN=0;for (i=0;i10;i+);EN=0;/*关闭使能信号*/void clearLCD()write_com(0x01);void display(long a)long temp,b,c=-1;int lenth=1,i,j;clearLCD();if(a0;i-)b=1;for(j=0;ji-1;j+)b=b*10;write_data(0x30+a/b);a=a%b;void deale