2763.E简单电子计算器程序

1、#include #include #define rs p1_7#define rw p1_6#define e p1_5int keytime;/获取按键次数unsigned int a10;/获取数值数组最大10位int yunsuan;/运算符识别yunsuan=0;unsigned int num1;/获取第一个数unsigned int num2;/获取第二个数unsigned int num;/用于暂存unsigned int result;/获取结果void mdelay(unsigned char delaytime)/一个延时程序unsigned int j=0;for(;

2、delaytime0;delaytime-) for(j=0;j7)over();else lcd_output(+); yunsuan=1; suan1(); keytime=0; keyjian()if(keytime7)over();else lcd_output(-); yunsuan=2; suan1(); keytime=0;keycheng()if(keytime7)over();else lcd_output(*); yunsuan=3; suan1(); keytime=0;keychu()if(keytime7)over();else lcd_output(/); yuns

3、uan=4; suan1(); keytime=0;keydn()lcd_output(=);suan2();keytime=0;keyrst()yunsuan=0;keytime=0;num1=0;num2=0;result=0;num=0;send_i(0x01);send_i(0x80);/main()/主函数入口int keydown;/按键判定char keyno;/存放键值int tmp4;/暂存num1=0;num2=0;result=0;keytime=0;send_i(0x01);send_i(0x38);send_i(0x0c);/0x08 关send_i(0x06);se

4、nd_i(0x80);lcd_output(cal 08053543);mdelay(500);send_i(0x01);send_i(0x80);while(1)/进入键盘扫描循环tmp4=0xff;p3=0xf0;tmp4=p3;tmp4=tmp4 & 0xf0;if(tmp4=0xf0)keydown=0;if(tmp4!=0xf0)mdelay(30);if(tmp4!=0xf0)keydown=1;/有键elsekeydown=0;/无键if(keydown=1)if(keytime=16)send_i(0x80);keytime=0;/扫描获取键盘码p3=0xfe;keyno=p3

5、;switch(keyno)case 0x7e:keytime+;key1();break;case 0xbe:keytime+;key2();break;case 0xde:keytime+;key3();break;case 0xee:keytime+;key4();break;p3=0xfd;keyno=p3;switch(keyno)case 0x7d:keytime+;key5();break;case 0xbd:keytime+;key6();break;case 0xdd:keytime+;key7();break;case 0xed:keytime+;key8();break;p3=0xfb;keyno=p3;switch(keyno)case 0x7b:keytime+;key9();break;case 0xbb:keytime+;key0();break;case 0xdb:keyjia();break;case 0xeb:keyjian();break;p3=0xf7;keyno=p3;switch(keyno)case 0x77:keycheng();break;case