51按键程序.doc

#include #include #define uchar unsigned char#define uint unsigned intunsigned char code dis=Hello World!;unsigned char code dis1=KEY:;unsigned char code dis2=TIME:;uchar key_val=0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G;uchar code key_code=0x77,0x7B,0x7D,0x7E,0xB7,0xBB,0xBD,0xBE,0xD7,0xDB,0xDD,0xDE,0xE7,0xEB,0xED,0xEE;uchar key,x,count;uint time=0;sbit U3_DS=P15;sbit U3_STCP=P14;sbit U3_SHCP=P13;sbit U4_DS=P12;sbit U4_STCP=P11;sbit U4_SHCP=P10;void delay(unsigned int n);/74HC595void U3_595(unsigned char num)unsigned char count1;for (count1=0;count1=7;count1+)if (num&0x80)=0x80)/最高位为1，则向SDATA_595发送1U3_DS=1;elseU3_DS=0;U3_SHCP=0;U3_SHCP=1;num=1;/左移U3_STCP=0;U3_STCP=1;void U4_595(unsigned char num)/发送指令到RS,RW,E(4,5,6位)unsigned char count2;for (count2=0;count2=7;count2+)if(num&0x80)=0x80)U4_DS=1;elseU4_DS=0; U4_SHCP=0;U4_SHCP=1;num0;n-)for(i=0;i255;i+)_nop_();/写指令到LCDvoid wcmd(unsigned char cmd)U4_595(0x00);U3_595(cmd);U4_595(0x40);U4_595(0x00);/写要显示的数据到LCDvoid wdat(unsigned char dat)U4_595(0x10);U3_595(dat);U4_595(0x50);U4_595(0x10);/初始化LCDvoid init()wcmd(0x38);/设置8位总线双行显示，5*7点阵delay(20);wcmd(0x0C);/开显示，开光标，不闪烁delay(20);wcmd(0x06);/读写字符时地址加1delay(20);wcmd(0x01);/清屏delay(20);wcmd(0x80+2);for(x=0;x12;x+) /第一行显示hello world!wdat(disx);delay(20);wcmd(0xC2);for(x=0;x4;x+)/第二行显示按键和次数wdat(dis1x); wcmd(0xC8); for(x=0;x=0;i-)if(keycode=key_codei) /查找键码 key=i;return(key);else P0=0xff; /按键弹起则关闭定时器TR0=0; count=0;return (16); void keydown() /判断按键按下和显示程序 P0=0xf0;if(P0&0xf0)!=0xf0) TR0=1; /开启定时器while(P0!=0xf0)keyscan(); /获得键码if(count30) time+; count=0; else /超过1.5秒计数2次time+=2;count=0; wcmd(0xC6); /设置键值显示位置wdat(key_val16-key);wcmd(0xCD); /设置次数显示位置if(time9&time99&time1000)wdat(0x30+time/100);wdat(0x30+time/10-(time/100)*10);wdat(0x30+time%10); /中