掉电记忆程序.doc

三：功能/基于mcs51-u的按键计数器（产品计数器，含掉电记忆）/功能：s1用于加计数，s2用于计数归零；s3用于减计数#include unsigned int Count;/*键盘子程序*sbit pl= P36; /165锁存sbit clk_j=P37; /165时钟sbit Do= P35; /165串口数据unsigned char bdata key; sbit s1=key0; sbit s2=key1;sbit s3=key2;sbit s4=key3;sbit s5=key4;sbit s6=key5;sbit s7=key6;sbit s8=key7; Readkey()unsigned char i;clk_j=0;pl=0;pl=1;for(i=0;i8;i+) key=1; key|=(bit)Do; clk_j=1; clk_j=0; /*以上键盘子程序*/*以下数码管显示子程序*sbit dat=P10; /定义驱动74595的数据脚为p1.0sbit clk=P11; /74595的时钟sbit lat=P12; /栓锁sbit gw=P13; /个位显示控制脚sbit sw=P14; /十位sbit bw=P33; /百位sbit qw=P34; /千位/-字表-unsigned char code tab= 0x3F,0x06,0x5B,0x4F, /0,1,2,3 0x66,0x6D,0x7D,0x07, /4,5,6,7 0x7F,0x6F,0x77,0x7c, /8,9,A,B 0x39,0x5e,0x79,0x71, /C,D,E,F ;/-显示延时-ds1ms()unsigned char d; for(d=0;d250;d+); /-74HC595段输出循环-dsout(unsigned char j)unsigned char i; for(i=0;i8;i+) dat=j&0x80; /提取高位 clk=1; clk=0; j=1; lat=1; lat=0; /锁存/-74HC595位输出循环-display(unsigned char sjqw,sjbw,sjsw,sjgw) dsout(tabsjgw); /查表得到数据段码送显示 gw=0; ds1ms(); gw=1; dsout(tabsjsw); sw=0; ds1ms(); sw=1; dsout(tabsjbw); bw=0; ds1ms(); bw=1; dsout(tabsjqw); qw=0; ds1ms(); qw=1; /*以上数码管显示子程序*/*以下2402读写子程序*/sbit WP=P21; /写保护sbit SCL=P22; /2402 IO 口定义sbit SDA=P23;#define W_cmd 0xa0 /写指令#define R_cmd 0xa1 /读指令 void Dely24(void) unsigned char i; for(i=0;i6;i+);/*void Dely24_10ms(void)unsigned int i; for(i=0;i500;i+);/*24x02开始程序*void star24(void) Dely24(); SDA=0; Dely24(); SCL=0; Dely24(); /*24停止程序*void stop24(void) Dely24(); SCL=1; Dely24(); SDA=1; Dely24(); /*unsigned char ReadByte(void) unsigned char i,j; for(i=0;i8;i+) /循环读8位 SDA=1; /置高，不影响后续读取 Dely24(); SCL=1; Dely24(); j=1; j|=(bit)SDA; /读1位 Dely24(); SCL=0; Dely24(); SDA=0; return(j);/*void SendByte(unsigned char SendDat) unsigned char i,j; for(i=0;i8;i+) /循环8次 j=SendDat; SDA=j&0x80; /送出1位 Dely24(); SCL=1; Dely24(); SCL=0; SendDat0;i-) for(j=248;j0;j-); /*void main(void) WP=1; Count=0; Count=ReadIIC(W_cmd,0x00,R_cmd)+ReadIIC(W_cmd,0x01,R_cmd)*256; / 读0x00，0X01地址数据送Count while(1) Readkey(); display(Count/1000,Count%1000/100,Count%1000%100/10,Count%10); if(s1=0) delay10ms(); if(s1=0) /加计数程序 Count+; if(Count=10000) Count=0; delay10ms(); WP=0; / 允许写。 WriIIC(W_cmd,0x00,Count%256); delay10ms(); WriIIC(W_cmd,0x01,Count/256); delay10ms(); WP=1; while(s1=0) Readkey(); display(Count/1000,Count%1000/100,Count%1000%100/10,Count%10); if(s2=0) /归零程序 Count=0; WP=0; WriIIC(W_cmd,0x00,0); delay10ms(); WriIIC(W_cmd,0x01,0); delay10ms(); WP=1; if(s3=0) /减计数程序 delay10ms(); if(s3=0) Count-; if(Count=10000) Count=0; delay10ms(); WP=0; WriIIC(W_cmd,0x00,Count%256); delay10ms(); W