at89c51和LCD1602显示日期

#include #include #include / 定义控制信号端口sbit RS=P32;sbit RW=P33; sbit E= P34; void lcd_init();void delay100us(unsigned char t); void delay5us(unsigned char n);void delay1s(z);void disp(char tab);void lcd_zdy(char com,char tab);unsigned char lcd_r_start();void lcd_w_cmd(unsigned char com);void lcd_w_dat(unsigned char dat); main() char year=2017; char month=05 ; char day=11 ; char nian=0x04,0x0F,0x72,0x0F,0x0A,0x1F,0x02,0x00; char yue=0x1E,0x12,0x1E,0x12,0x1E,0x12,0x16,0x00; char ri=0x1E,0x12,0x12,0x1E,0x12,0x12,0x1E,0x00; char wish=happy day;while(1) char x; P1=0xff; / 送全1到P1口 lcd_init(); delay100us(255); lcd_zdy(0x40,nian); lcd_zdy(0x48,yue); lcd_zdy(0x50,ri); lcd_w_cmd(0x82); disp(year); lcd_w_dat(0x00); disp(month); lcd_w_dat(0x01); disp(day); lcd_w_dat(0x02); delay1s(2); for(x=0;x16;x+) lcd_w_cmd(0x18);delay100us(255); lcd_w_cmd(0x92);disp(wish);delay1s(2); void lcd_zdy(char com,char tab) char i; lcd_w_cmd(com); for(i=0;i8;i+) lcd_w_dat(tabi); delay100us(200); /函数名：delay100us/函数功能：采用软件实现延时，基准延时时间为100us(12MHz晶振)，共延时100*lus /形式参数：延时时间控制参数存入变量t中/返回值：无void delay100us(unsigned char t) unsigned char j,i; for(i=0;it;i+) for(j=0;j10;j+); /函数名:delay5us/函数功能:精确延时n*5us子程序/形式参数:延时时间参数n,unsigned char 类型/返回值:无void delay5us(unsigned char n) do _nop_(); _nop_(); _nop_(); n-; while(n);/函数名：lcd_init/函数功能：lcd初始化 /形式参数：无/返回值：无void lcd_init() lcd_w_cmd(0x3c); / 00111100设置工作方式 lcd_w_cmd(0x0e); / 设置光标 lcd_w_cmd(0x01); / 清屏 lcd_w_cmd(0x06); / 设置输入方式 lcd_w_cmd(0x80); / 设置初始显示位置unsigned char lcd_r_start() unsigned char s; RW=1;/RW=1，RS=0，读LCD状态 delay5us(1); RS=0; delay5us(1); E=1;/E端时序 delay5us(1); s=P1;/从LCD的数据口读状态 delay5us(1); E=0; delay5us(1); RW=0; delay5us(1); return(s);/返回读取的LCD状态字void lcd_w_cmd(unsigned char com) unsigned char i; do / 查LCD忙操作 i=lcd_r_start(); / 调用读状态字函数 i=i&0x80; / 与操作屏蔽掉低7位 delay100us(2); while(i!=0); / LCD忙，继续查询，否则退出循环 RW=0; delay5us(1); RS=0; / RW=1，RS=0，写LCD命令字 delay5us(1); E=1; /E端时序 delay5us(1); P1=com; /将com中的命令字写入LCD数据口 delay5us(1); E=0; delay5us(1); RW=1; delay100us(255);/函数名：lcd_w_dat/函数功能：写数据/形式参数：数据已存入dat单元中/返回值：无void lcd_w_dat(unsigned char dat) unsigned char i; do / 查忙操作 i=lcd_r_start();/ 调用读状态字函数 i=i&0x80; / 与操作屏蔽掉低7位 delay100us(2); while(i!=0); / LCD忙，继续查询，否则退出循环 RW=0; delay5us(1); RS=1;/ RW=1，RS=0，写LCD命令字 delay5us(1); E=1;/ E端时序 delay5us(1); P1=dat;/ 将dat中的显示数据写入LCD数据口 delay5us(1); E=0; delay5us(1); RW=1; delay100us(255);void disp(char tab) char i,j; j=strlen(tab); /j=sizeof(tab)-1; for(i=0;ij;i+) / 显示字符串 lcd_w_dat(tabi); delay100us