单片机课程设计 (51单片机实现电子时钟)(15)

用51单片机的最小系统和LCD1602显示的电子时钟

ET0=1; TR0=1; }

//-------写年月日---------------

void write_nyr(uchar add,uchar date) { uchar i,j; i=date/10; j=date%10; WriteInstruction(0x80+add); WriteData(0x30+i); WriteData(0x30+j); }

//--------写时分秒---------------

void write_sfm(uchar add,uchar date) { uchar i,j; i=date/10; j=date%10; WriteInstruction(0x80+0x40+add); WriteData(0x30+i); WriteData(0x30+j); }

//-------------写星期-------------

void write_week(uchar add,uchar date) { WriteInstruction(0x80+add); WriteData(0x30+date); }

//---------该年是否是闰年------------- bit leap_year() { int leap; if((year%4==0&&year%100!=0)||year%400==0) leap=1; //是闰年 else leap=0; //非闰年 return leap; }