DS1302时钟控制

2017-6-14 19:32:48 2647 DS1302 来自手机

0 #include #include #define uchar unsigned char #define uint unsigned int data_7seg[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,}; uchar hour,min,sec; *it shi=P1^0; it fen=P1^1; it miao=P1^2; it rst=P1^4; it sck=P1^5; it io=P1^6; *it fm=P1^7; /函数声明：/ void write_ds1302_byte(uchar dat); void write_ds1302(uchar add,uchar dat); uchar read_ds1302(uchar add); void read_rtc(); void set_rtc(); void display(); void delay(int n); void show(); void fmzz(); /DS1302单字节写入：/ void write_ds1302_byte(uchar dat) { uchar i; //发送地址 for(i=0;i<8;i++) //循环8次移位 { sck=0; io=dat&0x01; //每次传输低字节 dat=dat>>1; //右移一位 sck=1; } } /DS1302多字节写入：/ void write_ds1302(uchar add,uchar dat) { rst=0;//CE引脚为低，数据传送中止 _nop_(); sck=0; //清零时钟总线 _nop_(); rst=1; //CE引脚为高，逻辑控制有效 _nop_(); write_ds1302_byte(add); write_ds1302_byte(dat); rst=0; _nop_(); io=1; sck=1; } /DS1302读取：/ uchar read_ds1302(uchar add) { uchar i,value; rst=0; _nop_(); sck=0; _nop_(); rst=1; _nop_(); write_ds1302_byte(add); for (i=0;i<8;i++) { value=value>>1; sck=0; if (io) value=value\|0x80; //每次传输低字节 sck=1; } rst=0; _nop_(); sck=0; _nop_(); sck=1; io=1; return value; } /调整时间：/ void set_rtc() { 此处需关闭写保护 if (shi==0) delay(100); if (shi==0) { hour=(hour>>4)10+(hour&0x0f); hour++; if (hour==24) hour=0; hour=((hour/10)<<4)+(hour%10); write_ds1302(0x84,hour); } if (fen==0) delay(100); if (fen==0) { min=(min>>4)10+(min&0x0f); min++; if (min==60) min=0; min=((min/10)<<4)+(min%10); write_ds1302(0x82,min); } if (miao==0) delay(100); if (miao==0) { sec=(sec>>4)10+(sec&0x0f); sec++; if (sec==60) sec=0; sec=((sec/10)<<4)+(sec%10); write_ds1302(0x80,sec); } } /读取时间：/ void read_rtc() { hour=read_ds1302(0x85); min=read_ds1302(0x83); sec=read_ds1302(0x81); } /显示时间：/ void display() { unsigned int a=1; P2=0x01;P0=data_7seg[hour/16]; delay(a); P2=0x02;P0=data_7seg[hour%16]; delay(a); P2=0x04;P0=data_7seg[min/16]; delay(a); P2=0x08;P0=data_7seg[min%16]; delay(a); P2=0x10;P0=data_7seg[sec/16]; delay(a); P2=0x20;P0=data_7seg[sec%16]; delay(a); } /蜂鸣：/ void fmzz() { uint i; for (i=0;i<100;i++) { fm=!fm; delay(2); } } /延时程序：/ void delay(int n) { unsigned int i,j; for(i=0;i { for(j=0;j<121;j++) {;} } } /显示学号：/ void show() { unsigned int m; for(m=0;m<20;m++) { uint a=10; P2=0x01;P0=data_7seg[7];delay(a); P2=0x02;P0=data_7seg[2];delay(a); P2=0x04;P0=data_7seg[4];delay(a); P2=0x08;P0=data_7seg[1];delay(a); P2=0x10;P0=data_7seg[1];delay(a); P2=0x20;P0=data_7seg[8];delay(a); } } /主程序：/ void main() { show(); write_ds1302(0x84,0x12); //初始化 write_ds1302(0x82,0x00); write_ds1302(0x80,0x00); //秒寄存器（81h、80h）的位7 当该位置为0时，时钟开始运行。 while (1) { set_rtc(); read_rtc(); display(); if(min==0) { if(sec==0) { fmzz(); } } } } 1
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