时钟芯片DS1302的驱动程序

1 ds1302的程序，不是很简洁，占的程序空间有点长 2 3 程序： 4 5 // 6 //根据自己的接线改管脚定义 7 sbit DS1302_cs=P1^2; 8 sbit DS1302_data=P1^1; 9 sbit DS1302_clk=P1^0; 10 sbit ACC0=ACC^0; 11 sbit ACC7=ACC^7; 12 // 13 #define uchar unsigned char 14 #define uint unsigned int 15 16 uchar year,month,date,hour,minute,second,week;//定义变量 17 18 // 19 //函数声明 20 oid DS1302_init();//ds1302初始化 21 void DS1302_write(unsigned char DS1302_temp); //写入一个字节 22 uchar DS1302_read(void); //读一字节 23 void DS1302_write_time(int command,int dat);//写入second or minute or hour...... or 写入一个命令 24 uchar DS1302_read_time(int command);//读取second or minute or hour...... 25 void DS1302_readdate(); 26 void DS1302_writedate(); 27 void long_ds1302_delay() //长延时 28 void short_ds1302_delay();//短延时 29 // 30 31 32 void short_ds1302_delay() 33 { 34 uchar i; 35 for(i=0;i<5;i++); 36 } 37 38 void long_ds1302_delay() 39 { 40 uchar i; 41 for(i=0;i<25;i++); 42 } 43 44 void DS1302_write(unsigned char DS1302_temp) //写入一个字节 45 { 46 uchar i,temp; 47 long_ds1302_delay(); 48 temp=DS1302_temp; 49 for(i=0;i<8;i++) 50 { 51DS1302_data=temp&0x01; 52 short_ds1302_delay(); 53 DS1302_clk=1; 54 short_ds1302_delay(); 55 DS1302_clk=0; 56 temp=temp>>1; 57 } 58 } 59 60 unsigned char DS1302_read(void) //读一字节 61 { 62 uchar i,temp; 63 long_ds1302_delay(); 64 temp=0; 65 for(i=0;i<8;i++) 66 { 67temp=temp>>1; 68 if(DS1302_data==1) 69 temp=temp+0x80; 70 DS1302_clk=1; 71 short_ds1302_delay(); 72 DS1302_clk=0; 73 short_ds1302_delay(); 74 } 75 return temp; 76 } 77 /* 78 /写操作设置,当a=0x80时禁止写操作,a=0x00时允许 79 80 void DS1302_write_able(unsigned char a) 81 { 82 DS1302_cs=0; 83 84 DS1302_clk=0; 85 short_ds1302_delay(); 86 DS1302_cs=1; 87 DS1302_write(0x8e); 88 DS1302_data=1; 89 DS1302_write(a); 90 DS1302_cs=0; 91 short_ds1302_delay(); 92 DS1302_clk=1; 93 } 94 95 /读操作设置,当a=0x80时禁止读操作,a=0x00时允许 96 97 void DS1302_read_able(unsigned char a) 98 { 99 DS1302_cs=0;100 101 DS1302_clk=0;102 short_ds1302_delay();103 DS1302_cs=1;104 DS1302_write(0x8f);105 DS1302_data=1;106 DS1302_write(a);107 DS1302_cs=0;108 short_ds1302_delay();109 DS1302_clk=1;110 }111 */112 ////ds1302初始化113 void DS1302_init()114 {115 uchar i;116 DS1302_write_time(0x8e,0x00); //允许写操作117 118 DS1302_cs=0;119 120 DS1302_clk=0;121 short_ds1302_delay();122 DS1302_cs=1;123 DS1302_write(0x81);124 DS1302_data=1;125 i=DS1302_read();126 DS1302_cs=0;127 short_ds1302_delay();128 DS1302_clk=1;129 second=((i>>4)&0x07)*10+(i&0x0f);130 131 DS1302_clk=0;132 short_ds1302_delay();133 DS1302_cs=1;134 DS1302_write(0x80);135 DS1302_data=1;136 DS1302_write(0x7f&i);137 DS1302_cs=0;138 short_ds1302_delay();139 DS1302_clk=1; 140 141 DS1302_clk=0; //充电设置142 short_ds1302_delay();143 DS1302_cs=1;144 DS1302_write(0x90);145 DS1302_data=1;146 // DS1302_write(0xa6); //允许充电,一个二极管 4k电阻147 DS1302_write(0x00); //禁止充电148 DS1302_cs=0;149 short_ds1302_delay();150 DS1302_clk=1; 151 152 DS1302_write_time(0x8e,0x80); //禁止写操作153 }154 155 unsigned char DS1302_read_time(int command)//读取second or minute or hour......156 {157 uchar i;158 DS1302_clk=0;159 short_ds1302_delay();160 DS1302_cs=1;161 DS1302_write(command);162 DS1302_data=1;163 i=DS1302_read();164 DS1302_cs=0;165 short_ds1302_delay();166 DS1302_clk=1;167 return i;168 }169 void DS1302_readdate()170 {171 uchar i;172 DS1302_cs=0;173 174 //读取second175 i=DS1302_read_time(0x81);176 second=((i>>4)&0x07)*10+(i&0x0f);177 178 //读取分minute179 i=DS1302_read_time(0x83);180 minute=((i>>4)&0x07)*10+(i&0x0f);181 182 //读取时hour183 i=DS1302_read_time(0x85);184 hour=((i>>4)&0x03)*10+(i&0x0f);185 186 //读取日date187 i=DS1302_read_time(0x87);188 date=((i>>4)&0x03)*10+(i&0x0f);189 190 //读取月份month191 i=DS1302_read_time(0x89);192 month=((i>>4)&0x01)*10+(i&0x0f);193 194 //读取周week195 i=DS1302_read_time(0x8b);196 week=i&0x07;197 198 //读取年份year199 i=DS1302_read_time(0x8d);200 year=((i>>4)&0x0f)*10+(i&0x0f);201 }202 203 204 void DS1302_write_time(int command,int dat)//写入second or minute or hour...... or 写入一个命令205 {206 DS1302_clk=0;207 short_ds1302_delay();208 DS1302_cs=1;209 DS1302_write(command);210 DS1302_data=1;211 DS1302_write(dat);212 DS1302_cs=0;213 short_ds1302_delay();214 DS1302_clk=1;215 }216 217 void DS1302_writedate()218 {219 220 DS1302_write_time(0x8e,0x00); //允许写操作221 DS1302_cs=0; 222 DS1302_write_time(0x80,0x7f&(((second/10)<<4)+(second%10))); //写second223 DS1302_write_time(0x82,0x7f&(((minute/10)<<4)+(minute%10))); //minute 224 DS1302_write_time(0x84,0x3f&(((hour/10)<<4)+(hour%10))); //hour225 DS1302_write_time(0x86,0x3f&(((date/10)<<4)+(date%10))); //date226 DS1302_write_time(0x88,0x1f&(((month/10)<<4)+(month%10))); //month227 DS1302_write_time(0x8a,0x07&week); //week228 DS1302_write_time(0x8c,((year/10)<<4)+(year%10)); //year229 DS1302_write_time(0x8e,0x80); //禁止写操作230 }