STC89单片机驱动DS12C887的代码,以及请教如何用STC12驱动 -

#include <reg52.h>
#include <stdio.h>
typedef unsigned int u16;
typedef unsigned char u8;
u8 year, month, date, hour, minute, second, week_day;
u8 alarm_hour, alarm_minute, alarm_second;
u8 reg_a, reg_b, reg_c;
void delay(u16 z) {
u16 x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
sbit DS12_DS = P1^0;
sbit DS12_RW = P1^1;
sbit DS12_AS = P1^2;
sbit DS12_CS = P1^4;
sbit DS12_IRQ = P3^2;
void DS12C887_write(u8 addr, u8 dat)
{
delay(1);
DS12_CS = 0; // ds12c887de 使能端 cs=0
delay(1);
DS12_AS=1;
DS12_DS=1;
DS12_RW=1;
delay(1);
P0 = addr;
delay(1);
DS12_AS=0;
DS12_RW=0;
P0 = dat;
DS12_RW=1;
DS12_AS=1;
delay(1);
DS12_CS = 1; // ds12c887de 使能端 cs=1
delay(1);
}
u8 DS12C887_read(u8 addr)
{
u8 ds_date;
DS12_AS=1;
DS12_DS=1;
DS12_RW=1;
delay(1);
DS12_CS = 0;
delay(1);
P0 = addr;
delay(1);
DS12_AS=0;
DS12_DS=0;
P0 = 0XFF;
ds_date=P0;
DS12_DS=1;
DS12_AS=1;
DS12_CS = 1;
return ds_date;
}
void DS12C887_init()
{
DS12C887_write(0x0b, 0x26);
DS12C887_write(0x0a, 0x20);
}
void main()
{
P0 = 0x00; // P0口清零
P1 = 0xff; // P1口全1
DS12C887_init();//ds12c887 初始化
EA =1; // 开启中断, 开启TIM1中断, 开启外部中断0
IT0 =1;
EX0 =1;
// 初始化UART
TMOD = 0x20;
SCON = 0x40;
TH1 = 256 - 11.0592 * 1000 * 1000 / 12 / 32 / 9600 + 0.5;
TCON |= 0x40;
SCON |= 0x02;
// 初始化UART结束
/* 初始化写入
DS12C887_write(9,11); // Year
DS12C887_write(8,8); // Month
DS12C887_write(7,7); // Date
DS12C887_write(6,7); // Week Day
DS12C887_write(4,9); // Hour
DS12C887_write(2,27); // Minute
DS12C887_write(0,25); // Second
*/
while(1) {
second = DS12C887_read(0x00);
alarm_second = DS12C887_read(0x01);
minute = DS12C887_read(0x02);
alarm_minute = DS12C887_read(0x03);
hour = DS12C887_read(0x04);
alarm_hour = DS12C887_read(0x05);
date = DS12C887_read(0x07);
month = DS12C887_read(0x08);
year = DS12C887_read(0x09);
reg_a = DS12C887_read(0x0a);
reg_b = DS12C887_read(0x0b);
reg_c = DS12C887_read(0x0c);
printf("%bX-%bX-%bX ", reg_a, reg_b, reg_c);
printf("%bX-%bX-%bX ", year, month, date);
printf("%bX:%bX:%bX\r\n", hour, minute, second);
}
}
void exter() interrupt 0
{
// 这里处理中断
}

复制代码