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sbit SDA=P3^2; //SDA口設(shè)置
sbit SCL=P3^3; //SCL口設(shè)置
void delay() //略微延時(shí) 6us約>4.7us
{
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
}
void iic_start() //啟動(dòng)信號(hào)
{
SDA=1;
SCL=1;
delay();
SDA=0;
delay();
SCL=0;
}
void iic_stop() //停止信號(hào)
{
SDA=0;
SCL=1;
delay();
SDA=1;
delay();
SCL=0;
}
void iic_ack() //應(yīng)答信號(hào)
{
uchar i=0;
SCL=1;
delay();
while((SDA==1)&&(i<255))
i++;
SCL=0;
delay();
}
void iic_send_byte(uchar bat) //發(fā)送數(shù)據(jù)
{
uchar i,temp;
temp=bat;
for(i=0;i<=7;i++)
{
temp=temp<<1;
SCL=0;
SDA=CY;
delay();
SCL=1;
delay();
}
SCL=0;
delay();
SDA=1;
delay();
}
uchar iic_rev() //接受數(shù)據(jù)
{
uchar temp=0,i;
SCL=0;
delay();
SDA=1;
for(i=0;i<=7;i++)
{
SCL=1;
delay();
temp=(temp<<1)|SDA;
SCL=0;
delay();
}
delay();
return temp;
}
void iic_send_add_byte(uchar add,uchar bat) //向某個(gè)地址發(fā)送某數(shù)據(jù)
{
iic_start();
iic_send_byte(0xa2);
iic_ack();
iic_send_byte(add);
iic_ack();
iic_send_byte(bat);
iic_ack();
iic_stop();
}
uchar iic_rec_add_byte(uchar add) //從某個(gè)地址讀出數(shù)據(jù)
{
uchar temp;
iic_start();
iic_send_byte(0xa2);
iic_ack();
iic_send_byte(add);
iic_ack();
iic_start();
iic_send_byte(0xa3);
iic_ack();
temp=iic_rev();
iic_stop();
return temp;
}
//-----------時(shí)間預(yù)設(shè)定值---------
void time_init()
{
iic_send_add_byte(0x02,0x50); //0秒
iic_send_add_byte(0x03,0x59); //0分鐘
iic_send_add_byte(0x04,0x23); //0小時(shí)
iic_send_add_byte(0x05,0x26); //26號(hào)
iic_send_add_byte(0x07,0x05); //5月 20世紀(jì)的
iic_send_add_byte(0x08,0x14); //2014年
}
//----------------PCF8563初始化-----------------
void pcf_init()
{
iic_send_add_byte(0x00,0x00); //啟動(dòng)時(shí)鐘
}
//----------------BCD轉(zhuǎn)10進(jìn)制-----------
uchar bcd_dec(uchar bat)
{
uchar temp1,temp2,tol;
temp1=bat&0x0f;
temp2=(bat&0xf0)>>4;
tol=temp2*10+temp1;
return tol;
}
void Delay1000ms(void) //@11.0592MHz
{
unsigned char data i, j, k;
_nop_();
_nop_();
i = 43;
j = 6;
k = 203;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
uchar sec,min,hour,dat,moom,year,sec1,min1,hour1,dat1,moom1,year1;
void main(void) {
Uart_init();
Timer0_Init();
//P3M0 = 0x0c; P3M1 = 0x0c;
iic_send_add_byte(0x00,0x20); // 關(guān)閉時(shí)鐘
Delay1000ms();
time_init(); //時(shí)鐘芯片初始時(shí)間設(shè)置
pcf_init();
Delay1000ms();
while (1) {
sec=0x7f&iic_rec_add_byte(0x02); //讀取秒
min=0x7f&iic_rec_add_byte(0x03); //讀取分鐘
hour=0x3f&iic_rec_add_byte(0x04); //讀取小時(shí)
dat=0x3f&iic_rec_add_byte(0x05); //讀取天數(shù)
moom=0x1f&iic_rec_add_byte(0x07); //讀取月
year=0xff&iic_rec_add_byte(0x08); //讀取年
sec1=bcd_dec(sec); //將讀取的BCD碼秒轉(zhuǎn)換成十進(jìn)制秒以便運(yùn)算
min1=bcd_dec(min);
hour1=bcd_dec(hour);
dat1=bcd_dec(dat);
moom1=bcd_dec(moom);
year1=bcd_dec(year);
//display_time(sec1,min1,hour1,dat1,moom1,year1); //LCD1602顯示時(shí)間
// printf("%d-%d-%d %d-%d-%d\r\n",year1,moom1,dat1,hour1,min1,sec1);
printf("%d-%d-%d\r\n",hour1,min1,sec1);
Delay1000ms();
//printf("%d-%d-%d %d-%d-%d");
}
}
執(zhí)行以上程序輸出如下
5947-15104-0
0-0-0
0-256-0
0-512-0，麻煩大佬幫忙解答一下其中原因
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