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...............................PCF8563測(cè)試程序主函數(shù)............................
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#include
#include "pcf8563.h"
#include "IIC.h"
__CONFIG(FOSC_INTOSC&WDTE_OFF&MCLRE_OFF); //PIC配置位設(shè)置
void init_fosc() //PIC內(nèi)部晶振設(shè)置
{
OSCCON=0x61;
}
...................在PCF8563.h頭文件里定義的結(jié)構(gòu)體.....................
struct Time
{
uchar second;
uchar minute;
uchar hour;
uchar day;
uchar week;
uchar month;
uchar year;
};
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struct Time time;
void main()
{
init_fosc();
time.second=55;
time.minute=51;
time.hour=11;
time.day=2;
time.week=6;
time.month=4;
time.year=14;
P8563_Set_Time(); //PCF8563設(shè)置時(shí)間子函數(shù)
nop();nop();
while(1)
{
P8563_Read_Time();//讀取PCF8563子程序
TRISB=0b00000000;
PORTB=~time.second;
uint n;
for(n=0;n<600;n++)
{
nop();
}
}
while(1);
}
...............................IIC通訊子程序.................................
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#include
#include "IIC.h"
void start() //IIC起始程序
{
TRISC5=0; //SCL輸出
TRISC4=0; //SDA輸出
SDA_OUT=1;
SCL_OUT=1;
nop();
SDA_OUT=0;
nop(); //大于4us
SCL_OUT=0;
}
void stop() //IIC停止子程序
{
TRISC5=0;
TRISC4=0;
SDA_OUT=0;
SCL_OUT=1;
nop(); //大于4us
SDA_OUT=1;
TRISC4 = 1; // 結(jié)束后釋放總線(xiàn)，sda輸入
}
uchar IIC_Get_Ack(void) //檢測(cè)應(yīng)答信號(hào)
{
TRISC4=1; //應(yīng)答信號(hào)由從機(jī)發(fā)出，所以SDA設(shè)為輸入
SCL_OUT=0;
SCL_OUT=1;
nop();
if(SDA_IN==1) //讀取SDA狀態(tài)時(shí)，SCL保持高電平
{
ACK=1;
}
else
{
ACK=0;
}
SCL_OUT=0;
return (ACK);
}
void IIC_Ack() //主機(jī)向從機(jī)應(yīng)答，發(fā)送繼續(xù)信號(hào)
{
TRISC4=0;
TRISC5=0;
SDA_OUT=0;
SCL_OUT=0;
SCL_OUT=1;
nop(); //大于4us
SCL_OUT=0;
SDA_OUT=1;
}
void IIC_NOAck() //主機(jī)向從機(jī)非應(yīng)答，停止繼續(xù)讀取
{
TRISC4=0;
TRISC5=0;
SDA_OUT=1;
SCL_OUT=0;
SCL_OUT=1;
nop();
SCL_OUT=0;
SDA_OUT=0;
}
void IIC_Write_Byte(uchar dat) //發(fā)送一個(gè)字節(jié)
{
uchar bitcount=8;
do
{
TRISC4=0;
TRISC5=0;
if((dat&0x80)==0x80) //dat最高位為1，SDA拉高；dat最高位為0，SDA拉低
{
SDA_OUT=1;
}
else
{
SDA_OUT=0;
}
SCL_OUT=0;
SCL_OUT=1;
nop();
SCL_OUT=0; //SCL為低電平時(shí)，允許SDA電平變化
dat=dat<<1;
bitcount--;
}while(bitcount);
TRISC4=1;
nop();nop();
}
uchar IIC_Read_Byte() //接受一個(gè)字節(jié)
{
uchar temp1=0;
uchar bitcount1=8;
TRISC4=1; //SDA設(shè)置為輸入
TRISC5=0;
do
{
SCL_OUT=0;
SCL_OUT=1;
nop();
if(SDA_IN)
{
temp1=temp1|0x01; //如果SDA為1，則置高temp1最低位
}
else
{
temp1=temp1&0xfe; //如果SDA為0，則置低temp1最低位
}
SCL_OUT=0;
if(bitcount1-1)
{
temp1=temp1<<1;
}
bitcount1--;
}while(bitcount1);
return (temp1);
}
................................PCF8563子程序.......................................
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#include
#include "PCF8563.h"
#include "IIC.h"
struct DownCounter dcounter;
struct Time time;
uchar Val2BCD(uchar x) //十進(jìn)制轉(zhuǎn)BCD碼子程序
{
return ((x/10)<<4)+((x)&0x0F);
}
uchar PCF8563_Write_Bytes(uchar addr,uchar length,uchar *pbuf) //寫(xiě)入子程序
{
uchar send_da;
uchar i=0;
start();
IIC_Write_Byte(0xA2); //器件地址
do
{;
}while(IIC_Get_Ack());
IIC_Write_Byte(0x02); //器件讀取起始位
do
{;
}while(IIC_Get_Ack());
for(i=0;i
{
send_da=*(pbuf++);
IIC_Write_Byte(send_da);
do
{;
}while(IIC_Get_Ack());
}
stop();
nop();nop();
}
uchar PCF8563_Read_Bytes(uchar addr,uchar length,uchar *pbuf) //PCF8563讀取子程序
{
uint receive_da;
uchar i=0;
start();
IIC_Write_Byte(0xa2); //器件地址
do
{;
}while(IIC_Get_Ack());
IIC_Write_Byte(0x02); //最小地址
do
{;
}while(IIC_Get_Ack());
start();
IIC_Write_Byte(0xa3); //器件讀取地址
do
{;
}while(IIC_Get_Ack());
TRISC4=0;
while(length--)
{
receive_da=IIC_Read_Byte();
*(pbuf++)=receive_da;
IIC_Ack();
}
IIC_NOAck();
stop();
nop();nop();nop();nop();nop();nop();
return pbuf[i];
}
uchar P8563_Read_Time() //PCF8563讀取時(shí)間子程序
{
uchar temp[7];
PCF8563_Read_Bytes(0x02,0x07,temp);
time.second=BCD2Val(temp[0]&0x7f);
time.minute=BCD2Val(temp[1]&0x7f);
time.hour=BCD2Val(temp[2]&0x1f);
time.day=BCD2Val(temp[3]&0x3f);
time.week=BCD2Val(temp[4]&0x07);
time.month=BCD2Val(temp[5]&0x1f);
time.year=BCD2Val(temp[6]);
return 0;
}
uchar BCD2Val(uchar x) //BCD轉(zhuǎn)十進(jìn)制
{
return ((x>>4)&0x0f)*10+(x&0x0f);
}
uchar P8563_Set_Time() //PCF8563設(shè)置時(shí)間子程序
{
uchar temp[7];
uchar i;
for(i=0;i<7;i++)
{
temp[i]=Val2BCD(((uchar *)(&time))[i]);
}
return PCF8563_Write_Bytes(0x02,7,temp);
}
uchar P8563_Set_DownCounter()
{
return PCF8563_Write_Bytes(0x0e,2,(uchar *)&dcounter);
}
uchar P8563_Read_DownCounter()
{
return PCF8563_Read_Bytes(0x0e,2,(uchar *)&dcounter);
}
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