给你写了一个，编译了一下没有问题， 运行也没问题
//********************* AT24C08 Application ******************************//
#include <pic.h>
__CONFIG(HS&WDTDIS&LVPDIS);
//__CONFIG(0x3B31);
#define uchar unsigned char
#define uint unsigned int
//LCD 1602 Port Configuration
#define E RB3 //RB3 is connected to LCD 1602 Pin_E;
#define RW RB4 //RB4 is connected to LCD 1602 Pin_RW;
#define RS RB5 //RB5 is Connected to LCD 1602 RS;
//Hardware I2C Configuration
#define SCL RC3 //AT24C08 Pin_SCL is connected to RC3;
#define SDA RC4 //AT24C08 Pin_SDA is connected to RC4;
#define I2C_PageSize 16
uchar Databuf; //define the data;
uint boot_times1, boot_times2;
void I2C_Initialize(void)
{
SSPADD=0x02; //¨o¡à?¨®=Fosc/(4*(SSPADD+1)),¡à?¨¤y?a333KHz
SSPSTAT=0X80; //2¨|¨®?¡à¨o¡á??¡ê¨o?¡ê?¨o?¨¨?|ì????¨2¡á?IIC¡á¨1??¡à¨o¡á?
SSPCON=0X28; //IIC¨a¡§D?1|?¨1¨o1?¨1,IIC?¡Â??¡¤?¨o?
SSPCON2=0; //3?¨o??¡￥SSPCON2??¡ä??¡Â
}
void Write_AT24C08(uchar WriteAddr,uchar Databuf)
{
SEN=1; //2¨2¨|¨2IIC???¡￥D?o?
while(SEN==1); //?¡à|ì????¡￥?a?1
SSPIF=0; //??SSPIF¡à¨o????
SSPBUF=0xA0; //¡¤¡é?¨aAT24C08|ì??¡Â?t|ì??¡¤o¨aD¡äD?o?
while(SSPIF==0); //?¡à|ì?¡¤¡é?¨a¨a¨o¡à??a?1
SSPIF=0; //??SSPIF¡à¨o????
SSPBUF=WriteAddr;
while(SSPIF==0); //?¡à|ì?¡¤¡é?¨a¨a¨o¡à??a?1
SSPIF=0; //??SSPIF¡à¨o????
SSPBUF=Databuf; //¡¤¡é?¨a¨oy?Y
while(SSPIF==0); //?¡à|ì?¡¤¡é?¨a¨a¨o¡à??a?1
SSPIF=0; //??SSPIF¡à¨o????
PEN=1; //2¨2¨|¨2IIC¨a¡ê?1D?o?
while(PEN==1); //?¡à|ì?¨a¡ê?1?a?1
SSPIF=0; //??SSPIF¡à¨o????
}
unsigned Read_AT24C08(uchar Addr)
{
unsigned char buf; //?¡§¨°?¨°?????¡ä??¡Â¨®?¨¤¡ä?Y¡ä??¨￠3?|ì?¨oy?Y
SEN=1; //2¨2¨|¨2IIC???¡￥D?o?
while(SEN==1); //?¡à|ì????¡￥?a?1
SSPIF=0; //??SSPIF¡à¨o????
SSPBUF=0xA0; //¡¤¡é?¨aAT24C08|ì??¡Â?t|ì??¡¤o¨aD¡äD?o?
while(SSPIF==0); //?¡à|ì?¡¤¡é?¨a¨a¨o¡à??a?1
SSPIF=0; //??SSPIF¡à¨o????
SSPBUF=Addr; //¡¤¡é?¨a|ì??¡¤
while(SSPIF==0); //?¡à|ì?¡¤¡é?¨a¨a¨o¡à??a?1
SSPIF=0; //??SSPIF¡à¨o????
RSEN=1; //2¨2¨|¨2IIC?????¡￥D?o?
while(SSPIF==0); //?¡à|ì????¡￥?a?1
SSPIF=0; //??SSPIF¡à¨o????
SSPBUF=0xA1; //¡¤¡é?¨aAT24C08|ì??¡Â?t|ì??¡¤o¨a?¨￠D?o?
while(SSPIF==0); //?¡à|ì?¡¤¡é?¨a¨a¨o¡à??a?1
SSPIF=0; //??SSPIF¡à¨o????
RCEN=1; //¨|¨¨???¨￠?¨oD¨a
while(SSPIF==0); //?¡à|ì?¡¤¡é¨a¨o?a?1
buf=SSPBUF; //?¨￠3?¨oy?Y¡¤?¨¨?buf?D?Y¡ä?
ACKDT=1; //?¡ä¨¨¡¤¨¨?¨oy?Y??
ACKEN=1; //¡¤¡é?¨a¨®|¡äeD?o?
while(SSPIF==0); //?¡à|ì?¡¤¡é?¨a¨a¨o¡à??a?1
SSPIF=0; //??SSPIF¡à¨o????
PEN=1; //2¨2¨|¨2IIC¨a¡ê?1D?o?
while(PEN==1); //?¡à|ì?¨a¡ê?1?a?1
SSPIF=0; //??SSPIF¡à¨o????
return(buf); //???¨￠3?¨oy?Y¡¤|ì??
}
void I2C_PageWrite(uchar* pBuffer, uchar WriteAddr, uint NumByteToWrite)
{
while(NumByteToWrite--)
{
/* Send the current byte */
Write_AT24C08(WriteAddr,*pBuffer);
pBuffer++;
}
}
void I2C_BufferWrite(uchar* pBuffer, uchar WriteAddr, uint NumByteToWrite)
{
uchar NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;
Addr = WriteAddr % I2C_PageSize;
count = I2C_PageSize - Addr;
NumOfPage = NumByteToWrite / I2C_PageSize;
NumOfSingle = NumByteToWrite % I2C_PageSize;
/* If WriteAddr is I2C_PageSize aligned */
if(Addr == 0)
{
/* If NumByteToWrite < I2C_PageSize */
if(NumOfPage == 0)
I2C_PageWrite(pBuffer, WriteAddr, NumOfSingle);
/* If NumByteToWrite > I2C_PageSize */
else
{
while(NumOfPage--)
{
I2C_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
WriteAddr += I2C_PageSize;
pBuffer += I2C_PageSize;
}
if(NumOfSingle!=0)
I2C_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
}
/* If WriteAddr is not I2C_PageSize aligned */
else
{
/* If NumByteToWrite < I2C_PageSize */
if(NumOfPage== 0)
I2C_PageWrite(pBuffer, WriteAddr, NumOfSingle);
/* If NumByteToWrite > I2C_PageSize */
else
{
NumByteToWrite -= count;
NumOfPage = NumByteToWrite / I2C_PageSize;
NumOfSingle = NumByteToWrite % I2C_PageSize;
if(count != 0)
{
I2C_PageWrite(pBuffer, WriteAddr, count);
WriteAddr += count;
pBuffer += count;
}
while(NumOfPage--)
{
I2C_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
WriteAddr += I2C_PageSize;
pBuffer += I2C_PageSize;
}
if(NumOfSingle != 0)
{
I2C_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
}
}
}
void Delay1602(uint t)
{
uint k;
for(k=0;k<t;k++); //?¨®¨o¡à
}
void LCD1602_busy(void)
{
TRISD7=1; //??RD7?¨2¨|¨¨???a¨o?¨¨??¨2¡ê??a?¨￠¡á?¡á?¡à?
RS=0; //RS=0?¡éRW=1?¡éE=1¨o¡à¡ê??|D?o?¨o?3?|ì?DB7¡ê?¨®¨|RD7?¨￠¨¨?
RW=1; //RS=0?¡éRW=1?¡éE=1¨o¡à¡ê??|D?o?¨o?3?|ì?DB7¡ê?¨®¨|RD7?¨￠¨¨?
E=1; //RS=0?¡éRW=1?¡éE=1¨o¡à¡ê??|D?o?¨o?3?|ì?DB7¡ê?¨®¨|RD7?¨￠¨¨?
while(RD7==1); //¨®¨|RD7?¨￠¨¨?1¡ê?¡à¨a¨o?1602¨°o?¡ì?|¡ê?D¨¨¨°a|쨨¡äy
E=0; //?¨￠¨a¨o¨°?o¨®¡ê????¡äE|ì?|ì???
TRISD7=0; //??RD7?¨2¨|¨¨???a¨o?3??¨2
}
void LCD1602_Write_com(uchar combuf)
{
RS=0; //??????¨￠???¡ä??¡Â
RW=0; //????D¡ä¡á¡ä¨¬?
PORTD=combuf; //???¨1¨￠?¡á?¨a¡§1yRD?¨2?¨a?¨￠DB
E=1; //E??|ì??????¨1¨￠?¡á?D¡ä¨¨?1602¨°o?¡ì
asm("NOP"); //¨¬¨a?¨®¨°?????2¨′¡á¡Â¡ê?¨o1??|ì????¨￠¨|¨′??3?1us
E=0; //D¡ä¨a¨o¨°?o¨®¡ê????¡äE|ì?|ì???
}
void LCD1602_Write_com_busy(uchar combuf)
{
LCD1602_busy(); //|ì¡Â¨®??|?¨¬2ao¡￥¨oy
LCD1602_Write_com(combuf); //|ì¡Â¨®??|?¨¬2ao¡￥¨oy
}
void LCD1602_Write_data_busy(uchar databuf)
{
LCD1602_busy(); //|ì¡Â¨®??|?¨¬2ao¡￥¨oy
RS=1; //????¨oy?Y??¡ä??¡Â
RW=0; //????D¡ä¡á¡ä¨¬?
PORTD=databuf; //???¨1¨￠?¡á?¨a¡§1yRD?¨2?¨a?¨￠DB
E=1; //E??|ì??????¨1¨￠?¡á?D¡ä¨¨?1602¨°o?¡ì
asm("NOP"); //¨¬¨a?¨®¨°?????2¨′¡á¡Â¡ê?¨o1??|ì????¨￠¨|¨′??3?1us
E=0; //D¡ä¨a¨o¨°?o¨®¡ê????¡äE|ì?|ì???
}
void LCD1602_Write_address(uchar x,uchar y)
{
x&=0x0f; //¨￠D|ì??¡¤?T???¨20-15??
y&=0x01; //DD|ì??¡¤?T???¨20-1??
if(y==0) //¨¨?1?¨o?|ì¨2¨°?DD
LCD1602_Write_com_busy(x|0x80); //??¨￠D|ì??¡¤D¡ä¨¨?
else //¨¨?1?¨o?|ì¨2?tDD
LCD1602_Write_com_busy((x+0x40)|0x80); //??¨￠D|ì??¡¤D¡ä¨¨?
}
void LCD1602_init(void)
{
Delay1602(1500); //|ì¡Â¨®??¨®¨o¡ào¡￥¨oy
LCD1602_Write_com(0x38); //8??¨oy?Y¡á¨1??¡ê?¨￠?DD??¨o??¡ê¨o?¡ê?5*7|ì??¨®??¨o?
Delay1602(500); //|ì¡Â¨®??¨®¨o¡ào¡￥¨oy
LCD1602_Write_com(0x38); //8??¨oy?Y¡á¨1??¡ê?¨￠?DD??¨o??¡ê¨o?¡ê?5*7|ì??¨®??¨o?
Delay1602(500); //|ì¡Â¨®??¨®¨o¡ào¡￥¨oy
LCD1602_Write_com(0x38); //8??¨oy?Y¡á¨1??¡ê?¨￠?DD??¨o??¡ê¨o?¡ê?5*7|ì??¨®??¨o?
LCD1602_Write_com_busy(0x38); //8??¨oy?Y¡á¨1??¡ê?¨￠?DD??¨o??¡ê¨o?¡ê?5*7|ì??¨®??¨o?
LCD1602_Write_com_busy(0x08); //??¨o?1|?¨11?¡ê??T1a¡à¨o
LCD1602_Write_com_busy(0x01); //???¨￠
LCD1602_Write_com_busy(0x06); //D¡ä¨¨?D?|ì?¨oy?Yo¨®¡ê?1a¡à¨o¨®¨°¨°?¡ê???¨o??¨￠2?¨°??¡￥
LCD1602_Write_com_busy(0x0C); //??¨o?1|?¨1?a¡ê??T1a¡à¨o
}
void LCD1602_Disp(uchar x,uchar y,uchar buf)
{
LCD1602_Write_address(x,y); //?¨¨??|ì??¡¤D??¡éD¡ä¨¨?
LCD1602_Write_data_busy(buf); //?¨′D¡ä¨¨?¨°a??¨o?|ì?¨oy?Y
}
void main(void) //?¡Âo¡￥¨oy,|ì￡¤???¨2?a?¨2o¨®?¨a¨o?¡ä¨®?a??o¡￥¨oy?a¨o???DD
{
TRISB=0B11000111; //3?¨o??¡￥RB7-RB0|ì?¨o?¨¨?¨o?3?¡¤??¨°
TRISC=0B11111111; //3?¨o??¡￥RC7-RC0|ì?¨o?¨¨?¨o?3?¡¤??¨°
TRISD=0B00000000; //3?¨o??¡￥RD7-RD0|ì?¨o?¨¨?¨o?3?¡¤??¨°
PORTB=0B00000000; //3?¨o??¡￥RB7-RB0|ì?¨oy?|ì
PORTC=0B00000000; //3?¨o??¡￥RC7-RC0|ì?¨oy?|ì
PORTD=0B00000000; //3?¨o??¡￥RD7-RD0|ì?¨oy?|ì
I2C_Initialize();
LCD1602_init(); //|ì¡Â¨®?1602¨°o?¡ì3?¨o??¡￥o¡￥¨oy
//***due to count the reboot times, no need to use the Pagewrite;
//if possible you could use the 16-bits to show the times,you need to uncomment
//below 8 rows
// boot_times1=Read_AT24C08(0x00); //¡ä¨®AT24C08?D|ì??¡¤0X18?¨￠¨¨?¨oy?Y
// boot_times2=Read_AT24C08(0x01); //¡ä¨®AT24C08?D|ì??¡¤0X18?¨￠¨¨?¨oy?Y
// Databuf=boot_times1*256+boot_times2;
// Databuf++; //?¨￠3?¨oy?Y+1
// boot_times1=Databuf/256;
// boot_times2=Databuf%256;
// Write_AT24C08(0x00,boot_times1); //??+1o¨®|ì?¨oy?Y¡à¡ê¡ä?|ì?0X18?D
// Write_AT24C08(0x01,boot_times2); //??+1o¨®|ì?¨oy?Y¡à¡ê¡ä?|ì?0X18?D
Databuf=Read_AT24C08(0x00); //¡ä¨®AT24C08?D|ì??¡¤0X18?¨￠¨¨?¨oy?Y
Databuf++; //?¨￠3?¨oy?Y+1
Write_AT24C08(0x00,Databuf); //??+1o¨®|ì?¨oy?Y¡à¡ê¡ä?|ì?0X18?D
LCD1602_Disp(0,0,'M');
LCD1602_Disp(1,0,'Y');
LCD1602_Disp(3,0,'M');
LCD1602_Disp(4,0,'C');
LCD1602_Disp(5,0,'U');
LCD1602_Disp(0,1,'B');
LCD1602_Disp(1,1,'O');
LCD1602_Disp(2,1,'O');
LCD1602_Disp(3,1,'T');
LCD1602_Disp(5,1,'T');
LCD1602_Disp(6,1,'I');
LCD1602_Disp(7,1,'M');
LCD1602_Disp(8,1,'E');
LCD1602_Disp(9,1,'S');
LCD1602_Disp(10,1,':');
LCD1602_Disp(12,1,Databuf/100+0x30); //??¨o?¡ã¨′??
LCD1602_Disp(13,1,(Databuf%100)/10+0x30); //??¨o?¨o???
LCD1602_Disp(14,1,Databuf%10+0x30); //??¨o?????
while(1);
} |
