main.c

I2c实现对AT24C16写入1至8的ASCII码

#include "reg52.h"
#include "i2c.h"

typedef unsigned char BYTE;
typedef unsigned int  WORD;

sbit SMG_EN1=P1^3;
sbit SMG_EN2=P1^2;
sbit SMG_EN3=P1^1;
sbit SMG_EN4=P1^0;
#define SMG_DATA    P0
// 字形表, 为0亮
//          a_
//         f|_|b
//         e|_|c .p
//           d
//        00001101
//                                 0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
unsigned char code SMG_TABLE[16]={0x3f,0xf9,0xc4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
/*          Function                */
void Delay_10us(WORD n);
void SMG_Display(BYTE SMGNum, BYTE tdata);

void main(void)
{
        BYTE rdata;

        rdata=0;

        I2C_WriteEEPROM_OneByte(0xA0,0,1);  //1
        I2C_WriteEEPROM_OneByte(0xA0,1,3);  //  3
        I2C_WriteEEPROM_OneByte(0xA0,2,5);  // 5
        I2C_WriteEEPROM_OneByte(0xA0,3,7);  // 7

        while(1)
        {
                rdata=I2C_ReadEEPROM_OneByte(0xA0,0);
                SMG_Display(1,rdata);
                rdata=I2C_ReadEEPROM_OneByte(0xA0,1);
                SMG_Display(2,rdata);
                rdata=I2C_ReadEEPROM_OneByte(0xA0,2);
                SMG_Display(3,rdata);
                rdata=I2C_ReadEEPROM_OneByte(0xA0,3);
                SMG_Display(4,rdata);
        }

}

// write the tdata to the SMGNum
void SMG_Display(BYTE SMGNum, BYTE tdata)
{
        switch(SMGNum)
        {
                case 1:SMG_EN1=0;break;
                case 2:SMG_EN2=0;break;
                case 3:SMG_EN3=0;break;
                case 4:SMG_EN4=0;break;
                default:break;
        }
        SMG_DATA=SMG_TABLE[tdata];
        Delay_10us(100);
        SMG_EN1=1;SMG_EN2=1;SMG_EN3=1;SMG_EN4=1;
}

// delay_ms(WORD n), default use 12M XTAL,others should be modifed.
void Delay_10us(WORD n)
{
        BYTE i=0;
        for(;n>0;n--)
                for(i=0;i<10;i++);
}