24C64子程序

24C64子程序

/*24C64子程序 */
bit?? I2C_Start(void);
void? I2C_Stop(void);
void? I2C_Ack(void);
void? I2C_Nack(void);
bit?? I2C_Send_Byte( uchar);
uchar I2C_Receive_Byte(void);
void? AT24C64_R(void *mcu_address,uint AT24C64_address,uint count);
void? AT24C64_W(void *mcu_address,uint AT24C64_address,uint count);
void? Delay_10_uS(void)
{
?char i=10;
?while(i--);
}
void Delay_N_mS( uint n_milisecond)? /* n mS delay */
{
?uchar i;
?while(n_milisecond--)
?{
? i=37;
? while(i--);
?}
}
bit I2C_Start(void)
{
?Delay_10_uS();
?I2C_SDA =1;
?Delay_10_uS();
?I2C_SCK =1;
?Delay_10_uS();
?if ( I2C_SDA == 0) return 0;
?if ( I2C_SCK == 0) return 0;
?I2C_SDA = 0;
?Delay_10_uS();
?I2C_SCK = 0;
?Delay_10_uS();
?return 1;
}
void? I2C_Stop(void)
{
?Delay_10_uS();
?I2C_SDA = 0;
?Delay_10_uS();
?I2C_SCK = 1;
?Delay_10_uS();
?I2C_SDA = 1;
?Delay_10_uS();
}
void I2C_Ack(void)
{
?Delay_10_uS();
?I2C_SDA=0;
?Delay_10_uS();
?I2C_SCK=1;
?Delay_10_uS();
?I2C_SCK=0;
?Delay_10_uS();
}
void I2C_Nack(void)
{
?Delay_10_uS();
?I2C_SDA=1;
?Delay_10_uS();
?I2C_SCK=1;
?Delay_10_uS();
?I2C_SCK=0;
?Delay_10_uS();
}
bit I2C_Send_Byte( uchar d)
{
?uchar i = 8;
?bit bit_ack;
?while( i-- )
?{
? Delay_10_uS();
? if ( d &0x80 )?? I2C_SDA =1;
? else???????????? I2C_SDA =0;
? Delay_10_uS();
? I2C_SCK = 1;
? Delay_10_uS();
? I2C_SCK = 0;
? d = d << 1;
?}
?Delay_10_uS();
?I2C_SDA = 1;
?Delay_10_uS();
?I2C_SCK = 1;
?Delay_10_uS();
?bit_ack = I2C_SDA;
?I2C_SCK =0;
?Delay_10_uS();
?return bit_ack;
}
uchar I2C_Receive_Byte(void)
{
?uchar i = 8, d;
?Delay_10_uS();
?I2C_SDA = 1;
?while ( i--)
?{
? d = d << 1;
? Delay_10_uS();
? I2C_SCK =1;
? if ( I2C_SDA ) d++;
? Delay_10_uS();
? I2C_SCK =0;
?}
?return d;
}
void AT24C64_W(void *mcu_address,uint AT24C64_address,uint count)
{
?DOG_WDI=!DOG_WDI;
?DOGTIME=0;
?while(count--)
?{
? I2C_Start();
? /*I2C_Send_Byte( 0xa0 + AT24C64_address /256 *2);*/? /* 24C16? USE */
? I2C_Send_Byte( 0xa0 );
? I2C_Send_Byte(? AT24C64_address/256 );
? I2C_Send_Byte( AT24C64_address %256 );
? I2C_Send_Byte( *(uchar*)mcu_address );
? I2C_Stop();
? Delay_N_mS(10);?????? /* waiting for write cycle to be completed */
? ((uchar*)mcu_address)++;
? AT24C64_address++;
?}
}
void AT24C64_R(void *mcu_address,uint AT24C64_address,uint count)
{
?DOG_WDI=!DOG_WDI;
?DOGTIME=0;
?while(count--)
?{
? I2C_Start();
? /*I2C_Send_Byte( 0xa0 + AT24C64_address / 256 *2 );*/?? /* 24C16 USE */
? I2C_Send_Byte( 0xa0 );
? I2C_Send_Byte( AT24C64_address/256 );
? I2C_Send_Byte( AT24C64_address % 256 );
? I2C_Start();
? /*I2C_Send_Byte( 0xa1 + AT24C64_address /256 *2 );*/
? I2C_Send_Byte( 0xa1 );
? *(uchar*)mcu_address = I2C_Receive_Byte();
? I2C_Nack();
? I2C_Stop();
? ((uchar*)mcu_address)++;
? AT24C64_address++;
?}
}

24c32/24c64中文資料