I2C总线上并接2片24C512程序中不懂为什么只有一片能正常使用，程序我只是在使用一片的基础上加多了读写函数，读写地址0X7 0XA6

554370111 · 发表于 2018-1-30 23:06:51

//3õê¼»ˉIIC½ó¿ú
void AT24CXX_Init(void)
{
IIC_Init();
}
//ÔúAT24CXXÖ¸¶¨μØÖ·¶á3öò»¸öêy¾Y
//ReadAddr:¿aê¼¶áêyμÄμØÖ·
//·μ»ØÖμ  :¶áμ½μÄêy¾Y
u8 AT24CXX_ReadOneByte_A1(u16 ReadAddr)
{
u8 temp=0;
  IIC_Start();
if(EE_TYPE>AT24C16)
{
IIC_Send_Byte(0XA6);       //·￠ËíD′ÃüáîA0
IIC_Wait_Ack();
IIC_Send_Byte(ReadAddr>>8);//·￠Ëí¸ßμØÖ·
}else IIC_Send_Byte(0XA6+((ReadAddr/256)<<1)); //·￠ËíÆ÷¼tμØÖ·0XA0,D′êy¾Y
IIC_Wait_Ack();
  IIC_Send_Byte(ReadAddr%256); //·￠ËíμíμØÖ·
IIC_Wait_Ack();
IIC_Start();
IIC_Send_Byte(0XA7);          //½øèë½óêÕÄ￡ê½A1
IIC_Wait_Ack();
  temp=IIC_Read_Byte(0);
  IIC_Stop();//2úéúò»¸öí￡Ö1ìõ¼t
return temp;
}
//ÔúAT24CXXÖ¸¶¨μØÖ·D′èëò»¸öêy¾Y
//WriteAddr

′èëêy¾YμÄÄ¿μÄμØÖ·
//DataToWrite:òaD′èëμÄêy¾Y
void AT24CXX_WriteOneByte_A1(u16 WriteAddr,u8 DataToWrite)
{
  IIC_Start();
if(EE_TYPE>AT24C16)
{
IIC_Send_Byte(0XA6);       //·￠ËíD′Ãüáî
IIC_Wait_Ack();
IIC_Send_Byte(WriteAddr>>8);//·￠Ëí¸ßμØÖ·
}else IIC_Send_Byte(0XA6+((WriteAddr/256)<<1)); //·￠ËíÆ÷¼tμØÖ·0XA0,D′êy¾Y
IIC_Wait_Ack();
  IIC_Send_Byte(WriteAddr%256); //·￠ËíμíμØÖ·
IIC_Wait_Ack();
IIC_Send_Byte(DataToWrite);    //·￠Ëí×Ö½ú
IIC_Wait_Ack();
  IIC_Stop();//2úéúò»¸öí￡Ö1ìõ¼t
delay_us(10*1000);
}
//----------------------------------
//ÔúAT24CXXÖ¸¶¨μØÖ·¶á3öò»¸öêy¾Y
//ReadAddr:¿aê¼¶áêyμÄμØÖ·
//·μ»ØÖμ  :¶áμ½μÄêy¾Y
u8 AT24CXX_ReadOneByte_A2(u16 ReadAddr)
{
u8 temp=0;
  IIC_Start();
if(EE_TYPE>AT24C16)
{
IIC_Send_Byte(0XA0);       //·￠ËíD′ÃüáîA0
IIC_Wait_Ack();
IIC_Send_Byte(ReadAddr>>8);//·￠Ëí¸ßμØÖ·
}else IIC_Send_Byte(0XA0+((ReadAddr/256)<<1)); //·￠ËíÆ÷¼tμØÖ·0XA0,D′êy¾Y
IIC_Wait_Ack();
  IIC_Send_Byte(ReadAddr%256); //·￠ËíμíμØÖ·
IIC_Wait_Ack();
IIC_Start();
IIC_Send_Byte(0XA1);          //½øèë½óêÕÄ￡ê½A1
IIC_Wait_Ack();
  temp=IIC_Read_Byte(0);
  IIC_Stop();//2úéúò»¸öí￡Ö1ìõ¼t
return temp;
}
//------------------------
//ÔúAT24CXXÖ¸¶¨μØÖ·D′èëò»¸öêy¾Y
//WriteAddr

′èëêy¾YμÄÄ¿μÄμØÖ·
//DataToWrite:òaD′èëμÄêy¾Y
void AT24CXX_WriteOneByte_A2(u16 WriteAddr,u8 DataToWrite)
{
  IIC_Start();
if(EE_TYPE>AT24C16)
{
IIC_Send_Byte(0XA0);       //·￠ËíD′Ãüáî
IIC_Wait_Ack();
IIC_Send_Byte(WriteAddr>>8);//·￠Ëí¸ßμØÖ·
}else IIC_Send_Byte(0XA0+((WriteAddr/256)<<1)); //·￠ËíÆ÷¼tμØÖ·0XA0,D′êy¾Y
IIC_Wait_Ack();
  IIC_Send_Byte(WriteAddr%256); //·￠ËíμíμØÖ·
IIC_Wait_Ack();
IIC_Send_Byte(DataToWrite);    //·￠Ëí×Ö½ú
IIC_Wait_Ack();
  IIC_Stop();//2úéúò»¸öí￡Ö1ìõ¼t
delay_us(10*1000);
}