[讨论] 关于IIC写入EEPROM的问题

会飞的石头人 2018-3-20 10:02 楼主

这段程序完成了利用IIC写入EEPROM的任务，先是写入IIC slave的地址，然后写入EEPROM的地址，最后写入data。但是，写入EEPROM的地址这段没看懂，照这样不能写入我要求写入的地址，实际运行中这段程序却是可以完成写入EEPROM的功能的，求大家指教下！代码如下：
void EEPROM_WRITE_WORD(Uint16 address, Uint16 data)
{
Uint16 para_temp0, para_temp1, eeprom_waitcount;
int romaddr=0;

romaddr = MDB2ROMADDR(address);
if(romaddr == -1) return;
address = (Uint16)romaddr;
eeprom_waitcount = 0;

while(eeprom_waitcount < 20)
{
      ServiceDog(); //KickDog();
      eeprom_waitcount++;

      STARTE2PROM();
      para_temp0 = 0x0a0; //;GET read ctrl byte 0xa0
      para_temp1 = EEPROM_WRITE_BYTE(para_temp0);
      if(para_temp1 == 0)
      {
         //;--->>---写地址字节
         para_temp0 = address >> 7;
         EEPROM_WRITE_BYTE(para_temp0 &0xff); //;Write Address to EEPROM

         para_temp0 = ((address << 1) &0xfe);
         EEPROM_WRITE_BYTE(para_temp0 &0xff); //;Write Address to EEPROM

         WRITEE2PROMAWORD(data); ////;Write DATA to EEPROM
         ENDE2PROM();
         gSysFaultMessage.bit.InvEEpromFault = 0; //V1.07
         sub_ErrCode_delete(234);
         return ;

      }
}
gSysFaultMessage.bit.InvEEpromFault = 1; //V1.07
error_code = ErrCode_EepromRWErr;
EepromWriteErr++;
//;--->>---写地址字节
para_temp0 = address >> 7;
EEPROM_WRITE_BYTE(para_temp0 &0xff); //;Write Address to EEPROM

para_temp0 = ((address << 1) &0xfe);
EEPROM_WRITE_BYTE(para_temp0 &0xff); //;Write Address to EEPROM
WRITEE2PROMAWORD(data); //;Write DATA to EEPROM
ENDE2PROM();
return ;
}

Uint16 EEPROM_WRITE_BYTE(Uint16 data)
{
Uint16 para_temp0, para_temp1, para_temp2, para_temp3;
para_temp0 = (data << 8) &0xff00;

for(para_temp2 = 0; para_temp2 < 1; para_temp2++)
//;OUTER LOOP COUNTER
{
      for(para_temp1 = 0; para_temp1 < 8; para_temp1++)
      //;INNER LOOP COUNTER
      {
         scl_low; //SCL=0
         DELAY_US(TLOW);

         if(para_temp0 &0x8000)
         {
            //;--->>---SDA=1 -------->>
            sda_high;
            EALLOW;
            GpioCtrlRegs.GPBDIR.bit.GPIO32 = 1; // GPIO32 = output
            EDIS;
            sda_high;
         }
         else
         {
            //;--->>---SDA=0 -------->>
            sda_low;
            EALLOW;
            GpioCtrlRegs.GPBDIR.bit.GPIO32 = 1; // GPIO32 = output
            EDIS;
            sda_low;
         }

         DELAY_US(2);

         scl_high; //SCL=1
         DELAY_US(THIGH);

         para_temp0 = para_temp0 << 1;
      }

      scl_low; //SCL=0
      DELAY_US(TFALL);

      EALLOW;
      GpioCtrlRegs.GPBDIR.bit.GPIO32 = 0; // GPIO32 = input
      EDIS;
      DELAY_US(TLOW);

      scl_high; //SCL=1
      DELAY_US(THIGH);

      para_temp3 = GpioDataRegs.GPBDAT.bit.GPIO32; //;ACK BACKUP

      scl_low; //SCL=0
      DELAY_US(TFALL);

      sda_high;
      EALLOW;
      GpioCtrlRegs.GPBDIR.bit.GPIO32 = 1; // GPIO32 = output
      EDIS;
      sda_high;
      DELAY_US(TLOW);
}
return (para_temp3);
}