[SOLVED] My EEPROM read function does not work on 16F876A internal EEPROM?

hamed8419215 · Apr 18, 2011

Hi to all (Salam)
I want to read from internal EEPROM of a PIC16F876A.
I wrote a function for read and also a function to write.
The write function works fine but the read function does not work.
these are my functions (In mikroC PRO):

//---------Read EEPROM--------//
char ReadEEPROM(char EEReadAddress)
{
EEADR=EEReadAddress;
EEPGD_bit=0;
RD_bit=0;
asm nop;
return(EEDATA);
}
//--------Write EEPROM--------//
void WriteEEPROM(char EEWriteAddress, char EEPROMData)
{
EEADR=EEWriteAddress;
EEDATA=EEPROMData;
EEPGD_bit=0;
WREN_bit=1;
EECON2=0x55;
EECON2=0xAA;
WR_bit=1;
WREN_bit=0;
while(WR_bit)
{
asm nop;
}
}

I wrote these function just like PIC16F87xA data sheet.
I also debug it with Proteus. in read function EEADR always filled with 0xA1 not with EEReadAddress.:?

btbass · Apr 18, 2011

The RD bit should be set to initiate the read.

hamed8419215 · Apr 18, 2011

Opps! a little bug with big bad result!
I change my code. read function also works fine, but in Proteus EEADR always have 0xA1?
(Thank you very much).

---------- Post added at 18:00 ---------- Previous post was at 17:54 ----------

My problem solved totally.
thanks a lot.

[SOLVED] My EEPROM read function does not work on 16F876A internal EEPROM?

hamed8419215

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btbass

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hamed8419215

hamed8419215

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[SOLVED] My EEPROM read function does not work on 16F876A internal EEPROM?

hamed8419215

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