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Originally Posted by Random Dude
Hmm..
First off, for anyone who missed the original discussion on EEPROM, I suggest you go check that out.
That being said, 0xFF is the inital value of the EEPROM unless data is written to it. So your problem is with your write function.
Could you post your function calls to the EEPROM library? |
I have tried writing the following in the User_Initialization routing:
EEADR = 1;
EEADRH = 0;
EEDATA = 5;
EECON1bits.EEPGD = 0;
EECON1bits.CFGS = 0;
EECON1bits.WREN = 0;
INTCONbits.GIE = 0;
EECON2 = 0x55;
EECON2 = 0xAA;
EECON1bits.WR = 1;
INTCONbits.GIE = 1;
EECON1bits.WREN = 0;
downloaded and ran once then changed to the following:
EEADR = 1;
EEADRH = 0;
EECON1bits.EEPGD = 0;
EECON1bits.CFGS = 0;
EECON1bits.RD = 1;
printf("eeprom read address high %d, low %d, value %d\n",
(int) EEADRH, (int) EEADR, (int) EEDATA);
and the value printed is 255
Dave