hi, i once used the code below and it was working.
but i had troubles when writing or reading several addresses at a time.
when adding a delay of 40ms between two accesses to the eeprom, it worked.
tino

char EEADR_@0x09b;
char EEDATA_@0x09a;
char EECON1_@0x09c;
char EECON2_@0x09d;


void EepWrite(char addr, char data) {
// write data to eeprom

  EEADR_ = addr;
  EEDATA_ = data;
  set_bit(EECON1_,2);
  clear_bit(INTCON,7);
  EECON2_=0x55;
  EECON2_=0xaa;
  set_bit(EECON1_,1);
  set_bit(EECON1_,0); //verify
  set_bit(INTCON,7);
  clear_bit(PIR1,1);
}

char EepRead(char addr) {
//read data from eeprom

  char tmp;

  EEADR_ = addr;
  set_bit(EECON1_,0);
  tmp = EEDATA_;
  return tmp;
}






Royce Simmons <w2rbn@PRODIGY.NET>
Gesendet von: pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
22.11.02 16:08
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        An:     PICLIST@MITVMA.MIT.EDU
        Kopie:
        Thema:  [PIC]: Writing EEPROM


Hello All,

Does anyone have a code fragment showing how to write a byte to the EEPROM
in a P16F628?  I looked at page 93
in the 16F62X manual but I did not see where to set the EEADR register and
move the data to the EEDATA register.

Also is the "reqiured sequence" needed for each write?

Regards,  Royce

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