help please memory problem

[Nigel Goodwin]

You've already added a short assembler routine in your C function, so why not do ALL the EEPROM write in assembler?, there's an example in the datasheet, and it seems pointless writing part of it in C and part in assembler?.

 

[Dami]

Thanks guys its working now, just labelled the memory address in hex wrong they should be 0x40 and 0x00.

later

 

[evandude]

please post up your working code, and note what compiler it is for. then other people can make use of the code if they find this thread by searching, or if someone links them to it

 

[Dami]

Here is the complete code for writing into a PIC18F4620 EEPROM using MPLAB C18 compiler

void writeDataEE (unsigned int data)
{
EEADR = 0x10;//address
EEADRH = 0x02;//address
EEDATA = data;
EECON1bits.EEPGD = 0;
EECON1bits.CFGS = 0;
EECON1bits.WREN = 1;
INTCONbits.GIE=0;
_asm
MOVLW 0x55
MOVWF EECON2,0
MOVLW 0xAA
MOVWF EECON2,0
_endasm
EECON1bits.WR=1;
while (EECON1bits.WR == 1){};
INTCONbits.GIE=1;
EECON1bits.WREN = 0;
}