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Hi

I was going to use my previously asm routines to do EEPRM reads and writes
in my C program.

 

So I tried using the _asm directive to make a function out of them.

 

Here is the write function.

 

 

void write_EEPROM(unsigned char data_EE_data)

{

_asm 

 movlw DATA_EE_ADDR_H                           //Address to be written to

 movwf EEADRH   

 movlw DATA_EE_ADDR_L 

 movwf EEADR                                          

 movf data_EE_data,W                              //Data to be written to
EEPROM

 movwf EEDATA                                       

 bcf   EECON1, EEPGD

 bcf   EECON1, CFGS

 bsf   EECON1, WREN

 bcf   INTCON,  GIE

 movlw 0x55

 movwf EECON2                                       

 movlw 0xAA

 movwf EECON2

 bsf   EECON1, WR

 bsf   INTCON, GIE

 bcf   EECON1,WREN

_endasm

 

}

 

The C18 compiler is whinging that it can't find these literals.

 

Error [1111] undefined label 'WR' in 'write_EEPROM'

Error [1111] undefined label 'GIE' in 'write_EEPROM'

Error [1111] undefined label 'WREN' in 'write_EEPROM'

Error [1111] undefined label 'CFGS' in 'write_EEPROM'

Error [1111] undefined label 'EEPGD' in 'write_EEPROM'

Error [1111] undefined label 'W' in 'write_EEPROM'

 

 I looked in the header (p18f6520.h) and they are all defined in there.

 

 

Can any one tell me how to make the inline asm code see the literals in the
h file?

 

 

 

 

 

 

Phillip

Things should be as simple as possible but no simpler

 

 

 

Phillip Coiner

CTO, GPS Source, Inc.

 

 

Your source for quality GNSS Networking Solutions and Design Services, Now!

 


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