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external code variable

Rakesh Kumar

Hello,

We are using PK51 for our project using code banking technique.

For this we have created 3 source files,

1. One is for common area which contains time ISR, Serial Part ISR and function which are common for anther 2 banks.
2. 2nd source file will load in bank "0"
3. 3rd source file will load in bank "1"

Now we having variable for these 3 files. We declared these variables in common source file and declared them variables as external for remaining 2 files.

We are having constant variables which are same for these 3 files. But when we compile; PK51 gives us error and it is required that we have to defined these constants variables with separate names in 3 same files.

Is there any method like "external variables" so that we can define this constant single time?

Example:

Part1.c >>> part1.h
Part2.c>>> part2.h
Part3.c >>> part3.h

Constants

Part1.h
Unsigned char code xyz = {0x01,0X02,0x03};
Part2.h
Unsigned char code pqr = {0x01,0X02,0x03};
Part2.h
Unsigned char code lmn = {0x01,0X02,0x03};

  • 0

    "Unsigned char code xyz = {0x01,0X02,0x03};"

    What is this rubbish? Post the actual code you are having trouble with and the exact error message(s) you are getting. Copy and paste from your editor, do not retype.

  • 0

    "Part1.h
    Unsigned char code xyz = {0x01,0X02,0x03};
    Part2.h
    Unsigned char code pqr = {0x01,0X02,0x03};
    Part2.h
    Unsigned char code lmn = {0x01,0X02,0x03}; "

    These look like attempts at definitions (with initialisations) - even after fixing the fundamental syntax errors, they should certainly not be in header files!
    Header files should contain only declarations

    Every symbol must have exactly one definition - you can have as many declarations for it as you like.

    Standard 'C' textbook stuff, or try a search of the forum for posts containing both "declaration" and "definition" - there's loads of 'em!

  • 0 in reply to John Donaldson

    please find attach code:



    our computer in not connected to internet.



    for you reference i set bold text for your reference.



    Thanks in advance.



    ======================= 1st file start code20.h==============================

    #ifndef __CODE20__
    #define __CODE20__

    unsigned char code date_lookup[]={31,28,31,30,31,30,31,31,30,31,30,31};
    unsigned char code ring_cad[][151]={
    {
    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},

    #endif

    ===========================================1st file code20.h end===============
    ========================2nd file lcode20.h start==========================

    #ifndef __LEXTCODE20__
    #define __LEXTCODE20__

    unsigned char code ldate_lookup[]={31,28,31,30,31,30,31,31,30,31,30,31};
    unsigned char code lring_cad[][151]={
    {
    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},

    #endif

    ===========================================2nd file lcode20.h end===============
    ========================3rd file pcode20.h start==========================
    #ifndef __PEXTCODE20__
    #define __PEXTCODE20__

    unsigned char code pdate_lookup[]={31,28,31,30,31,30,31,31,30,31,30,31};

    unsigned char code pring_cad[][151]={
    {
    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},

    #endif
    ========================3rd file pcode20.h end==========================

  • 0 in reply to Rakesh Kumar

    "please find attach code"

    so you really are defining variables in header files - this will naturally cause you problems!

    See my earlier post.