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constant arrays of strings

 
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Diogo Melo



Joined: 04 Aug 2008
Posts: 4
Location: ISEL,Lisbon, Portugal

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constant arrays of strings
PostPosted: Mon Aug 04, 2008 11:03 pm     Reply with quote
hi, i'm trying to get this to work in v4.057:
Code:
const char source[4][25]=      {"Note                    "
               ,"Velocity                "
               ,"Aftertouch              "
               ,"Control Change          "
               };
char bufferStr2[25];


pnt=source[currentPos]; //currentPos is a char type variable
memmove(bufferStr2,pnt,25);   



and all i get in bufferStr2 is nothing good: just random "trash" from the PICs memory banks.

This actually works if i remove the const from the array.

i've also tried to follow the second example from this page but i get the same errors :http://www.ccsinfo.com/content.php?page=flexconst. and i also tried every hint i could find in this forum.

Could anyone give me a hand.

Thanks

Diogo
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Aug 05, 2008 12:57 am     Reply with quote
The program shown below has the following output:
Quote:

Note
Velocity
Aftertouch
Control Change


Code:
#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

const char source[4][25]= {
"Note                    ",
"Velocity                ",
"Aftertouch              ",
"Control Change          "
};

//=========================
void main()
{
char *ptr;
char bufferStr2[25];
int8 i;

for(i = 0; i < 4; i++)
   {
    strcpy(bufferStr2, source[i]);   
    printf("%s \n\r", bufferStr2);
   }

while (1);
}
Diogo Melo



Joined: 04 Aug 2008
Posts: 4
Location: ISEL,Lisbon, Portugal

View user's profile Send private message

PostPosted: Tue Aug 05, 2008 2:19 pm     Reply with quote
PCM programmer wrote:
The program shown below has the following output:
Quote:

Note
Velocity
Aftertouch
Control Change


Code:
#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

const char source[4][25]= {
"Note                    ",
"Velocity                ",
"Aftertouch              ",
"Control Change          "
};

//=========================
void main()
{
char *ptr;
char bufferStr2[25];
int8 i;

for(i = 0; i < 4; i++)
   {
    strcpy(bufferStr2, source[i]);   
    printf("%s \n\r", bufferStr2);
   }

while (1);
}


thanks! apparently i shouldn't have been using the memmove() function. I started using it when i had some troubles with strcpy() when i was using an older version of the compiler.

an unrelated thing: do you know if the compiler has somekind of problem with an array of structures? i keep getting an error in the mplab watch window: Unsupported Struct. do you know anything about it?

thanks again.

diogo
ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

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PostPosted: Tue Aug 05, 2008 5:35 pm     Reply with quote
The release note for 4.076 says:
Quote:
4.076 The COFF file format has been modified to allow MPLAB to read complex structures
This indicates the object file in earlier versions had some limitations...
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