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Passing string with variable length to function

 
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Georg Prinz



Joined: 07 Jan 2004
Posts: 22
Location: Frankfurt, Germany

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Passing string with variable length to function
PostPosted: Mon Mar 07, 2005 3:38 pm     Reply with quote

Hi folks,
does anybody have an idea why following code cannot pass a string to a function (i use PCW 3.212 and a 18Pic252 chip):

void LCDstr(char *strptr)
{
char pi, ch, punto[22];

pi = 0;
for(pi=0;strptr[pi];pi++) punto[pi]=strptr[pi]);
.......
}

......

void main(void)
{
.......

LCDstr("Hi CCS Forum");

......
}

The array punto[pi] receives garbage only!!!javascript:emoticon('Evil or Very Mad').

Thank you for for help in advance.

Saludos

Jorge



Evil or Very Mad
_________________
dl 2 kp
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Mar 07, 2005 3:53 pm     Reply with quote

The CCS compiler can't use pointers to strings in ROM.
To get a pointer to the string, you have to copy it into
a RAM buffer, and then use the pointer to the RAM buffer.
See the changes to your program, shown in bold below:

char string[50];
void main(void)
{


strcpy(string, "Hi CCS Forum");
LCDstr(string);

......
}
Georg Prinz



Joined: 07 Jan 2004
Posts: 22
Location: Frankfurt, Germany

View user's profile Send private message Send e-mail

Variable string to function
PostPosted: Tue Mar 08, 2005 3:05 am     Reply with quote

javascript:emoticon('Rolling Eyes')
Rolling Eyes
What a pity!
Gracias for the quick answer.

Saludos

Jorge
_________________
dl 2 kp
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