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bertronicom
Joined: 17 Nov 2004
Posts: 26
Location: University of Cantabria -SPAIN
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| trouble wiht pointers |
 Posted: Thu Apr 28, 2005 2:57 pm |
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I have this code not working,
int8 Decode_BT_Packet ( int *id_Network, *Cmd, *LenData, *CRC ) {
if ( Full_Length_Packet >= 6 ) {
*id_Network = 15;
*Cmd = 16;
*LenData =17;
*CRC = 18;
Ret_Val = 0x01;
}
}
when I'm debugging id_network doesn't have 15 value neither the rest of pointers.
What's happens |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Apr 28, 2005 3:26 pm |
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That's not really a test program. I can't do much with it, so I made
the test program shown below and compiled it with PCM vs. 3.224.
It works. It displays the following characters on the terminal window:
A B C
| Code: | #include <16F877.H>
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock = 4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
void my_func(int8 *ptr1, int8 *ptr2, int8 *ptr3)
{
*ptr1 = 'A';
*ptr2 = 'B';
*ptr3 = 'C';
}
//================
main()
{
char a;
char b;
char c;
a = 0;
b = 0;
c = 0;
my_func(&a, &b, &c);
printf("%c %c %c", a, b, c);
while(1);
} |
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Mark
Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA
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| Re: trouble wiht pointers |
| Posted: Thu Apr 28, 2005 3:57 pm |
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| bertronicom wrote: | I have this code not working,
int8 Decode_BT_Packet ( int *id_Network, *Cmd, *LenData, *CRC ) {
if ( Full_Length_Packet >= 6 ) {
*id_Network = 15;
*Cmd = 16;
*LenData =17;
*CRC = 18;
Ret_Val = 0x01;
}
}
when I'm debugging id_network doesn't have 15 value neither the rest of pointers.
What's happens |
And it won't! id_network is a pointer. It should have a register address. That register will contain 15. I suggest you brush up on pointers and how they work. |
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