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Richi Guest
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Problems with constants |
Posted: Thu Jul 20, 2006 3:14 pm |
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Iīm using a PIC16F877, so I have to split the Functions. But now I canīt put my Constants and the programm in one function. I tried this code, but it doesnīt work:
Main.c file:
Hauptmenu_A();
Hauptmenu_A.c file:
int Konstanten_Hauptmenu (int x)
{
BYTE CONST Konstanten_Hauptmenu_A [64] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x10,0x20,0x60,0xC0,0xC0,0x80,0x80,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x30,0x30,0x30,0x30,0x30,0x30,
0x30,0xF0,0xE0,0x00,0xF0,0xF0,0x00,0x00,
0x00,0x00,0x00,0xF0,0xF0,0x00,0xE0,0xF0};
return(Konstanten_Hauptmenu_A[x]);
}
void Hauptmenu_A (void)
{
for (x = 0; x < 63; ++x)
{
Write_Display_Data (Konstanten_Hauptmenu_A[x]);
m = Konstanten_Hauptmenu_A[x];
}
}
.... m is always a random number... any Ideas? |
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rwyoung
Joined: 12 Nov 2003 Posts: 563 Location: Lawrence, KS USA
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Posted: Thu Jul 20, 2006 3:38 pm |
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Consider two arrays of 32 each.
Code: |
const int8 A[] = { /*put first 32 values here*/};
const int8 B[] = { /*put second 32 values here*/};
int Konstanten_Hauptmenu(int x)
{
if (x>31)
return(B[x]);
else
return(A[x]);
}
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Maybe not the prettiest but might work. _________________ Rob Young
The Screw-Up Fairy may just visit you but he has crashed on my couch for the last month! |
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PCM programmer
Joined: 06 Sep 2003 Posts: 21708
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Posted: Thu Jul 20, 2006 3:43 pm |
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I made the test program, shown below. It works.
It displays the following:
Quote: |
0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 20 60 C0 C0 80 80 00 00 00 etc.
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I tested this with PCM vs. 3.249.
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)
int Konstanten_Hauptmenu (int x)
{
BYTE CONST Konstanten_Hauptmenu_A [64] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x10,0x20,0x60,0xC0,0xC0,0x80,0x80,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x30,0x30,0x30,0x30,0x30,0x30,
0x30,0xF0,0xE0,0x00,0xF0,0xF0,0x00,0x00,
0x00,0x00,0x00,0xF0,0xF0,0x00,0xE0,0xF0};
return(Konstanten_Hauptmenu_A[x]);
}
void Hauptmenu_A (void)
{
int8 x;
int8 m;
for(x = 0; x < 63; ++x)
{
//Write_Display_Data (Konstanten_Hauptmenu_A[x]);
m = Konstanten_Hauptmenu(x);
printf("%X ", m);
}
}
//=================================
main()
{
Hauptmenu_A();
while(1);
} |
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Richi Guest
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Posted: Thu Jul 20, 2006 11:32 pm |
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Thanks a lot PCM, found the error this morning: I declared the constants not global but in a subroutine local.... |
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