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Tackyone
Joined: 29 Mar 2009
Posts: 2
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| Initializing nested structures... |
 Posted: Sun Mar 29, 2009 4:54 pm |
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Hi,
I'm just getting to grips with the CCS PIC compiler, so please go easy on me 
I have a structure, within a structure that I'd like to initialize. Whilst the code below compiles cleanly under, say gcc - I can't get the CCS PIC compiler to compile it - it just halts with a "Expression must evaluate to a constant" error...
Any chance someone can give the code a quick look over, and see what's likely to be the problem?
Cheers
-Tacks
---
| Code: |
#include <16F819.h>
struct Values{
int8 name;
int8 value;
};
struct Pairs{
int8 option;
int8 value;
};
struct Test {
int16 my_code;
struct Pairs config[ 8 ];
struct Values current[ 8 ];
};
struct Test my_test = {
0x1234,
{
{ 0x01, 0x02 }, <--- errors at the start of this line.
{ 0x03, 0x04 },
{ 0x04, 0x05 },
{ 0x06, 0x07 }
},
{
{ 0x11, 0x12 },
{ 0x13, 0x14 },
{ 0x14, 0x15 },
{ 0x16, 0x17 }
}
};
void main(){
/* Dummy */
}
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Mar 29, 2009 5:47 pm |
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It works in vs. 4.089 and 4.090. Here's the output. The last 4 sets in
each group are zeros because your code declared an array of 8 sets,
but only the first 4 are initialized.
| Quote: |
my_test.my_code = 1234
01 02
03 04
04 05
06 07
00 00
00 00
00 00
00 00
11 12
13 14
14 15
16 17
00 00
00 00
00 00
00 00 |
The program below was tested in the MPLAB simulator, using "UART1"
(a feature of the simulator) to display the output in the Output Window.
| 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)
struct Values{
int8 name;
int8 value;
};
struct Pairs{
int8 option;
int8 value;
};
struct Test {
int16 my_code;
struct Pairs config[ 8 ];
struct Values current[ 8 ];
};
struct Test my_test = {
0x1234,
{
{ 0x01, 0x02 },
{ 0x03, 0x04 },
{ 0x04, 0x05 },
{ 0x06, 0x07 }
},
{
{ 0x11, 0x12 },
{ 0x13, 0x14 },
{ 0x14, 0x15 },
{ 0x16, 0x17 }
}
};
//==========================
void main()
{
int i;
printf("my_test.my_code = %lx \n\r", my_test.my_code);
for(i=0; i<8; i++)
printf("%x %x \r", my_test.config[i].option, my_test.config[i].value);
printf("\n\r");
for(i=0; i<8; i++)
printf("%x %x \r", my_test.current[i].name, my_test.current[i].value);
while(1);
} |
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Tackyone
Joined: 29 Mar 2009
Posts: 2
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| Posted: Mon Mar 30, 2009 3:06 am |
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Hi,
Thanks for that - I'll check what version we're running here...
Great to know it's not me going mad
Thanks,
-Tacks |
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