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struct in struct

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hayri
Guest

struct in struct

Posted: Sun Jan 30, 2005 3:37 pm

Code:

struct
{
byte A_last;
byte B_last;
byte C_last;
byte D_last;
struct A {int1 changed; int1 pressed;};
struct B {int1 changed; int1 pressed;};
struct C {int1 changed; int1 pressed;};
struct D {int1 changed; int1 pressed;};
} Buttons;

void InitButtons()
{
buttons.A_last = 255;
buttons.B_last = 255;
buttons.C_last = 255;
buttons.D_last = 255;
buttons.A.changed = false;
buttons.A.pressed = false;
buttons.B.changed = false;
buttons.B.pressed = false;
buttons.C.changed = false;
buttons.C.pressed = false;
buttons.D.changed = false;
buttons.D.pressed = false;
}

here is InitButtons() asm code....

.................... void InitButtons()
.................... {
.................... buttons.A_last = 255;
*
0D7C: MOVLW FF
0D7E: MOVWF 74
.................... buttons.B_last = 255;
0D80: MOVWF 75
.................... buttons.C_last = 255;
0D82: MOVWF 76
.................... buttons.D_last = 255;
0D84: MOVWF 77
.................... buttons.A.changed = false;
0D86: BCF 73.0
.................... buttons.A.pressed = false;
0D88: BCF 73.1
.................... buttons.B.changed = false;
0D8A: BCF 73.0
.................... buttons.B.pressed = false;
0D8C: BCF 73.1
.................... buttons.C.changed = false;
0D8E: BCF 73.0
.................... buttons.C.pressed = false;
0D90: BCF 73.1
.................... buttons.D.changed = false;
0D92: BCF 73.0
.................... buttons.D.pressed = false;
0D94: BCF 73.1
.................... }
0D96: GOTO 1704 (RETURN)

as you can see in asm code

.................... buttons.A.changed = false;
0D86: BCF 73.0

.................... buttons.B.changed = false;
0D8A: BCF 73.0

buttons.A.changed and buttons.B.changed (and others) converted to exactly same asm code (BCF 73.0). both of code uses same memory and everything goes wrong.

i want to differend bytes, bits. (example)
buttons.A.changed = false; --> BCF 73.0
buttons.B.changed = false; --> BCF 73.2

what is i'm doing wrong?
can i use structs in another struct to get this?

thanks.

ckielstra

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

Posted: Sun Jan 30, 2005 6:15 pm

change

Code:

struct
{
byte A_last;
byte B_last;
byte C_last;
byte D_last;
struct {int1 changed; int1 pressed; A};
struct {int1 changed; int1 pressed; B};
struct {int1 changed; int1 pressed; C};
struct {int1 changed; int1 pressed; D};
} Buttons;

hayri
Guest

Posted: Mon Jan 31, 2005 2:14 pm

thanks a lot Ckielstra Smile

it is absolutely my fool...

this one also worked well. (but used different bytes for each struct - bits 70.0, 71.0 ... only for information)

Code:

typedef struct
{
int1 changed;
int1 pressed;
}btn;

struct
{
byte A_last;
byte B_last;
byte C_last;
byte D_last;
btn A;
btn B;
btn C;
btn D;
} Buttons;

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