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arrays in two banks pic18

 
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Alex
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arrays in two banks pic18
PostPosted: Fri May 29, 2009 5:38 am     Reply with quote
i have 2 arrays 120 bytes each
i was having difficulties while thrying to copy array1 to array2
when i've looked in .sym file i've found that compiler puts first array in bank0 at 057-0CE and second at 0CF-146 - in bank0 and bank1
and the code that generated does not switches banks
Code:

.................... void   arrays()
.................... {
....................    int8   j;
....................    for (j=0; j<120; j++)
*
053C:  MOVLB  1
053E:  CLRF   xE9
0540:  MOVF   xE9,W
0542:  SUBLW  77
0544:  BNC   0590
....................    {
....................       array2[j] = array1[j];
0546:  CLRF   03
0548:  MOVF   xE9,W
054A:  ADDLW  CF
054C:  MOVWF  01
054E:  MOVLW  00
0550:  ADDWFC 03,F
0552:  MOVFF  03,1EB
0556:  CLRF   03
0558:  MOVF   xE9,W
055A:  ADDLW  57
055C:  MOVWF  FE9
055E:  MOVLW  00
0560:  ADDWFC 03,W
0562:  MOVWF  FEA
0564:  MOVFF  FEF,1EC
0568:  MOVFF  1EB,FEA
056C:  MOVFF  01,FE9
0570:  MOVFF  1EC,FEF
....................       if (array2[j]==0x31)
0574:  CLRF   03
0576:  MOVF   xE9,W
0578:  ADDLW  CF
057A:  MOVWF  FE9
057C:  MOVLW  00
057E:  ADDWFC 03,W
0580:  MOVWF  FEA
0582:  MOVF   FEF,W
0584:  SUBLW  31
0586:  BNZ   058C
....................          output_toggle(pin_c1);
0588:  BCF    F94.1
058A:  BTG    F8B.1
....................    }
058C:  INCF   xE9,F
058E:  BRA    0540
.................... }
0590:  MOVLB  0
0592:  GOTO   059A (RETURN)


did any one encountered this before?
i'm using pic18f45k20
compiler version 4.074

Alex.
Ttelmah
Guest
PostPosted: Fri May 29, 2009 7:10 am     Reply with quote
It doesn't have to bank switch.
It is using the indirect addressing registers.
Presumably you are aware, if you just want to copy the array contents, that a memcpy, will do this more efficiently...
What you show is legitimate. If it doesn't work, look elsewhere.

Best Wishes
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