Definitions

[anton]

Hello again,

Please help me understand this. Looks like the compiler supports records in the definition file. But if I understand it correct, if you want to say

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LatBBits.LatB0 = 1

then this is not correct

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register volatile unsigned int LATB absolute 0x02CA; 
typedef struct tagLATBBITS {
        unsigned LATB0  :1;
        unsigned LATB1  :1;
        unsigned LATB2  :1;
        unsigned LATB3  :1;
        unsigned LATB4  :1;
        unsigned LATB5  :1;
        unsigned LATB6  :1;
        unsigned LATB7  :1;
        unsigned LATB8  :1;
        unsigned LATB9  :1;
        unsigned LATB10 :1;
        unsigned LATB11 :1;
        unsigned LATB12 :1;
        unsigned        :3;
} LATBBITS;

and must be

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register volatile unsigned int LATB absolute 0x02CA; 
typedef struct tagLATBBITS {
        unsigned LATB0  :0;
        unsigned LATB1  :1;
        unsigned LATB2  :2;
        unsigned LATB3  :3;
        unsigned LATB4  :4;
        unsigned LATB5  :5;
        unsigned LATB6  :6;
        unsigned LATB7  :7;
        unsigned LATB8  :8;
        unsigned LATB9  :9;
        unsigned LATB10 :10;
        unsigned LATB11 :11;
        unsigned LATB12 :12;
} LATBBITS;

Anton

[jpc]

If you look at the definition-files for the dsPIC-Pascal you will find the same

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// LATB: Port B Latch Register
type TLATBbits = BitField
         LATB0  :1;
         LATB1  :1;
         LATB2  :1;
         LATB3  :1;
         LATB4  :1;
         LATB5  :1;
         LATB6  :1;
         LATB7  :1;
         LATB8  :1;
         LATB9  :1;
         LATB10 :1;
         LATB11 :1;
         LATB12 :1;
         UNK    :3;
  end;

var LATB: TLATBbits; absolute $02CA;

here you find the ??? bitfield , the declaration seems to reserve a number of bits for that symbol. For the time beeing they are not accessible for us i think .

[jpc]

sorry , i should have looked better : you should take a look in the help under bit fields because that is what we are looking at here.

[anton]

Ok, I also found that button that says 'Help'. Next time I will read it first.

Thank you

Anton