Hi Maziar,

following both ways, but I prefer also to be compiler independent (not using a union).


#pragma cd

#include<reg51.h>

typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;

union bw {
uint w;
struct{
uchar h; // MSB first
uchar l;
}b;
};

union blw {
ulong lw;
struct{
uchar b3; // MSB first
uchar b2;
uchar b1;
uchar b0;
}b;
};

uint in_po_p1_use_union( void )
{
union bw d;
d.b.l = P0;
d.b.h = P1;
return d.w;
}

uint in_p0_p1( void )
{
return P0 | (uint)P1 * 256;
}


Peter

P.S.: Now I can preview, but I know not, how I can do source listings better readable.
I think an "insert listings" button was also helpful.