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hex values

Nir boh

hello
my question is that i want 16 Byte hex address by combining to 8 byte hex values as follows:

unsigned long addr;
unsigned char buf[3];

buf[0]=0x81;  // msb
buf[1]=0x23;  // lsb
...
printf("%lx", &addr);   //output: addr = 0x8123


i want to retrieve from this array one hex address
into 'addr' variable.
my output is: addr = 0x8123.

thanks in advance

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  • 0 in reply to Nir boh 

    unsigned char buf[4];
unsigned long addr;
union split {unsigned int word;
   struct {unsigned char hi;unsigned char lo;} bytes;};
union split newcount;

buf[0] = 0x81;
buf[1] = 0x23;

newcount.bytes.hi = buf[0];
newcount.bytes.lo = buf[1];
addr = newcount.word;     // output: addr = 0x8123

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  • 0 in reply to Nir boh 

    unsigned char buf[4];
unsigned long addr;
union split {unsigned int word;
   struct {unsigned char hi;unsigned char lo;} bytes;};
union split newcount;

buf[0] = 0x81;
buf[1] = 0x23;

newcount.bytes.hi = buf[0];
newcount.bytes.lo = buf[1];
addr = newcount.word;     // output: addr = 0x8123

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