decimal to binary

[hisham.i]

I am reading the timer value and store it into an integer, but I want to put the first 4 bits of the integer value on port b, then after 1 sec I want to put the last 4 bits in portb.

How can I do this?

Thanks in advance.

[ezflyr]

Hi,

You can use 'bit masking' on the integer value to alternately look at the lower 4 bits, followed by the upper 4 bits. You would AND the original value with 0Fh to get the lower bits, and F0h to get the upper bits.

Bit shifting: http://en.wikipedia.org/wiki/Mask_%28computing%29

You don't say which PIC you are using, and whether all 8 bits of port b are available? If so, you can output the new values directly. If not, and say only 4 bits were available, the lower bits would be output directly, and the upper bits would be shifted right 4 places before being output.

John

[Ttelmah]

and of course on the PIC (available via CCS), you have the 'swap' function, which swaps the nibbles in a byte. So:

[hisham.i]

Thank you

I tried your code Ttelmah and it works correctly:)

Thanks