Specific Output to I/O PORT

[ernest]

Hi,

I'm quite familiar with MPLAB IDE assembly languange but I am new to CCS C-compiler. I would like to output specific logic values to the I/O ports of PIC.

Let's say I have a few binary values ranging from 0-9 respectively that I need to output to the I/O port for BCD eg. binary value of 6 equivalent to 0110 to be sent to lower nibble of PORTB (RB0 - RB3). The higher nibble of PORTB is being used for something else.

So, how can I go about doing that without affecting the higher nibble?

If I were to use the 'OUTPUT_B(0X06)' command, the whole portb will be changed thus affecting the higher nibble.


Thanks a lot.

[Haplo]

Something like this would do:

[PCM programmer]

Or, use a structure of bitfields as shown in the driver file, LCD.C.
Look at some of the functions in that file to see how they write
to the structure elements, and thus to groups of pins on Port B.
This file is in c:\Program Files\Picc\Drivers