I would like to control the brightness of some LEDs (directly attached =
to
a port on a PIC) thru code.  Each LED would be at full bright or dim -- =
just
2 intensities.  Here's what I thought...

Assume as some point in the code, I want to set the output to
'ooBoDDBo' where 'o' is Off, 'B' is Bright, and 'D' is Dim.

Let V1 =3D value of port for dim LED's.  In this case V1 =3D '00001100'
Let V2 =3D value of port for bright LED's.  In this case V2 =3D =
'00100010'

Then set V3 1 =3D V1 OR V2 =3D 00101110'

Now in my code, every time I come around in the main loop, I would
alternate the output between V1 and V3.  Bright LEDs would get set
all the time (both times), and dim LED's would get set only on alternate
cycles -- sort of like a pulse-width dimmer.

Perhaps I may need to have 3 cycles with V1, V1, V3 depending on=20
relative brightness level, etc.

Is this reasonable?  Is there an easier/better way to do this?  I'll be
using a 16F84 or 16F872 for this.

Thanks,
-Neil.

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