new compiler - new speed selections ?????????????

Andreas · Joined: 25 Oct 2004 Posts: 136

Hi friends,

I was working with the ver 3.222 for a long time and now I changed
to the new version 3.234 and had a bad result:

without changing NOTHING in the source codethe speed of the
RS232 port is only 1/4 of the supposed speed !!!

Anybody out therewho had the same experience ?

Any help very much appreciated

thanks
Andreas

Andreas · Joined: 25 Oct 2004 Posts: 136

Hi,

Dont ask me why, after stopping and restarting the compiler several times. after setting the delay statement to different values --
the program is working as it should !!!!!!!

BTW, what speed to I have to set in the use delay statement ?

the crystal speed or the real oscillator speed ??

e.g. Osc 6.140000 MHz

real speed 24150000

Hope somebody has a clue

best regards

Andreas

treitmey · Joined: 23 Jan 2004 Posts: 1094 Location: Appleton,WI USA

If your using a H4/PLL you will need to power cycle the pic to get the the pll to lock in.
Are/were you using H4? ? ?
The one number is NOT 4x the other ? ? ? ?
6.14 * 4 == 24.56

AND BTW #use will take the 4x speed. I have a 10MhZ cyrstal .. my #use is...
#USE DELAY(CLOCK=40000000)

Andreas · Joined: 25 Oct 2004 Posts: 136

Hello,

Yes I know that its not the x4 but someday I measured the really delay
times that�s why I made it that odd number

Can I find it somewhere in the manual ?

The compiler should know it from the fusesetting that I am using the HS PLL so it can be calculated by itself.

best regards
Andreas

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

http://www.ccsinfo.com/forum/viewtopic.php?t=23829&highlight=pll+power