Re: UART Communication between MPC566 and a 8bit Microcontroller

Hi Joe,
         The configuration part is ok. Now I found a small fault in
this. I captured the time required for transfer/receive of each data
bits on CRO, by sending a dummy character through SCI; and this bit
trnsfer/rcving time is matching with baudrate of 9600,whereas my code
is running on 19200,i.e. exactly on double.
I have also checked the MPC566 clock frequency which is 40MHz and
crystal is running at 4MHz. The relation between SCI baud rate and
system-clock frequency as mentioned in datasheet is :
                  = fsys/(32*baudrate), whereas,
fsys is 40MHz and 
bautrate = desired baud rate of operation (19200 in mycase).

Can you please tell,why it is wroking exactly at half baudrate,though
I have configured as 19200? Is there any problem of some division
factor,that is taken care internally?

-regards
Rajesh  


 

--- In [email protected], "trailrunner23" <joep@...> wrote:
>
> Hi Rajesh,
> 
> The two UARTs must be configured with the same settings to communicate
> with each other:
> 
>  - baud rate, data bits, parity, stop bits
> 
> If you have them set up the same way, and they are not communicating,
> you must be doing something else wrong.
> 
> Joe
> 
> --- In [email protected], "Rajesh" <rajesh86us@> wrote:
> >
> > 
> >  Hi,
> >            I am using two microcontrollers, one is MPC566 with 40 MHz
> > clock,and other one is a 8 bit,running at 22.1184 MHz. I am trying for
> > (OnBoard) inter-processor UART communication,by running MPC at a
> > baudrate of 19200 and the other at 9600. 
> > The problem is, sometimes it runs and data Trasmission and Recieving
> > is ok, but sometimes it's  not.
> > I tried by configuring both with same baud rates but geting same
> problem.
> > Can anyone please suggest,how to deal with this problem?
> > 
> > -regards
> > Rajesh
> >
>






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