Lpc2000

uwe, I can send data from pc to MCB and the other way around without 
problems. I have checked the connections some 100 times :-) and 
there should be no mistakes there.

--- In lpc2000@yahoogroups.com, "Uwe Arends" <Uwe_Arends@o...> wrote:
> Kasper,
> 
> > I have a strange problem. I have two MCB2100 boards from Keil 
where 
> > one is transmitting data out on the COM1 and the other is 
receiving 
> > data on the COM1.
> > If i put a cable between them the receiver part writes the data 
out 
> > on the attached display very fine.
> > 
> > I connect my wireless RXQ1(in transmit mode) adapter with 
attached 
> > RS232 converter to transmitting MCB2100 kits COM1.
> > 
> > In the other end I find out that the data is received fine by 
> > attaching the RXQ1(in receive mode) via an RS232 converter to at 
PC 
> > that runs Hyperterminal.
> 
> Does sending from PC to the receiving MCB work (connected by 
cable)?
> What might be happening is, that you have outputs driving each 
other.
> The PC has its RXD on pin 2, the MCB has it on pin 3 of the 9pin
> DSub.
>  
> > I should now be able to attach the recieving RXQ1 with attached 
> > RS232 converter to the MCB2100's COM1 and write received data 
out 
> > onto the display.
> >
> > Well, whenever I do that the LPC2129 freezes totally. I have to 
> > unmount the RXQ1 and reset the whole MCB2100 kit again.
> 
> Well, why it would freeze totally is a mistery in the scenario of 
> outputs driving each other, but maybe voltage regulation gets 
upset?
> I don't recall the LPC's having a brownout detector that would 
handle
> this at the moment.
> 
> Maybe this helps :o)
> 
> -uwe