Lpc2000

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