Lpc2000

How are you controlling the TXD and RXD enables?

Charles


--- In lpc2000@yahoogroups.com, "unikum888" <xtreme@h...> wrote:
> 
> Charles, I am using the FM-RXQ1 with MAX3222 between RF-module and 
> MCB2100 kit.
> 
> --- In lpc2000@yahoogroups.com, "charlesgrenz" <charles.grenz@s...> 
> wrote:
> > 
> > Are you using the RF600T, TRXQ1 or FM-RXQ1? Also how do you have it
> > wired in if you are not using the RF600T?
> > 
> > Charles
> > 
> > 
> > --- In lpc2000@yahoogroups.com, "unikum888" <xtreme@h...> wrote:
> > > 
> > > 9600Baud
> > > 
> > > --- In lpc2000@yahoogroups.com, "charlesgrenz" 
> <charles.grenz@s...> 
> > > wrote:
> > > > 
> > > > What's your baudrate set for on the Kiel units?
> > > > 
> > > > Charles
> > > > 
> > > > --- In lpc2000@yahoogroups.com, "unikum888" <xtreme@h...> 
> wrote:
> > > > > 
> > > > > 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