Lpc2000

Nick,

I forgot. There should be a jumper J1 on your board. It shorts the 
diode! I have not checked the documentation (there´s no jumper on my 
board) but this might be a clue. Check my previous post if you 
haven´t already.

Anders


--- In lpc2000@yahoogroups.com, "kjellberg_anders" <akj@...> wrote:
>
> Nick,
> 
> I did not expect anything like this either...
> I had a look at the P2106 schematics and apparently it is similar 
to 
> the mt board in this respect. The same 5V zenerdiode followed by a 
> 3.3V regulator. This regulator feeds the RS232 chip, no RS232 -no 
> bootloader. Both the mt and the P schematics actually say 9VAC, 
but 
> the documentation says 6VAC 9VDC.
> 
> Good luck!
> Anders
> 
> 
> 
> --- In lpc2000@yahoogroups.com, "nma550n" <nma550n@> wrote:
> >
> > Anders,
> > 
> > I actually have the P2106 board and not the 2106mt board. I 
> > originally did not think the problem with the boot loader was 
> > anything hardware. 
> > 
> > I'm not sure if this will sort out the problem with my board, as 
> > there is no need to have the voltage as high as 12v (as far as i 
> can 
> > see).
> > I will still give this a go though.
> > 
> > You say at 9 v your Tx line is 0v. What is it at 12v?
> > Just trying to tie things together here. At work at the moment 
and 
> > can't test things till I get home.
> > 
> > Thanks for all your help.
> > 
> > Nick
> > 
> > --- In lpc2000@yahoogroups.com, "kjellberg_anders" <akj@> wrote:
> > >
> > > Nick,
> > > 
> > > I get 0V on the TX pin at 9V.
> > > It is clear from the schematic that the board won't work at 
9V. 
> I 
> > > was also a bit afraid of upping the voltage as the current 
> > increased 
> > > a lot. The trick is to start at 12V since the regulators draw 
> very 
> > > much current when fed below nominal voltage. After the 
> rectifying 
> > > bridge there is 7805(and the schematic says 12V there!). There 
> is 
> > > also a 1N4733 5V zener-diode. Thus, att 9V there's only 4V 
left 
> for 
> > > the LM1117 3.3V regulator which has a minimum voltage drop of 
> about 
> > > 1.0-1.2V minimum (4.3-4.5V in). The core may get the correct 
> > voltage 
> > > but the peripherals won't. 
> > > 
> > > Cheers
> > > /Anders
> > > 
> > > 
> > > 
> > > 
> > > 
> > > --- In lpc2000@yahoogroups.com, "nma550n" <nma550n@> wrote:
> > > >
> > > > Anders,
> > > > 
> > > > Great to hear you got your board working! I have not tried 
> upping 
> > > the 
> > > > voltage as yet, will give it a try later. The only thing 
that 
> > > stopped 
> > > > me thinking that the voltage would make any differenct was 
> that 
> > > the 
> > > > board was getting 1.8v for the core and 3.3v for the 
> peripherals. 
> > > > 
> > > > Are you saying it requires 12v for RS232?
> > > > 
> > > > Also, what is voltage on your Tx pin on the LPC2106 (at 
> default)?
> > > > Regards,
> > > > 
> > > > Nick
> > > > 
> > > > 
> > > > --- In lpc2000@yahoogroups.com, "kjellberg_anders" <akj@> 
> wrote:
> > > > >
> > > > > 
> > > > > Nick,
> > > > > 
> > > > > It actually works now! Olimex states 9VDC/6VAC for 
powering 
> the 
> > > > > board, but when I had a look at the closer look at the 
> > schematic 
> > > it 
> > > > > became obvious that it should be 12V... Let me know if 
this 
> > > solves 
> > > > > your problem as well. Otherwise I could post my LPC 
utility 
> > > > settings.
> > > > > 
> > > > > regards
> > > > > /Anders
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > --- In lpc2000@yahoogroups.com, "nma550n" <nma550n@> wrote:
> > > > > >
> > > > > > Anders,
> > > > > > 
> > > > > > You had any luck yet?
> > > > > > 
> > > > > > Cheers,
> > > > > > 
> > > > > > Nick
> > > > > > 
> > > > > > --- In lpc2000@yahoogroups.com, "kjellberg_anders" 
<akj@> 
> > > wrote:
> > > > > > >
> > > > > > > 
> > > > > > > Nick,
> > > > > > > 
> > > > > > > Thanks for letting me know about your LPC 2106 
problems. 
> > > Since 
> > > > > I'm 
> > > > > > > working from home today I do not have any other cables 
> but 
> > > I'll 
> > > > > get 
> > > > > > > back to you as soon as I have tried a different one. 
As 
> I 
> > > wrote 
> > > > > > > earlier, I have tested different baudrates and made 
sure 
> > > that 
> > > > > the 
> > > > > > > comport was correctly setup. I'll check that with a 
> scope 
> > > > > tomorrow. 
> > > > > > > 
> > > > > > > Best regards 
> > > > > > > /Anders
> > > > > > > 
> > > > > > > 
> > > > > > > -- In lpc2000@yahoogroups.com, "nma550n" <nma550n@> 
> wrote:
> > > > > > > >
> > > > > > > > Anders,
> > > > > > > > 
> > > > > > > > I am also having problems with the Philips LPC2000 
> flash 
> > > > > utility 
> > > > > > > > (olimex LPC2106), and was just about to post a 
message 
> on 
> > > > this 
> > > > > > > board 
> > > > > > > > to see if the problem lies with my development board.
> > > > > > > > I am just trying to upload the simple blink LED hex 
> file 
> > > to 
> > > > > > flash, 
> > > > > > > > and it just comes up with cannot communicate. I too 
> have 
> > > > tried 
> > > > > > > many 
> > > > > > > > different com ports, jumper settings and different 
> reset 
> > > > > > > conditions, 
> > > > > > > > to no avail. This is the first time I have tried to 
> use 
> > > this 
> > > > > > > board, 
> > > > > > > > so i have no idea if the thing works.
> > > > > > > > 
> > > > > > > > I am almost certain the problem does not lie with 
the 
> > > Philips 
> > > > > > > LPC2000 
> > > > > > > > flash utility as I have scoped out the Rx signal 
(3.3v 
> > > low, 
> > > > 0v 
> > > > > > > high) 
> > > > > > > > on the board and found it to receive data. 
> > > > > > > > However, my Tx pin on the chip is always at ground 
and 
> > > does 
> > > > > > > nothing.
> > > > > > > > 
> > > > > > > > Does anyone know if Tx should be held at 0v???
> > > > > > > > 
> > > > > > > > Not sure if this will help you Anders, but just to 
let 
> > you 
> > > > > know 
> > > > > > > your 
> > > > > > > > not alone.
> > > > > > > > 
> > > > > > > > cheers,
> > > > > > > > 
> > > > > > > > Nick
> > > > > > > > 
> > > > > > > > > --- In lpc2000@yahoogroups.com, "Anders Kjellberg" 
> > > <akj@> 
> > > > > wrote:
> > > > > > > > > >
> > > > > > > > > > Hi,
> > > > > > > > > > I'm trying to establish connection with Philips 
> Flash 
> > > > > Utility 
> > > > > > > and 
> > > > > > > > > an Olimex 2106 mt board without success. TheBSL 
> jumper 
> > > is 
> > > > > > > shorted 
> > > > > > > > > and the frequency set at 14745kHz (14.7456MHz). 
> > > Different 
> > > > > > > baudrates 
> > > > > > > > > have been tried without success. I am not sure 
about 
> > the 
> > > > > > DTR/RTS 
> > > > > > > > > settings however. Also I may be using the wrong 
> RS232 
> > > > cable. 
> > > > > > > Null 
> > > > > > > > > modem or not? I'll have to check that. I intend to 
> use 
> > > the 
> > > > > > > > > bootloader and ICCARM. Any ideas that may help?
> > > > > > > > > > 
> > > > > > > > > > Thanks in advance!
> > > > > > > > > > /Anders
> > > > > > > > > > 
> > > > > > > > > > [Non-text portions of this message have been 
> removed]
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