Nick

> 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.

unless you shorten the zener Z1, 9VDC will not be enough to make the
3.3V regulator work reliably (9V - 0.7V - 5.1V = 3.2V left for the 
regulators, while the minimum dropout voltage of the LM1117 is about
1.1V, thus requiring a minimum of 4.4V to produce 3.3V). So the minimum
DC requirement would be 4.4V + 5.1V + 0.7V = 10.3V for this constellation.
If you shorten Z1 by installing J1, 4.4V + 0.7V = 5.1V min. would be 
sufficient.

hth
-uwe

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@lpc2..., "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@lpc2..., "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@lpc2..., "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@lpc2..., "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@lpc2..., "nma550n" <nma550n@>
wrote:
> > > > >
> > > > > Anders,
> > > > > 
> > > > > You had any luck yet?
> > > > > 
> > > > > Cheers,
> > > > > 
> > > > > Nick
> > > > > 
> > > > > --- In lpc2000@lpc2..., "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@lpc2..., "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@lpc2..., "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]
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
	

Nick,

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

Anders
	--- In lpc2000@lpc2..., "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@lpc2..., "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@lpc2..., "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@lpc2..., "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@lpc2..., "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@lpc2..., "nma550n"
<nma550n@> wrote:
> > > > > >
> > > > > > Anders,
> > > > > > 
> > > > > > You had any luck yet?
> > > > > > 
> > > > > > Cheers,
> > > > > > 
> > > > > > Nick
> > > > > > 
> > > > > > --- In lpc2000@lpc2...,
"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@lpc2..., "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@lpc2...,
"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]
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
	

Anders & Uwe,

I have had the jumper installed all the time. The regulators give 1.8 
& 3.3v always.
I think this is a problem with the board. 
Can anyone confirm the voltage present on Tx.

Cheers

Nick
	--- In lpc2000@lpc2..., "kjellberg_anders" <akj@...> wrote:
>
> 
> Nick,
> 
> I forgot. There should be a jumper J1 on your board. It shorts the 
> diode! I have not checked the documentation (theres no jumper on 
my 
> board) but this might be a clue. Check my previous
post if you 
> havent already.
> 
> Anders
> 
> 
> --- In lpc2000@lpc2..., "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@lpc2..., "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@lpc2..., "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@lpc2..., "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@lpc2..., "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@lpc2..., "nma550n"
<nma550n@> 
wrote:
> > > > > > >
> > > > > > > Anders,
> > > > > > > 
> > > > > > > You had any luck yet?
> > > > > > > 
> > > > > > > Cheers,
> > > > > > > 
> > > > > > > Nick
> > > > > > > 
> > > > > > > --- In lpc2000@lpc2...,
"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@lpc2...,
"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@lpc2...,
"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]
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
	

Nick,

> Can anyone confirm the voltage present on Tx.

out of reset, the TX pin is at 'low' level on my board
with the BSL jumper installed. 
If I then issue a "read device id" command from within
the LPC200 flash utility, theres some traffic on the line
and the utility reports the part id read successfully.
TX is high afterwards.
If I then reset the board again, TX goes back to low
and the next "Read device ID" fails, leaving TX in high
state.
The next "Read device ID" then is again successful, even
if ignoring the request to reset the board.

So, if your TX stays low, no matter what you do, I guess
you have a faulty board, either controller damaged, line
shortened or transceiver damaged.
I'd inspect the soldering to see if there are some shorts,
especially the "expansion" connector, that carries TXD0
next to GND.

hth
-uwe

uwe,

Thanks man, that has helped alot. Will check it out later.

Nick

--- In lpc2000@lpc2..., "Uwe Arends" <nospam@...> wrote:
>
> Nick,
> 
> > Can anyone confirm the voltage present on Tx.
> 
> out of reset, the TX pin is at 'low' level on my board
> with the BSL jumper installed. 
> If I then issue a "read device id" command from within
> the LPC200 flash utility, theres some traffic on the line
> and the utility reports the part id read successfully.
> TX is high afterwards.
> If I then reset the board again, TX goes back to low
> and the next "Read device ID" fails, leaving TX in high
> state.
> The next "Read device ID" then is again successful, even
> if ignoring the request to reset the board.
> 
> So, if your TX stays low, no matter what you do, I guess
> you have a faulty board, either controller damaged, line
> shortened or transceiver damaged.
> I'd inspect the soldering to see if there are some shorts,
> especially the "expansion" connector, that carries TXD0
> next to GND.
> 
> hth
> -uwe
>
	

Uwe & Nick,

I have the same experience as Uwe. I would check the TX line on the 
low level side of the ST3232(pin 11). Other than that you could 
perhaps try a JTAG interface before throwing the poor board away.

Anders
	--- In lpc2000@lpc2..., "nma550n" <nma550n@...> wrote:
>
> uwe,
> 
> Thanks man, that has helped alot. Will check it out later.
> 
> Nick
> 
> --- In lpc2000@lpc2..., "Uwe Arends" <nospam@> wrote:
> >
> > Nick,
> > 
> > > Can anyone confirm the voltage present on Tx.
> > 
> > out of reset, the TX pin is at 'low' level on my board
> > with the BSL jumper installed. 
> > If I then issue a "read device id" command from within
> > the LPC200 flash utility, theres some traffic on the line
> > and the utility reports the part id read successfully.
> > TX is high afterwards.
> > If I then reset the board again, TX goes back to low
> > and the next "Read device ID" fails, leaving TX in high
> > state.
> > The next "Read device ID" then is again successful, even
> > if ignoring the request to reset the board.
> > 
> > So, if your TX stays low, no matter what you do, I guess
> > you have a faulty board, either controller damaged, line
> > shortened or transceiver damaged.
> > I'd inspect the soldering to see if there are some shorts,
> > especially the "expansion" connector, that carries TXD0
> > next to GND.
> > 
> > hth
> > -uwe
> >
>