Forums

UART1 - lpc2106

Started by vidya_srinivas2000 November 29, 2003
hello all
v have a lpc2106 board from nohau.
i was trying to use both UART0 & 1 when my board stopped working.
i was writing to UART0 and also to UART1
i am not able to download my program now with the ISP.
all the voltages seem to be right and most of all my program still
works - i.e it is transmitting on UART0 but not on UART1 -
and i have drawn this inference from it that the UART1 has gone bad
and since the DCD1 - Pin0_14 (of the UART1) has to be low to continue
with ISP i am not able to download from ISP.
if this is the case - any work arounds ?
if not please can somebody tell me the cost of the processor(not the
board)
thanks




An Engineer's Guide to the LPC2100 Series


----- Original Message -----
From: "vidya_srinivas2000" <>
To: <>
Sent: Saturday, November 29, 2003 4:31 AM
Subject: [lpc2100] UART1 - lpc2106 > hello all
> v have a lpc2106 board from nohau.
> i was trying to use both UART0 & 1 when my board stopped working.
> i was writing to UART0 and also to UART1
> i am not able to download my program now with the ISP.
> all the voltages seem to be right and most of all my program still
> works - i.e it is transmitting on UART0 but not on UART1 -
> and i have drawn this inference from it that the UART1 has gone bad
> and since the DCD1 - Pin0_14 (of the UART1) has to be low to continue
> with ISP i am not able to download from ISP.
> if this is the case - any work arounds ?
> if not please can somebody tell me the cost of the processor(not the
> board)
> thanks

I've just bought 20 pcs LPC2106 from Avnet (UK). They worked out at just
under 10 GBP each with carriage and VAT. About $16 each.

The Nohau board seems easy to damage for some reason. A client of mine
zapped the JTAG on theirs and I replaced the '2106 with a '2104, all I had
at the time. It was a bit tricky, I used ChipQuik to remove the duff chip.

Leon



--- In , "vidya_srinivas2000"
<vidya_srinivas2000@y...> wrote:
> hello all
> v have a lpc2106 board from nohau.
> i was trying to use both UART0 & 1 when my board stopped working.
> i was writing to UART0 and also to UART1
> i am not able to download my program now with the ISP.
> all the voltages seem to be right and most of all my program still
> works - i.e it is transmitting on UART0 but not on UART1 -
> and i have drawn this inference from it that the UART1 has gone bad
> and since the DCD1 - Pin0_14 (of the UART1) has to be low to continue
> with ISP i am not able to download from ISP.
> if this is the case - any work arounds ?
> if not please can somebody tell me the cost of the processor(not the
> board)
> thanks

Further to my previous post, have you checked the integrity of the
connections between the RS-232 connector and the LPC2106? You might
simply have a bad solder joint somewhere.

Leon



i guess there is no problem with connections - since it was working and suddenly stopped for some strange unknown reason :-<

leon_heller <l...@hotmail.com> wrote:
--- In l...@yahoogroups.com, "vidya_srinivas2000"
<vidya_srinivas2000@y...> wrote:
> hello all
> v have a lpc2106 board from nohau.
> i was trying to use both UART0 & 1 when my board stopped working.
> i was writing to UART0 and also to UART1
> i am not able to download my program now with the ISP.
> all the voltages seem to be right and most of all my program still
> works - i.e it is transmitting on UART0 but not on UART1 -
> and i have drawn this inference from it that the UART1 has gone bad
> and since the DCD1 - Pin0_14 (of the UART1) has to be low to continue
> with ISP i am not able to download from ISP.
> if this is the case - any work arounds ?
> if not please can somebody tell me the cost of the processor(not the
> board)
> thanks

Further to my previous post, have you checked the integrity of the
connections between the RS-232 connector and the LPC2106? You might
simply have a bad solder joint somewhere.

Leon



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----- Original Message -----
From: "vidya srinivasan" <>
To: <>
Sent: Monday, December 01, 2003 3:55 AM
Subject: Re: [lpc2100] Re: UART1 - lpc2106 > i guess there is no problem with connections - since it was working and
suddenly stopped for some strange unknown reason :-<

It would be a good idea to check, especially the LPC leads, if only to
eliminate it. It could save a lot of work and is very quick.

Leon
--
Leon Heller, G1HSM
Email:
http://webspace.webring.com/people/jl/leon_heller/