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Discussion Groups | LPC2000 | UART1 - lpc2106

Discussion group dedicated to the Philips LPC2000 family of ARM MCUs

UART1 - lpc2106 - vidya_srinivas2000 - Nov 28 23:31:00 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

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Re: [lpc2100] UART1 - lpc2106 - Leon Heller - Nov 29 4:41:00 2003

----- 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

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Re: UART1 - lpc2106 - leon_heller - Nov 29 5:58:00 2003

--- 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

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Re: [lpc2100] Re: UART1 - lpc2106 - vidya srinivasan - Nov 30 22:55:00 2003

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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Re: [lpc2100] Re: UART1 - lpc2106 - Leon Heller - Nov 30 23:38:00 2003

----- 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://www.geocities.com/leon_heller

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