LPC21xx JTAG Specification?

Started by Peter Jakacki in LPC200013 years ago 26 replies

I have been doing some JTAG access of an MSP430 from the LPC2148 and I was wondering if there is a document which details the JTAG operation of...

I have been doing some JTAG access of an MSP430 from the LPC2148 and I was wondering if there is a document which details the JTAG operation of the LPC21xx? The MSP430 JTAG is explained clearly in http://www-s.ti.com/sc/psheets/slaa149b/slaa149b.pdf Does the LPC21xx have an equivalent document at all? *Peter*


RTCK signal wiggler jtag

Started by naderus2000 in LPC200013 years ago

i want to use RTCK signal for make the LPC2148 go to Debug mode when i run H-Jtag server(when press run debug in IAR) and goes high or tristate...

i want to use RTCK signal for make the LPC2148 go to Debug mode when i run H-Jtag server(when press run debug in IAR) and goes high or tristate when exit from debug mode so i can use the PORT1 for general IO when i don't use JTAG. but i didn't find any wiggler jtag schematic support this pin. so i want to know what of jtag pin should i connect to RTCK(pin11) to do this function.i want to do...


Olimex ARM-JTAG not working on laptop

Started by "tushar.0211" in LPC20009 years ago 3 replies

Hi all, I bought a Olimex board LPC2378 STK and also Olimex ARM-JTAG(wiggler type) and now not able to establish connection of the JTAG with my...

Hi all, I bought a Olimex board LPC2378 STK and also Olimex ARM-JTAG(wiggler type) and now not able to establish connection of the JTAG with my laptop which doesn't have parallel and serial port.As the JTAG is of wiggler type I am using parallel port to USB converter but still using H-JTAG server is not able to detect the hardware.Please guide me how to make this work on laptop. Thanks, Tush...


JTAG breakpoint question...

Started by bobtransformer in LPC200012 years ago

IAR EWARM 4.42a J-Link LPC2144 Release flash mode Normally when I do a "Run to cursor" in the C-Spy JTAG debugger, it runs fast in source...

IAR EWARM 4.42a J-Link LPC2144 Release flash mode Normally when I do a "Run to cursor" in the C-Spy JTAG debugger, it runs fast in source or dissassembly window. I thought anyway. When a run to cursor is selected, doesn't the JTAG put a breakpoint in the LPC JTAG hardware to have it stop ??? In the code below, there is a memory clear init, but it appears to go extremely s l o w in this...


JTAG for LPC2148

Started by raju_nem in LPC200010 years ago 3 replies

I have lpc2148 from spj embedded systems.i try to use a JTAG parallel port for debugging.i made a ckt which in the below link,ckt is fine.what...

I have lpc2148 from spj embedded systems.i try to use a JTAG parallel port for debugging.i made a ckt which in the below link,ckt is fine.what JTAG software i need to use for this ckt and lpc2148.i am using GNU arm gcc compiler on windows operating system. in my lpc2148 board,JTAG pins are 10. http://www.frozeneskimo.com/electronics/wp-content/uploads/Schematics/jtagwigglersch.png. ------...


Troubleshooting JTAG communication

Started by Sutton Mehaffey in LPC200012 years ago

I have had a prototype board working for many months and the JTAG for both my XPLA (4 wires) and LPC2148 CPU (6 wires) working right from the...

I have had a prototype board working for many months and the JTAG for both my XPLA (4 wires) and LPC2148 CPU (6 wires) working right from the getgo (different connectors). However, I have just received our prototype #2 board with what I believe to be the same JTAG connections. The XPLA programs fine as before, but I am having a bit of trouble getting anything but the infamous 'JTAG communic...


JTAG Breakpoint question...

Started by bobtransformer in LPC200012 years ago 1 reply

IAR EWARM 4.42a J-Link LPC2144 Release flash mode Normally when I do a "Run to cursor" in the C-Spy JTAG debugger, it runs fast in source or...

IAR EWARM 4.42a J-Link LPC2144 Release flash mode Normally when I do a "Run to cursor" in the C-Spy JTAG debugger, it runs fast in source or dissassembly window. I thought anyway. When a run to cursor is selected, doesn't the JTAG put a breakpoint in the LPC JTAG hardware to have it stop ??? In the code below, there is a memory clear init, but it appears to go extremely s l o w in this win...


CrossStudio & USB JTAG

Started by "M.G." in LPC20009 years ago 2 replies

I'm still trying to use OOCDLink JTAG under CrossStudio but without efects. I get "Cannot identify target" message. This JTAG works fine with...

I'm still trying to use OOCDLink JTAG under CrossStudio but without efects. I get "Cannot identify target" message. This JTAG works fine with OpenOCD. This is OOCDLink JTAG project: http://www.joernonline.de/dw/doku.php?id=projects:oocdlink:2_oocdlinks Schematic: http://tinyurl.com/68qkag Channel A ADBUS0 -> TCK; ADBUS1 -> TDI; ADBUS2 -> TDO; ADBUS3 -> TMS; ADBUS4 -> ADBUS5 -> AD


CrossStudio & OOCDLink JTAG

Started by tomi in LPC200011 years ago

I'm still trying to use OOCDLink JTAG under CrossStudio but without efects. I get "Cannot identify target" message. This JTAG works fine with...

I'm still trying to use OOCDLink JTAG under CrossStudio but without efects. I get "Cannot identify target" message. This JTAG works fine with OpenOCD. This is OOCDLink JTAG project: http://www.joernonline.de/dw/doku.php?id=projects:oocdlink:2_oocdlinks Schematic: http://tinyurl.com/68qkag Channel A ADBUS0 -> TCK; ADBUS1 -> TDI; ADBUS2 -> TDO; ADBUS3 -> TMS; ADBUS4 -> ADBUS5 -> AD


JTAG Programming for LPC2138

Started by sudipnag1 in LPC200014 years ago 2 replies

I have tried to program a fresh/new LPC2138 using Wiggler and Cross Studio 1.4. After creating a new project and copying a sample program...

I have tried to program a fresh/new LPC2138 using Wiggler and Cross Studio 1.4. After creating a new project and copying a sample program I have built the code. But unable to initialize JTAG port (The message is "Cannot identify target. Check JTAG connections and that the target is powered". The chip was powered and JTAG connection was corre


LPC2368 that won't start without JTAG

Started by Jan Thogersen in LPC200012 years ago 32 replies

Hi all, My LPC2368 won't start without the JTAG in use. When I use the JTAG to download firmware and debug there is no problems, firmware...

Hi all, My LPC2368 won't start without the JTAG in use. When I use the JTAG to download firmware and debug there is no problems, firmware runs absolutely fine! However, when I disconnect the JTAG and leaves the CPU on it's own, then nothing happens...The firmware doesn't get executed. I have checked the reset circuit and it works fine. To get closer to the answer I tried connecting to ...


LPC2468 & Jtag Failure

Started by maveric_pta in LPC20009 years ago 4 replies

I have design my own custom Board. I have confirmed that all JTAG connections are correct and have confirmed my ULink-ME is working on a STM32...

I have design my own custom Board. I have confirmed that all JTAG connections are correct and have confirmed my ULink-ME is working on a STM32 development board. I am using uVision4. Using standard Blinky project from Keil. When I tried to connect to the CPU I get JTAG Communication Failure. I have confirmed that all pull up and pull down resistors are correct on JTAG .. I have assembled a ...


Re: Unreliable Secondary JTAG Connection

Started by bruce_p1 in LPC200014 years ago 5 replies

I was searching through this group to see if anyone else was having an unreliable secondary JTAG connection issue with the LPC210x chips;...

I was searching through this group to see if anyone else was having an unreliable secondary JTAG connection issue with the LPC210x chips; guess I'm not alone. I too am using a Nohau JTAG debugger; the EMUL-ARM, but that doesn't seem to be the issue. According to the LPC210x datasheet, to enable secondary JTAG you have to bring DBGSEL or RT


bug in JTAG implementation?

Started by Bhanu Nagendra Pisupati in LPC200014 years ago 1 reply

When a value is shifted into the scan select register of the Embedded ICE module of the lpc parts (through JTAG), ARM7TDMI documentation...

When a value is shifted into the scan select register of the Embedded ICE module of the lpc parts (through JTAG), ARM7TDMI documentation specifies that the binary value '1000' needs to be shifted out. However, after much ado I discovered that this is not the case in my lpc2214. This does not seem to affect any other aspect of JTAG debugging though. Has anybody else see


RDI

Started by naderus2000 in LPC200013 years ago 1 reply

if i want to buy a jtag that work in both iar and keil the only solution is RDI. is there any USB RDI JTAG?low price. i need a little more...

if i want to buy a jtag that work in both iar and keil the only solution is RDI. is there any USB RDI JTAG?low price. i need a little more information of RDI type Jtag thanks.


JTAG consulting

Started by Gus in LPC200014 years ago 7 replies

Hello, We are interested in buying your JTAG code for LPC chips. The code has to be written in C++ for the parallel port JTAG from...

Hello, We are interested in buying your JTAG code for LPC chips. The code has to be written in C++ for the parallel port JTAG from olimex. Even better, if you have code to run JTAG on the new FTDI USB chip. Your code should be able to - read/write RAM - set/clear hardware breakpoints - set/clear software breakpoints - read the pr


help: LPC2888 jtag can't connect!

Started by p13155138327 in LPC200012 years ago 5 replies

hi,all. i debug my board .First ,using LPC2880,JTAG can connect.My compiler is keil with ulink. Now i change LPC2888 ,JTAG can't...

hi,all. i debug my board .First ,using LPC2880,JTAG can connect.My compiler is keil with ulink. Now i change LPC2888 ,JTAG can't connect.When JTAG_SEL do not pull up. in KEIL ????OPTION????DEBUG????SETTINGS ????JTAG DEVICE CHIAN,IDCORE :0X1010202B,UNKONW JTAG DEVICE ,4 the same as lpc2880. BUT When JTAG_SEL pull up,JTAG enable ,in KEIL ????OPTION????DEBUG?? ??SETTINGS????J...


reliably detecting JTAG on powerup for 2132

Started by Kevin Lynch in LPC200010 years ago 3 replies

Hello - Is there a way to reliably detect the presence of JTAG on powerup that also works after a watchdog reset? On powerup, I want to...

Hello - Is there a way to reliably detect the presence of JTAG on powerup that also works after a watchdog reset? On powerup, I want to detect if the JTAG is present so that I dont enable the watchdog when the JTAG is present. The obvious thing would be to check bit 2 of PINSEL2. This mostly works - On pin reset, powerup or brownout, this bit is set when the JTAG is present and low o...


Re: Another JTAG issue. Heads up

Started by Tom Walsh in LPC200013 years ago

Landrum Haddix wrote: > Hi, > > I found a really hard to track down hardware problem today > that was forcing the JTAG port to not work. >...

Landrum Haddix wrote: > Hi, > > I found a really hard to track down hardware problem today > that was forcing the JTAG port to not work. > > I am using an LCP2138 and JTAG quit working after a board rev. > > We had pulled P0.31 down because it was the enable for a 485 > transciever and needed to be low during reset. > > =20=20 > Just a note, I got nailed by this one. Even though I "knew be


H-JTAG Problems?

Started by tmasyl in LPC200011 years ago 3 replies

Greetings: I have been trying use H-JTAG to program LPC21xx FLASH without success so far. I wonder if anyone else within this group has had...

Greetings: I have been trying use H-JTAG to program LPC21xx FLASH without success so far. I wonder if anyone else within this group has had success with this software? I am running Windows XP SP2. My Olimex wiggler clone interface works good under my installation of Rowley's CrossWorks for ARM development system IDE however it does not work with H-JTAG. Instead of detecting the MPU on ...