Why the buffer in Leon's JTAG interface?

Started by tkreyche in LPC200015 years ago 1 reply

I'm laying out a board to test the LPC2138 and looked at circuit diagrams for various 2106 and 2138 boards, to get the JTAG...

I'm laying out a board to test the LPC2138 and looked at circuit diagrams for various 2106 and 2138 boards, to get the JTAG right. Some of the diagrams (see Leon's in the file section) use a 74x244 to buffer the JTAG signals and optionally a transistor on the reset l


Error in uVision3

Started by cippalippa1967 in LPC200012 years ago 3 replies

Hello, I'm trying to port the Xilinx xapp058 (jtag emulator for uC) into NXP LPC2378. I modified the C code and I tryed to compile but I...

Hello, I'm trying to port the Xilinx xapp058 (jtag emulator for uC) into NXP LPC2378. I modified the C code and I tryed to compile but I have the following error: jtag.axf: Error: L6224E: Could not place port.o (.data) in any Execution region. Target not created. This is due to the large size of the buffer that contain the jtag bitstream. If I decrease the buffer, for example...


JTAG debugging on FastIO 's

Started by Sagaert Johan in LPC200014 years ago

hi I use ULINK with keil eval. When i debug code to toggle pins using fast io, the code works as expected in run mode, but when single...

hi I use ULINK with keil eval. When i debug code to toggle pins using fast io, the code works as expected in run mode, but when single stepping the pins do not follow the values they should take. Has this anything to do the way fastio connects to the internal bus, or is this a ULINK jtag bug ? I was doing this with an LPC2103 , maybe someone can try to simulate this on another JTAG d...


Do I need the JTAG port to program an LPC236x?

Started by Mike Panetta in LPC200012 years ago 5 replies

I am working on a small board design with an LPC236x on it, and I have run out of room for a JTAG connector. Do I need it for anything other then...

I am working on a small board design with an LPC236x on it, and I have run out of room for a JTAG connector. Do I need it for anything other then debugging purposes, or can I just use the serial boot loader that is built in to the chip? The chips do come with the boot loader pre-installed right? If I do need the JTAG signals for programming, what are the minimum number of signals I can get away...


Re: H-JTAG update - new release from TwentyOne works with LPC :)

Started by Karim Virani in LPC200014 years ago

Thanks Dave. Thanks particularly to TwentyOne who helped me get the settings right after receiving a wiggler-compatible from Olimex. With the...

Thanks Dave. Thanks particularly to TwentyOne who helped me get the settings right after receiving a wiggler-compatible from Olimex. With the latest version of h-jtag it works great for me when the jtag configuration is right. The trick was with the nSRST option - I had it = [No Sys Rst] when Wiggler (predefined) was active. When changed to = [Pin 6 D4] it detected the target and starte


Problem with OLIMEX JTAG

Started by soren_t_hansen in LPC200015 years ago

I've bought a Olimex JTAG and after having pacthed it (connected pin 8 & 15) O'm now able to connect to my LPC2138 with OCDRemote. But the ...

I've bought a Olimex JTAG and after having pacthed it (connected pin 8 & 15) O'm now able to connect to my LPC2138 with OCDRemote. But the problem is, that I'm only able to connect at speed 8, and when I try to debug, I keep getting errors and the debugging newer starts. Does anyone, have any experience with this Olimex Jtag/OCDRemote/GDB combo, especi


Connection new LPC2103

Started by Michael Gerkens in LPC200013 years ago 5 replies

Hello all, i have build a board with an ARM LPC2103, very simple. But i can't get a Connection via JTAG to the Controller. I work with...

Hello all, i have build a board with an ARM LPC2103, very simple. But i can't get a Connection via JTAG to the Controller. I work with CrossStudio for ARM an i'm using an USB-> JTAG Interface from CrossConnect. With a Demo-Board, i'll get a connection. All JTAG-Signal's are ok. Reset is ok. Thanks Michael


LPC2366 won't run without JTAG being connected

Started by bobtransformer in LPC200011 years ago 2 replies

What would a reason be that an LPC2366 will not run without my IAR EWARM 5.4 and the Segger JTAG being connected ??? I've seen this before I...

What would a reason be that an LPC2366 will not run without my IAR EWARM 5.4 and the Segger JTAG being connected ??? I've seen this before I think, but cannot remember why this might be. It gets stuck in a Data Abort loop. I can get the code to run by just "attaching" the debugger in the OPTIONS, rather than having to download the code. It will continue running if I remove the JTAG connec...


JTAG Wiring for LPC23xx

Started by "n.focking" in LPC200012 years ago 2 replies

Hello, according to UM10211_1.pdf (User manual for LPC23xx) page 640, some of the JTAG Pins already include built-in pull-ups/downs. This is...

Hello, according to UM10211_1.pdf (User manual for LPC23xx) page 640, some of the JTAG Pins already include built-in pull-ups/downs. This is new compared to older LPC2000 controllers. Does anyone know if JTAG works without external pull-ups /pull-downs reliably on these devices? thanks N. Focking ------------------------------------


JTAG CONNECTOR

Started by Micron Engineering in LPC200015 years ago 13 replies

The standard 2x10 JTAG connector is very space consuming, is there any other standard configuration suggested for JTAG connector? ...

The standard 2x10 JTAG connector is very space consuming, is there any other standard configuration suggested for JTAG connector? Massimo Manca, Micron Engineering -- Internal Virus Database is out-of-date. Checked by AVG Anti-Virus. Version: 7.0.308 / Vir


Re: FLASH programing of LPC 2378

Started by Karunanithy in LPC200013 years ago

hai, you can use openocd to burn you application into rom using jtag device. i am using arm-usb-ocd jtag and i can burn binary into rom using...

hai, you can use openocd to burn you application into rom using jtag device. i am using arm-usb-ocd jtag and i can burn binary into rom using openocd and jtag if you want know more about openocd have a look at this sit http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/#oocd_intro karuna ----- Original Message ---- From: jdauchot To: l...@yahoogroups.c


JTAG programming

Started by ovidearistide in LPC200014 years ago 1 reply

Hi, I am trying to program my flash memory via the JTAG interface. However, I am unable to find enough documentation on the JTAG...

Hi, I am trying to program my flash memory via the JTAG interface. However, I am unable to find enough documentation on the JTAG interface. Can anyone give me a kickstart? I am trying to flash in two ways: 1) From the flash itself (Firmware update). 2) Externally (initial flash). Ad 1) This is the most important one for me. To achieve this I need to execute my firmware update code i...


Powerdown mode and losing JTAG based programming/debugging

Started by Sean in LPC200013 years ago 1 reply

So I have found that whenever I enter powerdown mode, I lose my ability to connect via JTAG. This forces me to reprogram via the serial port...

So I have found that whenever I enter powerdown mode, I lose my ability to connect via JTAG. This forces me to reprogram via the serial port when the last program was a Powerdown enabled program. This is a pain in the tail and doesn't entirely make sense to me. While JTAG would likely not work when it goes into powerdown, causing a reset should allow me to restore communication, correct...


LPC2103 won't program

Started by Gus in LPC200014 years ago 1 reply

I am not able to connect to LPC2103 chip. I tried to read the ID using LPC flash utility and tried to connect through JTAG with no luck at ...

I am not able to connect to LPC2103 chip. I tried to read the ID using LPC flash utility and tried to connect through JTAG with no luck at all. I have DBGSEL connected to 3.3V to enable JTAG but didn't work. Any ideas? RTCK doesn't select JTAG in this chip, correct? Anyone was able to get the manual or updated flash utility for these


JTAG died on development board?

Started by jcbrooks75 in LPC20009 years ago 8 replies

All, I've been developing successfully on the Olimex LPC H2294 for a while until recently when the JTAG appears to have died. I thought at...

All, I've been developing successfully on the Olimex LPC H2294 for a while until recently when the JTAG appears to have died. I thought at first it was the debugger but I purchased another debugger and it still doesn't work. This makes me believe it is the development board. In addition the jtag debugger has an led which does not light. This also indicates the problem is with the development bo...


JTAG and ETM on LPC2114 64pin chip

Started by Gus in LPC200016 years ago

Hello, Can anyone double check my understanding please. On LPC2114 you can enable JTAG or ETM or both. When enabeling JTAG ...

Hello, Can anyone double check my understanding please. On LPC2114 you can enable JTAG or ETM or both. When enabeling JTAG only you can use the ETM pins as I/O; therefore, only 6 pins are needed to connect to the chip and debug and all the rest of the pins can be I/O


OCDremote - unexpected packet start received

Started by sbechtho in LPC200015 years ago

Hi, I use the a free Windows utility called OCDremote v2.14 for JTAG debugging from Macraigor and the Olimex ARM JTAG Adapter. I...

Hi, I use the a free Windows utility called OCDremote v2.14 for JTAG debugging from Macraigor and the Olimex ARM JTAG Adapter. I start OCDremote first and after that the INSIGHT debugger connecting to the Board via JTAG. Now I download my program. The Result is, that I receive the following error from OCDremote: "Unexpected packet


Aout bug with JTAG disconnected ?

Started by armdeveloper in LPC200013 years ago

I've got a circuit that works great, no problems with the JTAG debugger connected. If I disconnect the JTAG debugger and leave the debugging...

I've got a circuit that works great, no problems with the JTAG debugger connected. If I disconnect the JTAG debugger and leave the debugging jumper in place, the processor seems to emit an errant Aout signal from time to time. Its kind of like it resets, but its not resetting. It seems to operate fine again if I remove the debugger jumper. Can anyone explain this behavior ? Thanks...


Re: JTAG RTCK / Jeeni question

Started by Michael Johnson in LPC200015 years ago

Hi Arie, I would agree that the RTCK is useful. This thread started when someone wanted to throw away JTAG pins. I would throw away...

Hi Arie, I would agree that the RTCK is useful. This thread started when someone wanted to throw away JTAG pins. I would throw away TRST (tap reset - which can be done via JTAG) rather than RTCK. Regards Michael >From: "Michael Johnson" > > >>The RTCK isn't strictly needed. Without the RTCK


JTAG is no working in LPC2387..

Started by bilgicini in LPC200012 years ago 2 replies

I designed a small simple board using LPC2387. However, JTAG interface does not respond to my Wiggler clone. I watched the signals and...

I designed a small simple board using LPC2387. However, JTAG interface does not respond to my Wiggler clone. I watched the signals and found that all TDI, TMS, TRST, TCK signals are present but TDO signal coming from LPC stays high -I think it is also because of pull up resistor I placed. What might be missing? Am I missing to connect some pins to somewhere to enable the JTAG interface? O...