topic Re: Segger J-Link debugger with real-time read,write parameter in Kinetis Design Studio

Segger J-Link debugger with real-time read,write parameter

kornwutchalermm — Tue, 24 Mar 2015 10:04:20 GMT

Hello,

I have J-Link V.8.00 (Segger) and and we will buy TWR-KV31F120M.

If i debugging via JTAG it can real-time read,write variable?

Now i can connected J-Link with KDS V.2.00.

Thank you.

Re: Segger J-Link debugger with real-time read,write parameter

mjbcswitzerland — Tue, 24 Mar 2015 15:12:22 GMT

If you buy a TWR-KV31F120M it has an on-board debugger and so doesn't need an external one (although this can also be used with the connect pin adapter - J-Link can be selected in KDS as debugger too).

Regards

Mark

Kinetis: µTasker Kinetis support

KV10: µTasker Kinetis TWR-KV10Z32 support

KV31: µTasker Kinetis TWR-KV31F120M support

For the complete "out-of-the-box" Kinetis experience and faster time to market

Re: Segger J-Link debugger with real-time read,write parameter

kornwutchalermm — Wed, 25 Mar 2015 05:33:53 GMT

Thank you for answered my question.

I knew TWR-KV31F120 can debug on - board and does not need an external one .Anyway, I need to read-write value and debug in real –time via JTAG in KDS (Don’t need to use Freemaster). Can Segger read-write value and debug in real time via JTAG?

Thank you

Re: Re: Segger J-Link debugger with real-time read,write parameter

ivadorazinova — Wed, 25 Mar 2015 12:32:07 GMT

Hello chalermmeekol,

please, do you try for watching variables to install the plugin EmbSysRegView, you get it here EmbSysRegView ?

is an Eclipse Plugin which is designed for monitoring and modifying memory values.

Please, look at Updated Eclipse EmbSysReg Viewer with extra Freescale SVD Files | MCU on Eclipse

I hope it helps,

Iva

Re: Re: Segger J-Link debugger with real-time read,write parameter

mjbcswitzerland — Wed, 25 Mar 2015 12:44:24 GMT

Note also that FreeMaster can be used to do some real-time variable monitoring/writing: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=FREEMASTER&fsrch=1&sr=5&pageNum=1

It will not be as fast (or unintrusive) as JTAG based but generally could be useful without any debugger connected.

Regards

Mark

Kinetis: µTasker Kinetis support

KV10: µTasker Kinetis TWR-KV10Z32 support

KV31: µTasker Kinetis TWR-KV31F120M support

For the complete "out-of-the-box" Kinetis experience and faster time to market

Re: Re: Segger J-Link debugger with real-time read,write parameter

ivadorazinova — Wed, 25 Mar 2015 12:57:36 GMT

Dear chalermmeekol ,

I can recommend you the tutorial for visualization and run-time debugging for Freemaster

Tutorial: FreeMASTER Visualization and Run-Time Debugging | MCU on Eclipse

You can also try remote access control between two computers.

FREEMASTER: Remote Server Tutorial

Best Regards,

Iva

Re: Segger J-Link debugger with real-time read,write parameter

ivadorazinova — Wed, 25 Mar 2015 14:00:56 GMT

Yes, but only with J-Trace device. But I´m checking it... and tell you more.

SEGGER - The Embedded Experts - J-Trace ARM

Best Regards,

Iva

Re: Segger J-Link debugger with real-time read,write parameter

Jorge_Gonzalez — Wed, 25 Mar 2015 23:47:01 GMT

Hello kornwut chalermmeekol:

Yes, it is possible to read-write variables while debugging with Segger J-Link. You can use the "Expressions" view:

Or the "Memory" view:

Of course write operations are only valid for RAM space.

Regards!,
Jorge Gonzalez

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Re: Re: Segger J-Link debugger with real-time read,write parameter

ivadorazinova — Fri, 27 Mar 2015 08:37:19 GMT

Dear kornwut chalermmeekol,

As Jorge mentioned, you can watch variables via expression view in KDS, but you must stop the program. It is not real-time routine.

The differences between J-Trace and J-Link is that J-Trace periodically halt cpu and read data from registers.

Here are the main differences, while ETM Trace is shortcut for Embedded Trace Macrocell, CoreSight Trace Macrocells - ARM

and ETB is shortcut for Embedded Trace Buffer, small, circular on-chip memory area where trace information is stored

during capture. It contains the data which is normally exported immediately after it has been captured from the ETM.

There are a lot of these tools, which you can use for the watching variables for J-Link.

Another one is e.g. J-Mem Memory Viewer, but it is for J-link too, because you must always stop the program

You can also use J-scope, it is something like Freemaster for J-link is a free-of-charge software to analyze and visualize data on a microcontroller in real-time, while the target is running.

You just choose target device, target interface and speed and its elf file.

SEGGER - The Embedded Experts - J-Scope

You can also look at User Guide for J-Link

https://www.segger.com/cms/admin/uploads/productDocs/UM08001_JLink.pdf

I hope this helps,

Iva

Re: Segger J-Link debugger with real-time read,write parameter

kornwutchalermm — Fri, 27 Mar 2015 11:59:35 GMT

Thank you for all answer and support

1. I tried to use IAR + j link + FRED-KL25 connect with SWD not JTAG, it can real time read-write variables.

2. I tried to use Keil + j link + FRED-KL25 connect with SWD not JTAG, it real time can read-write variables.

Only KDS it can't read-write variable. Please confirm me again, KDS can real time read-write variables or not.

I will show my test result in clip video for you to understand clearly.

Keil Real time read write

IAR Real time read write

Regards,

Kornwut Chalermeekol

Re: Segger J-Link debugger with real-time read,write parameter

piergiovannigor — Fri, 27 Mar 2015 12:07:39 GMT

I have installed EmbSysRegView and made some test whith this software. It is very useful, but the values are upadated only when a breakpoint or a stop are executed and not in rela time.

Best Regards,

Pier Giovanni

Re: Segger J-Link debugger with real-time read,write parameter

ivadorazinova — Fri, 27 Mar 2015 19:39:21 GMT

HI Pier,

yes, exactly. that´s what I ´m talking about...

Best Regards,

Iva

Re: Segger J-Link debugger with real-time read,write parameter

ivadorazinova — Mon, 30 Mar 2015 10:39:32 GMT

Hi kornwut,

Thank you for your attached test results.

Yes, exactly. I can confirm you, that KDS is not able to read/write variables in real time in debug mode, you can achieve it by using FreeMASTER, Tutorial: FreeMASTER Visualization and Run-Time Debugging | MCU on Eclipse

Best Regards,

Iva

Re: Segger J-Link debugger with real-time read,write parameter

BlackNight — Mon, 30 Mar 2015 11:14:30 GMT

Segger has many other means to access the data in realtime, see

https://www.segger.com/j-link-j-scope.html

https://www.segger.com/j-link-swo-viewer.html

SEGGER - The Embedded Experts - World’s first real time terminal with SEGGER J-Link

Which all are possible to be used in combination with KDS.

Erich