[SOLVED] Command line options. How to use readrange, save and saveas

Hi all,

I'm using the command line option readrange to get some data stored in my MCU. It works well and shows the data read as you can see in "readrange.png":

cd C:\Program Files (x86)\SEGGER\JLink
JFlash.exe -openprj%~dp0\SerialNumberDataFlash.jflash -readrange0x40100070,0x40100083
IF ERRORLEVEL 1 GOTO ERROR


:ERROR
echo %ERRORLEVEL%
ECHO J-Flash ARM: Error!
pause

Now, I want to save that data, but it's not working.
- Save command:

JFlash.exe -openprj%~dp0\SerialNumberDataFlash.jflash -readrange0x40100070,0x40100083 -save

This code doesn't return error, but it doesn't save the data on my hard drive. How can I tell the code where to store it?

- Saveas command:

JFlash.exe -openprj%~dp0\SerialNumberDataFlash.jflash -readrange0x40100070,0x40100083 -saveas%~dp0\Data.bin

This code returns ERRORLEVEL = 1

What am I doing wrong?

Hello Fabian.

I solved the problem with "-saveas":

Quote from Hardwariano

JFlash.exe -openprj%~dp0\SerialNumberDataFlash.jflash -readrange0x40100070,0x40100083 -saveas%~dp0\Data.bin

For some reason I don't know, JFlash didn't recognize "%~dp0", which returns the current path of the .bat file. The solution was simple:

set path_MAIN=%~dp0
JFlash.exe -openprj%~dp0\SerialNumberDataFlash.jflash -readrange0x40100070,0x40100083 -saveas%path_MAIN%Data.bin

It now works well.

Regarding "-save" command I think I misunderstood the way it works . I thought it would record a different ".srec" file, but it actually overwrote the same ".srec" file that had been opened before with "-open" command:

set path_MAIN=%~dp0
JFlash.exe -openprj%path_MAIN%SerialNumberDataFlash.jflash -open%path_MAIN%SerialNumberDataFlash.srec -save
REM This overwrites "SerialNumberDataFlash.srec" after opening it

No that I know this, I rewrite muy question: Does "-save" command work if I had not previously opened a ".srec" file with "-open" command? That's to say, If I have only used "-readrange" command to get some data from the microcontroller, as you can see below:

Quote from Hardwariano

JFlash.exe -openprj%~dp0\SerialNumberDataFlash.jflash -readrange0x40100070,0x40100083 -save

Hello Fabian

Quote from SEGGER - Fabian

As you can see from the example, save has a very special use case.
Therefore -saveas is the go-to in 99.9% of the cases.

It's just what I thought after doing several tests.

Quote from SEGGER - Fabian

Does this answer your question?

Yes, this answers my question.Thanks.
I suggest including the explanation you gave me in the next version of the manual.

I have only one more question. Is it possible to store the data read with "-readrange" in a variable to use it in the .bat program? I mean, without saving a new file (with "-saveas") and then reading it manually.

Regards.

Quote from SEGGER - Fabian

What you could do alternatively is to buy our J-Link SDK:
segger.com/products/debug-prob…nk/technology/j-link-sdk/
It comes with a source project (in C code) of the J-Link Commander (and more) so you could alter it to fit your needs.

I'll take a look at it.

Quote from SEGGER - Fabian

Does this answer your questions?

Yes, it's answered so this thread can be closed.

Thanks again for your help.
Regards.