[SOLVED] Running JLink through batch file does not work through LabVIEW

LearningLabVIEW · June 28, 2024 at 4:11 PM

Hello,

I have a batch file that calls JLink.exe to set it up and run a command file.

.bat file contents

Code

"C:\Program Files\SEGGER\JLink_V792o\JLink.exe" -device AT91SAM4SA16C -if swd -speed 4000 -CommandFile "C:\Users\Tester\Desktop\New Board Programming\Data\J-Tag Fusion\test_jtag_full_load_new.jlink"
pause

command file contents

Code

connect
si 1
speed 4000
reset
halt
erase 0x400000,0xFFFFFF
loadbin ExampleFile.bin,0x400000
exit

When I right click the .bat file located in a folder on my desktop and run it, I have no issue with it running. When I call the .bat file in LabVIEW, I get the following error:

J-Link>loadbin Example.bin,0x400000
'loadbin': Performing implicit reset & halt of MCU.
Downloading file [Sam4sRecoveryFullImage.bin]...
Failed to open file.
J-Link>exit

My question is, if it is failing to open the file, is there any other way I could call that file for it to be able to work though LabVIEW?

SEGGER - Alex · July 4, 2024 at 9:57 PM

Sounds like it has to do with the “working directory” (https://en.m.wikipedia.org/wiki/Working_directory)

When you click the bat file, the working directory of the bat file code is the location of thw bat file.
That working directory is inherited by JLink.exe, so when opening the relative(!) file path <Example.bin> the file is searched in the working directory (same location where the bat file is)

When you call the bat file from within LabVIEW, the working directory is most probably the location of your LabVIEW project.
So that working directory is inherited by the bat file and finally by JLink.exe
Now <Example.bin> is searched where your LabVIEW project is located and not where the bat file is located.

See here:
https://forums.ni.com/t5/Example-Cod…EW/ta-p/3507703

LearningLabVIEW · July 24, 2024 at 3:02 PM

The solution ended up being that the source code in the .jlink file needed to contain the entire path to the bin file, not just the bin file name.

[SOLVED] Running JLink through batch file does not work through LabVIEW

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