[SOLVED] J-Flash readrange behavior different with GUI and command line

sharon · Dec 1st 2022, 7:25am

When using JFlash to read memeory, input NumBytes parameter to Blankcheck is different. By command line, it always be 4 and by GUI, it will be the actual bytes from range.
Is it normal? Thanks.

By command line:
"C:\Program Files\SEGGER\JLink\JFlash.exe" -openprjmytest3.jflash /min /wait -connect -readrange,0x10078000,0x1007FFFF
Result log:
Reading target memory (0x10078000 - 0x10078000) ...
- Start of determining flash info (Bank 0 @ 0x10078000)
- End of determining flash info
- Flash bank info:
- 8 * 4 KB @ 0x10078000
- Start of preparing flash programming
- End of preparing flash programming
- [b]Blank checking 0x10078000 - 0x10078003[/b]
- Start of restoring
- End of restoring
- Target memory read successfully. (4 bytes, 1 range) - Completed after 0.103 sec
J-Flash V7.80: Target memory read successfully. (4 bytes, 1 range) - Completed after 0.103 sec

By GUI:
Target -> Manual Programing -> Read Back -> Range -> 0x10078000 - 0x1007FFFF
Result log:
[tt]Reading target memory (0x10078000 - 0x1007FFFF) ...
- Start of determining flash info (Bank 0 @ 0x10078000)
- End of determining flash info
- Flash bank info:
- 8 * 4 KB @ 0x10078000
- Start of preparing flash programming
- End of preparing flash programming
- [b]Blank checking 0x10078000 - 0x1007FFFF[/b]
- Start of restoring
- End of restoring
- Target memory read successfully. (32768 bytes, 1 range) - Completed after 0.281 sec

mwb1100 · Dec 2nd 2022, 7:26pm

Remember that Segger's command line utility options have the unusual requirement that parameters to options must follow the option with no whitespace or punctuation.

Try this command line:

Source Code

"C:\Program Files\SEGGER\JLink\JFlash.exe" -openprjmytest3.jflash /min /wait -connect -readrange0x10078000,0x1007FFFF

I can't guess a reason why the utility interprets "-readrange,0x10078000,0x1007FFFF" as a 4 byte read starting from 0x10078000 other than it's confused by that first comma.

sharon · Dec 6th 2022, 8:10am

Hi mwb1100,

Thanks for the reply. After correct the command, it works. Thanks.

SEGGER - Alex · Dec 6th 2022, 8:46am

@sharon Good to hear that you are up and running

@mwb1100 It is not really an unusual requirement of "SEGGER's command line utility" but more a J-Flash specific thing. We are in the process of changing that to make it more standard but at the same time keep backward compatibility. The J-Flash command line was designed ages ago and is indeed somewhat weird at some points.

Source Code

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