trying to read the firmware of a cc2541 0x41.. would return all bytes as 0xFF about cclib HOT 8 OPEN

Hello @aguaviva,
I think that's a left-over from my tests with the BLE112/BLE113 modules. If you are not using this library with these modules, you are good to go, because the memory region containing this information should be empty (0xff).

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Excellent, please let me know how can I help. If you have any ideas/links I'll be happy to investigate myself too.

Thanks for the excellent lib!! :)

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Hi again, do you have any pointers/resources I could look into for fixing this bug myself? (Unless you were planning on looking into it yourself anytime soon)

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Hello @aguaviva , I think I am wrong on my statement above. I forgot that I actually moved the license code to ble_info.py. Keep in mind that the ble_xxx.py utilities are useful only for the BlueGiga BLEXXX modules that are also using the CC2540 chip. Otherwise, the output looks reasonable.

Shall I assume that you tried the cc_read_flash.py and it's output is also everything 0xff ?

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Hi Ioanis,

Yes I tried cc_read_flash.py and that returned all 0xff's as well.

I saw you removed the bug label, is this not a bug?

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Hello @aguaviva , I thought the bug was about the extraneous "Firmware information" message. If they were present in the cc_info.py, this was a bug. (This actually was a case in the previous version -- I forgot that I actually separated that part in the ble_info.py).

Regarding the 0xff that doesn't sound like a library issue. This can be caused by a few things:

• Your flash is erased and ready to be programmed
• Wrong voltage divider resistors (or wiring) in the DD pin, causing it to be permanently on HIGH state.
• Damaged chip.

If you are not just trying to download a firmware, you can try a flash/read cycle in order to confirm that it works as expected.

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Hey @aguaviva , what's the status with this issue? Did you manage to address your problem, or it was still getting 0xff every time? Otherwise I will close this issue.

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Hi Ioannis! thanks for following up!

The python script seems to successfully detect the chip ID and the chip status, so it doesnt seem to be any of the 3 issues you mentioned. I still need to try a flash/read cycle, although I'd really like to download the firmware though.

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