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5 years, 3 months ago.
nrf52 blinky on mbed - Error compilling original sample...
Hi
I would like to give a try to nrf52 on mbed. So I went to:
https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-blinky/
and clicked Import to compiler
I check the update... check box and the project was imported. The target board is selected on the top right corner ("Nordic nRF52-DK")
When I click Compile | Build only Lots of warnings as displayed but one error is also displayed:
Error: Non-constant-expression cannot be narrowed from type 'int' to 'std::uint8_t' (aka 'unsigned char') in initializer list [-Wc++11-narrowing] in "extras/mbed-os.lib/features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NORDIC_SOFTDEVICE/TARGET_NRF52/source/nRF5xGap.cpp", Line: 749, Col: 9
Why is this error appearing with the original source code? How to solve it?
By the way, is mbed using the softdevice from nordic or an alternative one?
Thanks
Alex
1 Answer
5 years, 3 months ago.
Hi Imo,
I have reproduced the error.
Please update mbed-os form 5.12.1(imported rev.) to 5.13.0(as of today).
You can compile it without an error message but still lots of warnings.
I don't test the program because I'm using the board at another place right now.
Mbed's revision control is always running, and I have never seen a stable bug-free one for the past nine years.
Be careful even the official sample program.
The lack of a stable program is likely to be the cause of the moving to Arduino from Mbed.
/questions/83388/Official-release/
Yes, Mbed nRF5x serises use Noridic Softdevice as you expect.
You can confirm it by following readme file (see SoftDevice explanation, near the end of line).
https://github.com/ARMmbed/mbed-os/blob/master/targets/TARGET_NORDIC/TARGET_NRF5x/README.md
Hello Kenji Arai Thanks it works now!
By the way, are you saying that you have put mbed apart and went to Arduino? I have been using nordic SD and the interrupt oriented way of programming but I think I will feel more confortable with a thread riented operating system hence I decided to move to mbed. But Now I reaized that you have moved from mbed to arduino . Is it true? Can I ask your advice about this issue? In arduino wich libraries do you use to program nrf52 based boards? What about energy consumption? Is arduino libraries energy efficient? thanks a lot!
posted by 13 Jul 2019Hi Imo,
No, I am in the Mbed community !!
I pointed out that even a very simple LED flashing program does not work correctly with Mbed.
This is too bad for those who have started studying Mbed for the first time.
I am concerned that such a person may choose to Arduino.
There is no objection to the big goal of Mbed such as RTOS and IOT connection, but I think that bug-free, stable condition is more important than the new function for the released mbed-os5.
For your several question, please give me a private message and discuss it separately.
Do you know the way to send a private message?
