[riot-notifications] [RIOT-OS/RIOT] boards: add support for kw41z-mini (#10846)

Thomas Stilwell notifications at github.com
Wed Jan 23 09:10:43 CET 2019

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coding conventions, see https://github.com/RIOT-OS/RIOT/wiki/Coding-conventions.

### Contribution description
This adds support for [kw41z-mini](https://openlabs.co/OSHW/kw41z-mini). It's much the same as frdm-kw41z except it has half the memory and no dcdc. Also no load caps on the crystals. I plan to be making them regularly unless the stm32wb ends up being a much better chip.

Put here the description of your contribution:
- describe which part(s) of RIOT is (are) involved
- if it's a bug fix, describe the bug that it solves and how it is solved
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### Testing procedure
Radio support needs #7107 

Everything I've tested seems to be working. I haven't taken a close look at low power modes yet (with #7897) aside from getting down to about 5uA and being unable to wake afterwards. I didn't pursue it further but I plan to soonish.

I just realized I've never tested I2C and I don't have anything handy to test with, but if it works on frdm-kw41z then it must work on kw41z-mini because they use the same I2C pins and I copied and pasted the I2C configuration.

- [x] ADC
- [x] DAC
- [x] GPIO
- [x] SPI
- [ ] I2C
- [x] RTC
- [x] networking (with #7107)

Details steps to test your contribution:
- which test/example to compile for which board and is there a 'test' command
- how to know that it was not working/available in master
- the expected success test output

### Issues/PRs references
Continuing the discussion from #9934, I don't see much room for combining common kw41z files. The only things I see that could be picked out are timer and xtimer configurations and `spi_clk_config`, but I don't know that it's worth it for that and there can be valid reasons for a board to change the timer.

Examples: Fixes #1234. See also #5678. Depends on PR #9876.

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-- Commit Summary --

  * boards: add support for kw41z-mini

-- File Changes --

    A boards/kw41z-mini/Makefile (3)
    A boards/kw41z-mini/Makefile.dep (10)
    A boards/kw41z-mini/Makefile.features (13)
    A boards/kw41z-mini/Makefile.include (6)
    A boards/kw41z-mini/board.c (33)
    A boards/kw41z-mini/doc.txt (5)
    A boards/kw41z-mini/include/adc_params.h (77)
    A boards/kw41z-mini/include/board.h (116)
    A boards/kw41z-mini/include/gpio_params.h (127)
    A boards/kw41z-mini/include/periph_conf.h (270)
    M tests/unittests/Makefile (1)

-- Patch Links --


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