[riot-notifications] [RIOT-OS/RIOT] tests/periph_spi: add support for printing and testing SPI clock rate… (#16727)

Hugues Larrive notifications at github.com
Fri Aug 13 11:58:22 CEST 2021


…s on stm32

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### Contribution description
Re-open #14768 because I needed it yesterday...

The current test does not allow to test all baud rates supported by the hardware and driver.
On the nucleo-f334r8 board:
* 0: 100 KHz -> 281250KHz
* 1: 400 KHz -> 281250KHz
* 2: 1 MHz -> 562500KHz
* 3: 5 MHz -> 4.5MHz
* 4: 10 MHz -> 9 MHz

It was not possible to make tests with others supported speeds (1.125 MHz, 2.25 MHz, 18MHz, and 36MHz).

One might think that this is a limitation of the RIOT SPI driver but this is no longer the case for the STM32 CPU family...
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### Issues/PRs references

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You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/16727

-- Commit Summary --

  * tests/periph_spi: add support for printing and testing SPI clock rates on stm32

-- File Changes --

    M tests/periph_spi/main.c (39)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/16727.patch
https://github.com/RIOT-OS/RIOT/pull/16727.diff

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