[riot-notifications] [RIOT-OS/RIOT] cpu/stm32g4: add basic support + add nucleo-g474re board (#14166)

Alexandre Abadie notifications at github.com
Fri May 29 10:10:01 CEST 2020


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### Contribution description

This PR adds support for the STM32 G4 family of CPUs and add support for the nucleo-g474re.

- What has been tested with success so far: uart, rtt, timer, hwrng
- What has been tested but doesn't fully work: flashpage. There's an issue with the raw mode.
- What is not available in this port:
  - i2c: could be configured but doesn't work. Probably because of a I2C clock misconfiguration. I haven't looked in detail yet
  - rtc: this peripheral is quite different than other STM32
  - spi: not tried yet but maybe it will work if configured on the board

The clock configuration uses a similar strategy as the one used in #14163. Depending on the one that is merged first, I'll factorize the 2.

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### Testing procedure

- A green Murdock
- Run `./dist/tools/compile_and_test_for_board/compile_and_test_for_board.py . nucleo-g474re --jobs=4` and check the results are ok (will report later when done).

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### Issues/PRs references

None

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

  https://github.com/RIOT-OS/RIOT/pull/14166

-- Commit Summary --

  * cpu/stm32: add support for stm32g4
  * boards/common/stm32: add common configuration for stm32g4 boards
  * boards/nucleo-g474re: add support for nucleo-g474re

-- File Changes --

    M boards/common/nucleo64/include/board.h (2)
    M boards/common/nucleo64/include/gpio_params.h (2)
    A boards/common/stm32/dist/stm32g4.cfg (3)
    A boards/common/stm32/include/g4/cfg_clock_default.h (77)
    A boards/nucleo-g474re/Makefile (4)
    A boards/nucleo-g474re/Makefile.dep (3)
    A boards/nucleo-g474re/Makefile.features (13)
    A boards/nucleo-g474re/Makefile.include (2)
    A boards/nucleo-g474re/doc.txt (26)
    A boards/nucleo-g474re/include/periph_conf.h (91)
    M cpu/stm32/Makefile.features (6)
    M cpu/stm32/cpu_common.c (21)
    M cpu/stm32/cpu_init.c (2)
    M cpu/stm32/include/cpu_conf.h (14)
    M cpu/stm32/include/periph_cpu.h (17)
    A cpu/stm32/include/vendor/stm32g474xx.h (17907)
    A cpu/stm32/include/vendor/stm32g4xx.h (199)
    M cpu/stm32/periph/Makefile (2)
    M cpu/stm32/periph/flash_common.c (3)
    M cpu/stm32/periph/flashpage.c (19)
    M cpu/stm32/periph/gpio_all.c (9)
    M cpu/stm32/periph/pm.c (12)
    M cpu/stm32/periph/rtc_all.c (5)
    M cpu/stm32/periph/rtt_all.c (7)
    M cpu/stm32/periph/uart.c (12)
    M cpu/stm32/stm32_info.mk (4)
    M cpu/stm32/stm32_mem_lengths.mk (7)
    M cpu/stm32/stmclk/Makefile (2)
    M cpu/stm32/stmclk/stmclk_common.c (2)
    A cpu/stm32/stmclk/stmclk_g4.c (125)
    A cpu/stm32/vectors/vectors_g4.c (257)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/14166.patch
https://github.com/RIOT-OS/RIOT/pull/14166.diff

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