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STM32L4: Support all STM32L4 MCUs with all features. Add NUCLEO boards. #7123

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STM32L4: Support all STM32L4 MCUs with all features. Add NUCLEO boards. #7123

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Commits on Apr 15, 2021

  1. STM32L4: Support all STM32L4 MCUs with all features. 

    Add support for all STM32L4 MCUs with at least 256KB Flash,
  except L4+ series.
Add missing features to already supported MCUs.

adc.c: VBAT_DIV add all STM32L4.
boards/stm32l432.ld: Fix error in ORIGIN(FLASH_FS).
boards/stm32l452_af.csv: Fix missing EVENTOUT on PH3.
flashbdev.c: Add all STM32L4.
mpconfigboard_common.h: Add support for all MCUs with only USB_FS.
stm32_it.c: Add support for all MCUs with only USB_FS.
usbd_conf.c: Add support for all MCUs with only USB_FS.
boards/stm32l433_af.csv: Added.

Signed-off-by: Chris Mason <c.mason@inchipdesign.com.au>
    @chrismas9
    chrismas9 committed Apr 15, 2021
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  2. stm32/boards/*.ld: Support all STM32L4 MCUs, simplify memory config. 

    boards/stm32l4*.ld: Add all MCU names and sizes to linker scripts.
                   Calculate ORIGIN(FLASH_FS) to simplify changing FS size.
                   no need for duplicate values or hex entries.

The STM32L43x series with 256KB Flash have limited space for a file system.
  Depending on options (FRAMEBUF 4KB, CANbus 6KB, USB 10KB, etc) the file
  system space using LittleFS1 is typically between 14KB and 28KB.
  This needs to be tuned on a board by board basis. The linker script is
  split into a generic stm32l4xx.ld and board specific stm32l43x.ld.
  The stack / heap trade-off can also be tuned in the board linker script.

boards/stm32l4xx.ld: Generic STM32L4 linker script for RAM,
                     except L47x which does not have contiguous RAM.
boards/NUCLEO_L432KC/stm32l43x.ld: Define FLASH and stack for board.
boards/NUCLEO_L432KC/mpconfigboard.mk: Use new linker scripts.
boards/NUCLEO_L432KC/mpconfigboard.h: Cleanup and add comments on memory
    usage of modules to help optimise file system size.

Signed-off-by: Chris Mason <c.mason@inchipdesign.com.au>
    @chrismas9
    chrismas9 committed Apr 15, 2021
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  3. stm32/boards: Add new NUCLEO ports. 

    NUCLEO_L432KC_LFS1: With 28KB LFS1 file system.
NUCLEO_L433RC-P: No file system. Does not support low power SMPS.
NUCLEO_L433RC-P_LFS1: With 28KB LFS1 file system.
NUCLEO_L433RC-P_USB_LFS1: With USB and 16KB LFS1 file system.
NUCLEO_L452RE-P: Does not support low power SMPS.

The L433 ports show how to fine tune the file system size
  depending on options.
The -P boards have a low power mode with SMPS,
  but low mode power is not supported.

Signed-off-by: Chris Mason <c.mason@inchipdesign.com.au>
    @chrismas9
    chrismas9 committed Apr 15, 2021
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