[riot-notifications] [RIOT-OS/RIOT] Stm32lx dual bank (#11174)

Francisco notifications at github.com
Wed Mar 13 17:28:18 CET 2019


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### Contribution description

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This PR adds the option to use the stm32l0_dual_bank.cfg configuration file for flashing with openocd. This allows to use the full flash space. The problem is this is not available on all openocd versions, needs to be compiled from source to be present. That is why I added a Makefile variable that a user can define if it flashes using stm32l0_dual_bank.cfg instead of stm32l0.cfg. In #11141 @aabadie sugested the default behavior should be using stm32l0.cfg. I welcome thoughts on a better way to do this, (some clever way to check opeoncd version?). 

#10206 won't be fixed on build tests unless OPENOCD_STM32L0_DUAL_BANK=1 is set.

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It can be tested by the same procedure as #11141 or veryfing the is fixes the issue in #10206 by running:

`make BOARD=b-l072z-lrwan1 OPENOCD_STM32L0_DUAL_BANK=1 -C examples/lua_basic/  flash
`
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 Fixes #10206, needed by #11141.
You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/11174

-- Commit Summary --

  * boards/stm32: provide dual bank support for stm32l0
  * boards/stm32l07x: openocd dual bank option for l07x

-- File Changes --

    M boards/b-l072z-lrwan1/Makefile.include (9)
    A boards/common/stm32/dist/stm32l0_dual_bank.cfg (3)
    M boards/nucleo-l073rz/Makefile.include (8)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/11174.patch
https://github.com/RIOT-OS/RIOT/pull/11174.diff

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