[riot-notifications] [RIOT-OS/RIOT] Pr stm32l1 eeprom null (#11314)

Francisco notifications at github.com
Fri Mar 29 18:54:09 CET 2019

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This PR fixes an issue where category 1,2,3 stm32l1xxx devices can't write NULL bytes to eeprom (reference manual pag 78). If this is attempted the app freezes.

### Testing procedure

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You need a category 1,2 or 3 board. eg: im880b. Run:

`make -C tests/periph_eeprom BOARD=im880b test

without this PR failes.

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-- Commit Summary --

  * stm32_common/flash: add wait_for_pending_operation
  * stm32l1/eeprom: fix eeprom write for cat 1,2,3

-- File Changes --

    M cpu/stm32_common/periph/eeprom.c (70)
    M cpu/stm32_common/periph/flash_common.c (20)

-- Patch Links --


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