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stm32f4: flash: support discontinuous sectors on banked flash

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The sector list is numerically contiguous, but the bits to write are not
contiguous.  Good job ST.

Fixes: https://github.com/libopencm3/libopencm3/pull/934

Don't see any reason to make public definitions of these sorts of magic
numbers, they're completely internal to sector addressing.
This commit is contained in:
Karl Palsson 2018-07-10 14:16:24 +00:00
parent 6e1edc3656
commit 30d88452e6
1 changed files with 5 additions and 0 deletions
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5
lib/stm32/common/flash_common_f24.c
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@ -359,6 +359,11 @@ void flash_erase_sector(uint8_t sector, uint32_t program_size)
flash_wait_for_last_operation();
flash_set_program_size(program_size);
/* Sector numbering is not contiguous internally! */
if (sector >= 12) {
sector += 4;
}
FLASH_CR &= ~(FLASH_CR_SNB_MASK << FLASH_CR_SNB_SHIFT);
FLASH_CR |= (sector & FLASH_CR_SNB_MASK) << FLASH_CR_SNB_SHIFT;
FLASH_CR |= FLASH_CR_SER;