mirror/btstack
1
0
Fork 0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-01-29 03:32:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

btstack_tlv_flash_bank: overwrite complete entry with zeroes if we cannot just delete tag due to alignment

Browse Source
This commit is contained in:
Matthias Ringwald 2023-08-29 10:13:51 +02:00
parent 2ea4a5094c
commit 5574c439d5
1 changed files with 16 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
platform/embedded/btstack_tlv_flash_bank.c
View File

@ -356,10 +356,23 @@ static void btstack_tlv_flash_bank_delete_tag_until_offset(btstack_tlv_flash_ban
// write delete field after entry header
btstack_tlv_flash_bank_write(self, self->current_bank, it.offset+BTSTACK_TLV_ENTRY_HEADER_LEN, (uint8_t*) &zero_value, sizeof(zero_value));
#else
// overwrite tag with zero value
btstack_tlv_flash_bank_write(self, self->current_bank, it.offset, (uint8_t*) &zero_value, sizeof(zero_value));
uint32_t alignment = self->hal_flash_bank_impl->get_alignment(self->hal_flash_bank_context);
if (alignment <= 4){
// if alignment < 4, overwrite only tag with zero value
btstack_tlv_flash_bank_write(self, self->current_bank, it.offset, (uint8_t*) &zero_value, sizeof(zero_value));
} else {
// otherwise, overwrite complete entry. This results in a sequence of { tag: 0, len: 0 } entries
uint8_t zero_buffer[32];
memset(zero_buffer, 0, sizeof(zero_buffer));
uint32_t entry_offset = 0;
uint32_t entry_size = btstack_tlv_flash_bank_aligned_entry_size(self, it.len);
while (entry_offset < entry_size) {
uint32_t bytes_to_write = btstack_min(entry_size - entry_offset, sizeof(zero_buffer));
btstack_tlv_flash_bank_write(self, self->current_bank, it.offset + entry_offset, zero_buffer, bytes_to_write);
entry_offset += bytes_to_write;
}
}
#endif
}
tlv_iterator_fetch_next(self, &it);
}