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Merge pull request #55 from ARMmbed/g-softer-erase 

Changed erase to just noop if erases are too small for erase command
pull/7774/head
Deepika 2017-08-28 15:17:46 -05:00 committed by GitHub
parent 6b10f286f5 bab6699799
commit 1d3fa9db3a
1 changed files with 10 additions and 2 deletions
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12
SDBlockDevice.cpp
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@ -558,7 +558,15 @@ int SDBlockDevice::erase(bd_addr_t addr, bd_size_t size)
} }
int status = BD_ERROR_OK; int status = BD_ERROR_OK;
size -= _block_size; // Toss out erases that are too small, this is fine as the block device api
// doesn't garuntee the final state of erased bytes and a following program
// will still work fine.
if (size < _erase_size) {
_lock.unlock();
return status;
}
size -= _erase_size;
// SDSC Card (CCS=0) uses byte unit address // SDSC Card (CCS=0) uses byte unit address
// SDHC and SDXC Cards (CCS=1) use block unit address (512 Bytes unit) // SDHC and SDXC Cards (CCS=1) use block unit address (512 Bytes unit)
if (SDCARD_V2HC == _card_type) { if (SDCARD_V2HC == _card_type) {
@ -594,7 +602,7 @@ bd_size_t SDBlockDevice::get_program_size() const
bd_size_t SDBlockDevice::get_erase_size() const bd_size_t SDBlockDevice::get_erase_size() const
{ {
return _erase_size; return _block_size;
} }
bd_size_t SDBlockDevice::size() const bd_size_t SDBlockDevice::size() const