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enhance msc flash

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This commit is contained in:
hathach 2018-06-18 15:42:00 +07:00
parent 9ddcff92a7
commit 45a0f24a31
1 changed files with 5 additions and 1 deletions
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6
src/msc/msc_flash.c
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@ -276,7 +276,8 @@ int32_t tud_msc_write10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t
uint32_t addr = lba2addr(lba) + offset; uint32_t addr = lba2addr(lba) + offset;
/* 1. queue flash erase pstorage_clear(), return 0 until erasing is done /* 0. Check if flash is the same as data -> skip if matches
* 1. queue flash erase pstorage_clear(), return 0 until erasing is done
* 2. queue flash writing, return 0 until writing is complete * 2. queue flash writing, return 0 until writing is complete
* 3. return written bytes. * 3. return written bytes.
* *
@ -287,6 +288,9 @@ int32_t tud_msc_write10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t
{ {
case WRITE10_IDLE: case WRITE10_IDLE:
{ {
// No need to write if flash's content matches with data
if ( 0 == memcmp(buffer, (void*) addr, bufsize) ) return bufsize;
uint32_t page_addr = align4k(addr); uint32_t page_addr = align4k(addr);
uint32_t off4k = offset4k(addr); uint32_t off4k = offset4k(addr);