diff options
| -rw-r--r-- | ports/nrf/modules/os/microbitfs.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/ports/nrf/modules/os/microbitfs.c b/ports/nrf/modules/os/microbitfs.c index 5ffe837ef..bc007c161 100644 --- a/ports/nrf/modules/os/microbitfs.c +++ b/ports/nrf/modules/os/microbitfs.c @@ -80,10 +80,6 @@ /** Must be such that sizeof(file_header) < DATA_PER_CHUNK */ #define MAX_FILENAME_LENGTH 120 -//Minimum number of free chunks to justify sweeping. -//If this is too low it may cause excessive wear -#define MIN_CHUNKS_FOR_SWEEP (FLASH_PAGESIZE / CHUNK_SIZE) - #define FILE_NOT_FOUND ((uint8_t)-1) /** Maximum number of chunks allowed in filesystem. 252 chunks is 31.5kB */ @@ -268,9 +264,9 @@ STATIC uint8_t microbit_find_file(const char *name, int name_len) { // Search the chunks: // 1 If an UNUSED chunk is found, then return that. // 2. If an entire page of FREED chunks is found, then erase the page and return the first chunk -// 3. If the number of FREED chunks is >= MIN_CHUNKS_FOR_SWEEP, then +// 3. If the number of FREED chunks is > 0, then // 3a. Sweep the filesystem and restart. -// 3b. Fail and return FILE_NOT_FOUND +// 3b. Otherwise, fail and return FILE_NOT_FOUND. // STATIC uint8_t find_chunk_and_erase(void) { // Start search at a random chunk to spread the wear more evenly. @@ -311,7 +307,7 @@ STATIC uint8_t find_chunk_and_erase(void) { if (index == chunks_in_file_system+1) index = 1; } while (index != start_index); DEBUG(("FILE DEBUG: %lu free chunks\r\n", freed_chunks)); - if (freed_chunks < MIN_CHUNKS_FOR_SWEEP) { + if (freed_chunks == 0) { return FILE_NOT_FOUND; } // No freed pages, so sweep file system. |