Error occurred while adding a Flash region
I encountered an error while attempting to add a 4MByte Flash region to the frdmrw612_wifi_cli_over_ble_wu project, as shown in the image below.
I tried to initialize the new Flash region by creating a separate lfs_config and using the existing lfs_init function, but an error occurred during the lfs_mount process.
The error occurs specifically in the lfs_mount function when calling the lfs_dir_fetchmatch function, which returns an error value of -5.
What additional aspects should be checked when adding a new Flash region?
For reference, the symbols.ldt and end_text.ldt files have been updated with the new Flash region information, based on the existing LITTLEFS_FLASH_region information.
Hi, @DanielRuvalcaba
The SDK version I am using is 2.16.100, as shown in the image below.
To reproduce the situation, I performed the following steps:
Step 1
In MCUXpresso, navigate to Project properties -> C/C++ Build -> MCU Settings and allocate the TEST_LITTLEFS_region.
Step 2
In the project folder, navigate to linkscripts and add the following content to two files:
1. symbols.ldt
TEST_LITTLEFS_FLASH_START_ADDRESS = __base_TEST_LITTLEFS_FLASH_region;
TEST_LITTLEFS_FLASH_SECTOR_SIZE = 0x1000; /* 4k flash sector size */
TEST_LITTLEFS_FLASH_MAX_SECTORS = (__top_TEST_LITTLEFS_FLASH_region
TEST_LITTLEFS_FLASH_START_ADDRESS) / TEST_LITTLEFS_FLASH_SECTOR_SIZE;
2. end_text.ldt
.TEST_LITTLEFS_FLASH_region :
{
. = ORIGIN(TEST_LITTLEFS_FLASH_region) + LENGTH(TEST_LITTLEFS_FLASH_region) - 1;
} > TEST_LITTLEFS_FLASH_region
Step 3
Flash Config
Define the flash specifications and write the Test_LittleFS_config as shown in the attached test_littlefs.c file.
...../* Maximum block read size definition */#define TEST_LITTLEFS_READ_SIZE 16/* Maximum block program size definition */#define TEST_LITTLEFS_PROG_SIZE 256/* Erasable block size definition */#define TEST_LITTLEFS_BLOCK_SIZE 4096/* Block count */#define TEST_LITTLEFS_BLOCK_COUNT 1024/* Minimum block cache size definition */#define TEST_LITTLEFS_CACHE_SIZE 256/* Minimum lookahead buffer size definition */#define TEST_LITTLEFS_LOOKAHEAD_SIZE 16extern uint32_t TEST_LITTLEFS_FLASH_START_ADDRESS[];/** Name: TEST_FLASH_LITTLEFS_SECTOR_SIZE* Description: external symbol from linker command file, it represents the size* of a FLASH sector*/extern uint32_t TEST_LITTLEFS_FLASH_SECTOR_SIZE[];/** Name: TEST_LITTLEFS_FLASH_MAX_SECTORS* Description: external symbol from linker command file, it represents the sectors* count used by the ENVM storage system; it has to be a multiple of 2*/extern uint32_t TEST_LITTLEFS_FLASH_MAX_SECTORS[];static struct lfs_config Test_LittleFS_config = {.context = (void*)&Test_LittleFS_ctx,.read = test_lfs_mflash_read,.prog = test_lfs_mflash_prog,.erase = test_lfs_mflash_erase,.sync = test_lfs_mflash_sync,#ifdef LFS_THREADSAFE.lock = test_lfs_mflash_lock,.unlock = test_lfs_mflash_unlock,#endif.read_size = TEST_LITTLEFS_READ_SIZE,.prog_size = TEST_LITTLEFS_PROG_SIZE,.block_size = TEST_LITTLEFS_BLOCK_SIZE,.block_count = TEST_LITTLEFS_BLOCK_COUNT,.block_cycles = 100,.cache_size = TEST_LITTLEFS_CACHE_SIZE,.lookahead_size = TEST_LITTLEFS_LOOKAHEAD_SIZE};
.....Step 4TEST_LITTLEFS INIT
- Call the lfs_t * test_lfs_init(void) function in the test_littlefs.c file to attempt initialization.
- Call the lfs_mount function and observe that an error occurs in the return result.
Regards,
hclee.
