FileX LevelX

[dsmail1]

I am having trouble integrating LevelX into FileX using the on board eMMC on the STM32H745I-DiSCO eval board. I am using standalone mode (no AzureRTOS). I have successfully implemented FileX to format, write and read the eMMC card in standalone. I am having trouble now integrating LevelX using the IOC file as a basis to generate code. When I try to format the eMMC card with the following call, it returns a status of 144.

	status = fx_media_format(&mmc_disk, fx_stm32_levelx_nand_driver, /* Driver entry */
	//                            (VOID *)CUSTOM_DRIVER_ID,
			(VOID*) 0xEEEE, mmc_memory, /* Media buffer pointer */
			sizeof(mmc_memory), /* Media buffer size */
			"EMMC_DISK", /* Volume Name */
			FX_EMMC_NUMBER_OF_FATS, /* Number of FATs */
			FX_EMMC_DIRECTORY_ENTRIES, /* Directory Entries */
			FX_EMMC_HIDDEN_SECTORS, /* Hidden sectors */
			FX_EMMC_TOTAL_SECTORS, /* Total sectors */
			FX_EMMC_SECTOR_SIZE, /* Sector size */
			FX_EMMC_SECTORS_PER_CLUSTER, /* Sectors per cluster */
			FX_EMMC_HEADS, /* Heads */
			FX_EMMC_SECTORS_PER_TRACK); /* Sectors per track */

The only difference between FileX only code that works and FileX/LevelX code that doesn't is the argument "fx_stm32_levelx_nand_driver" which I believe is required based on another Eval board's example. 

When using only FileX, the argument is fx_stm32_mmc_driver. I didn't notice any calls to LevelX low level drivers in fx_stm32_mmc_driver. Any help is appreciated !!!

THANKS!!!

[Pavel A.]

Does LevelX apply to eMMCs at all? MMCs have embedded controller which is responsible for leveling.

[dsmail1]

This application note / example mentions LevelX and so I just assumed that wear leveling was required for eMMC also.

https://community.st.com/t5/stm32-mcus/how-to-use-filex-with-emmc-for-file-system-management/ta-p/634300

[Saket_Om]

Hello @dsmail1 

According to the article mentioned above the argument for fx_media_format() is fx_stm32_mmc_driver and not fx_stm32_levelx_nand_driver.

>> I am having trouble now integrating LevelX using the IOC file as a basis to generate code.

What kind of trouble you are getting. Could you share more details please? 

[dsmail1]

Thank you. Understood. I searched the fx_stm32_mmc_driver () function and there are no API calls to any LevelX function after including the LevelX features after updating my IOC file using Cube MX. I have read that most eMMC controllers provide wear leveling w/o the need for additional firmware (the eMMC controller provides logical blocks to the firmware that map to physical blocks). I just want to make sure that I'm not missing anything given what the above example shows.

[Saket_Om · Accepted solution]

Hello @dsmail1 

You don't need Level X to write and read from EMMC. It works directly with FileX.