MQX MFS Nandflash ECC Failed

[jonalvik]

I have successfully used the MFS nandflash filesystem on the Vybrid tower kit, but I am having no luck in getting it to work on our custom hardware.

Hardware have been verified using low level nand driver ()

I am using the msf_nandflash example code for testing.

First I got an assert in PageOrderMap::Init

entryCount was 512, and the comments in the code suggested that I needed to change to 16bit entries. I modified the code accordigly.

Second I get an error when trying to initialize the filesystem.

Traced it to nfc_wl.cpp, nfc_read_page_with_metadata:

/* ECC Fix FAILED */

result = NANDFLASHERR_ECC_FAILED;

I can't get past this error, have tried Changing the ECC_SIZE to 0, 4, 8

Always same result.

Nand device: MT29F16G16ADACAH4_IT

Device setup:

/* MT29F16G16ADACAH4_IT organization */

#define MT29F16G16_PHYSICAL_PAGE_SIZE   4096

#define MT29F16G16_SPARE_AREA_SIZE         224

#define MT29F16G16_BLOCK_SIZE                     262144 /* 256kB */

#define MT29F16G16_NUM_BLOCKS                  8192

#define MT29F16G16_WIDTH                               16

Bsp nand setup:

const NANDFLASH_INIT_STRUCT _bsp_nandflash_init =

{

   /* NAME                 */   "nandflash:",

#if BSPCFG_NANDFLASH_USE_DMA

   /* Low level driver     */   &_nandflash_nfc_dma_devif,

#else

   /* Low level driver     */   &_nandflash_nfc_devif,

#endif

/* NANDFLASH_INFO_PTR   */   _MT29F16G16_organization_16bit,

/* VIRTUAL_PAGE_SIZE    */                                                 540,

/* NUM_VIRTUAL_PAGES    */                                               1048576,

/* PHY_PAGE_SIZE_TO_VIRTUAL_PAGE_SIZE_RATIO */  8,

/* ECC_SIZE             */                                                            0,
/* WRITE_VERIFY         */                                                       0,

/* DEVICE_SPECIFIC_DATA */                                               0

};

Using MQX 4.1.2

/Jon

[jonalvik]

After getting a working solution and testing it several times, I now have the same error again.

The solution I found is not working anymore, and I can only guess at what sequence of events led to a working solution before.

I don't think this is related to MFS, so I created a new thread here:

Nand Flash ECC Failed

Any help is greatly appreciated

Jon

[jonalvik · Accepted solution]

Finally got a working solution!

Bsp nand setup:

const NANDFLASH_INIT_STRUCT _bsp_nandflash_init =

{

  /* NAME                */  "nandflash:",

#if BSPCFG_NANDFLASH_USE_DMA

  /* Low level driver    */  &_nandflash_nfc_dma_devif,

#else

  /* Low level driver    */  &_nandflash_nfc_devif,

#endif

/* NANDFLASH_INFO_PTR  */  _MT29F16G16_organization_16bit,

/* VIRTUAL_PAGE_SIZE    */                                                0,

/* NUM_VIRTUAL_PAGES    */                                              0,

/* PHY_PAGE_SIZE_TO_VIRTUAL_PAGE_SIZE_RATIO */  0,

/* ECC_SIZE            */                                                            0,
/* WRITE_VERIFY        */                                                      0,

/* DEVICE_SPECIFIC_DATA */                                              0

};

in platform bsp header file:

#define BSP_VIRTUAL_PAGE_SIZE   512

#define BSP_ECC_SIZE                       4

This works, but not if I set BSP_ECC_SIZE to 8 !

With 8 I get the ECC_FAILURE mentioned before.

NXP suggests ECC_SIZE 8, device datasheet suggests 8, Vybrid RM  and drivers support 8.

I think it is not good enough with ECC_SIZE 4, but at least it works.

Jon

[soledad]

Hello Jon,

Sorry for the delay, could you please try with the following configuration:

Nand device: MT29F16G16ADACAH4_IT

Device setup:

/* MT29F16G16ADACAH4_IT organization */

#define MT29F16G16_PHYSICAL_PAGE_SIZE  4096

#define MT29F16G16_SPARE_AREA_SIZE        224

#define MT29F16G16_BLOCK_SIZE                    262144 /* 256kB */

#define MT29F16G16_NUM_BLOCKS                  8192

#define MT29F16G16_WIDTH                              16

Bsp nand setup:

const NANDFLASH_INIT_STRUCT _bsp_nandflash_init =

{

  /* NAME                */  "nandflash:",

#if BSPCFG_NANDFLASH_USE_DMA

  /* Low level driver    */  &_nandflash_nfc_dma_devif,

#else

  /* Low level driver    */  &_nandflash_nfc_devif,

#endif

/* NANDFLASH_INFO_PTR  */  _MT29F16G16_organization_16bit,

/* VIRTUAL_PAGE_SIZE    */                                                540,

/* NUM_VIRTUAL_PAGES    */                                              0,

/* PHY_PAGE_SIZE_TO_VIRTUAL_PAGE_SIZE_RATIO */  0,

/* ECC_SIZE            */                                                            8,
/* WRITE_VERIFY        */                                                      0,

/* DEVICE_SPECIFIC_DATA */                                              0

};

Please let me know if this helps,
Have a great day,
Sol

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[jonalvik]

I upgraded to MQX 4.2.0.2

Still having the same issue, some help would be appreciated.

Apparently the settings for VIRTUAL_PAGE_SIZE and ECC_SIZE gets overridden by two defines in the platform bsp header file: BSP_VIRTUAL_PAGE_SIZE and BSP_ECC_SIZE

Tried changing these parameters .

At one point I had the filesystem up and running, but after erasing the flash, it failed again.

Jon

[jonalvik]

soledad​

I tried your suggestion, but get the exact same error as before.

What could be the cause for such an error?

Please provide further information / suggestions for resolving this issue.

Jon

[jonalvik]

Thank you.

I will not be able to test until thursday, will post back with my results.

Jon