topic Re: K22 + KSDK 1.3 C90TFS/FTFx Driver, FlashVerifySection(...) method in Kinetis Software Development Kit

K22 + KSDK 1.3 C90TFS/FTFx Driver, FlashVerifySection(...) method

chriskeeser — Mon, 17 Apr 2017 23:02:14 GMT

I'm using a K22FN512xxx12 device (FTFA flash controller) and I am trying to make sense of the "number" parameter in the FlashVerifySection(config, dest, number, margin, commandSeq) function. The description for the parameter in the C90TFS/FTFx Driver User Manual states: "Number of alignment unit to be verified. Refer to corresponding reference manual to get correct information of alignment constrain." [sic]

Searching through the reference manual I am not able to find the relevant information (I have no idea what I am looking for). What I do know for my K22 device:

Flash size: 512 KB

Block size: 256 KB
Sector size: 2048 B

Program size: 4 B

The example application (For a K64 device) has the following code:

/* Verify section for several sector of PFLASH */
 number = FTFx_PSECTOR_SIZE/FSL_FEATURE_FLASH_PFLASH_SECTION_CMD_ADDRESS_ALIGMENT;
 for(margin_read_level = 0; margin_read_level < 0x2; margin_read_level++)
 {
   ret = FlashVerifySection(&flashSSDConfig, destination, number, margin_read_level, g_FlashLaunchCommand);
   if (FTFx_OK != ret)
   {
     ErrorTrap(ret);
   }
 }

Where 'FTFx_PSECTOR_SIZE' = 4096 (for the example K64 project) and 'FSL_FEATURE_FLASH_PFLASH_SECTION_CMD_ADDRESS_ALIGMENT' = 16 (for the example K64 project). This means number = 256 (for the example K64 project) which ... doesn't make any sense to me.

How am I supposed to calculate the number parameter for my device (MK22FN512xxx12) and what is its meaning / purpose?

Thanks for any help!

Re: K22 + KSDK 1.3 C90TFS/FTFx Driver, FlashVerifySection(...) method

Jorge_Gonzalez — Wed, 19 Apr 2017 02:30:55 GMT

Hello Chris,

The FlashVerifySection command makes use of the "Read 1s Section" command from the Kinetis Flash module. For K64 you can see in the Reference Manual that the required alignment is 16 bytes (128 bits):

With 16 x 256 = 4096 bytes you can see that the whole 4 KiB sector is verified.

For the K22FN512 the alignment would be 8 bytes (1 phrase):

Then Number is calculated as next:

Number = FTFx_PSECTOR_SIZE / FSL_FEATURE_FLASH_PFLASH_SECTION_CMD_ADDRESS_ALIGMENT;

Number = 2048 / 8;

Number = 256;

I hope this clarifies.

Best Regards!,
Jorge Gonzalez

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Re: K22 + KSDK 1.3 C90TFS/FTFx Driver, FlashVerifySection(...) method

chriskeeser — Wed, 19 Apr 2017 16:59:25 GMT

Jorge, Thank you for clearing that up.

I wish that the documentation for the driver would mention that the VerifySection() made use of the "Read 1's" command so future developers would know where to look when trying to figure out what number should be.