topic Re: saving data on KL43Z in ROM or FLASH during runtime in Kinetis Microcontrollers

saving data on KL43Z in ROM or FLASH during runtime

thiagopalmieri — Fri, 29 May 2015 16:37:24 GMT

Hello,

I have a project that need to persist some data (1 or 2 bytes) during restarts/reboots/resets. It is a configuration information that can be changed during runtime by the user.

Is it possible to share the booitloader ROM space for that or use the flash?

If so, is there any application note or example code that I can look at?

Thanks

Re: saving data on KL43Z in ROM or FLASH during runtime

mjbcswitzerland — Fri, 29 May 2015 21:10:45 GMT

Any Flash sector can be used to save updateable parameters to (as long as the same sector is not used for code).

See http://www.utasker.com/docs/uTasker/uTaskerFileSystem_3.PDF

See also µTasker FRDM-KL43Z support - parameters can be modified and saved to Flash using the command line menu.In the "I/O menu" flash reads, writes and deletes can be experimented with.

Regards

Mark

Kinetis: µTasker Kinetis support

KL43: µTasker FRDM-KL43Z support / µTasker TWR-KL43Z48M support

For the complete "out-of-the-box" Kinetis experience and faster time to market

Re: saving data on KL43Z in ROM or FLASH during runtime

Hui_Ma — Tue, 02 Jun 2015 03:36:05 GMT

Hi,

Please download C90TFS_FLASH_DRIVER(TFS Flash Driver Software for Kinetis and ColdFire+ MicroControllers) from here, which includes the KL46 product Flash erase/program operation (customer could refer to storage some data to Flash memory).

Wish it helps.

Have a great day,
Ma Hui

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Re: saving data on KL43Z in ROM or FLASH during runtime

thiagopalmieri — Tue, 02 Jun 2015 17:39:34 GMT

Hello Hui_Ma,

Thank you very much.... I have tried your driver and it works great !!

Regards,

Thiago

Re: saving data on KL43Z in ROM or FLASH during runtime

thiagopalmieri — Tue, 02 Jun 2015 18:45:53 GMT

Just one last question, how do I read back the data stored ??

Do I use FlashReadResource ??

Re: saving data on KL43Z in ROM or FLASH during runtime

Hui_Ma — Wed, 03 Jun 2015 01:02:54 GMT

Hi,

Read data from Flash memory just like read a data from a dedicated address, please refer below code as an example:

//from flash address 0x1000, read 16 bytes back

destination = 0x1000; // flash address 0x1000

#define BUFFER_SIZE_BYTE 0x10

UINT32 programvalue[BUFFER_SIZE_BYTE];

for (i = 0; i<BUFFER_SIZE_BYTE; i=i+4)

{

programvalue[i] = *((UINT32 *)(destination+i)) ;

printf("\n programvalue[%d] = 0x%4x \n", i, programvalue[i]);

}

Wish it helps.

Have a great day,
Ma Hui