EEPROM MQX example code for READ AND WRITE data

[sudhakarp]

Hi,

     i need EEPROM example code for FRDMK64f120 controller. am using KDS 2.0 and KSDK 1.1.0 example. so how to write and read

data from EERPOM.

thanks and regards,

sudhakar p

[Meher_Vanukuri]

Hi,

    I would like to know EEPROM example code for MIMXRT1176 for cm4 and cm7. I am using LPCXpresso54628 EEPROM code as an example. So how to read and write data from/to EERPOM.

regards,

Meher V

[Caro-Kann]

I would like to know how I can write and read an integer (uint32) in the FLASH memory of the FRDM K64 board?

I saw the example in [KDSK_1.2.0\examples\frdmk64\driver_examples\flash\mdk\flash_example_uvprojx] and it works fine.

However, I would like to do the same task using MQX. Anyone would have any ideas. Or where can I find some example with MQX?

[lwwl]

I have same question,thanks.

[sudhakarp]

hi David,

i tried this method, here i am not getting any error, but whatever data i written into the flash that data i am not getting its displaying some other data,

PROGRAM:

   uint8_t sudha_data[100]="write data";

destination = flashSSDConfig.PFlashBase + (flashSSDConfig.PFlashSize - 6*FTFx_PSECTOR_SIZE);

    ret = FlashProgram(&flashSSDConfig,destination,80,sudha_data, g_FlashLaunchCommand);   

    if (FTFx_OK != ret)

         {

             ErrorTrap(ret);

         }

     /* Read on P-Flash */

    destination = flashSSDConfig.PFlashBase + (flashSSDConfig.PFlashSize - 6*FTFx_PSECTOR_SIZE);  

    ret = FlashReadOnce(&flashSSDConfig, destination, sudha_data, g_FlashLaunchCommand);

     if (FTFx_OK != ret)

     {

         ErrorTrap(ret);

     }

      /* Message to user */

     p_data = (uint32_t *)&sudha_data;

      printf("\n\n\r---->Reading flash IFR @ location 0x%x: 0x%x", (unsigned int)destination, (unsigned int)(*p_data));

please give some solution for this..

[DavidS]

Hi Sudhakar,

Please review the flash example code:

C:\Freescale\KSDK_1.1.0\demos\flash_demo\src

Regards,

David

[sudhakarp]

Hello David,

          using that flash demo code only i edited above code. in flash example project there is no flash write operation API function. i want to write 4KB  data into flash and again i want to READ that data. can you give solution for this..? could you tell which function i want to use..?  can you give simple example code for this... just see my code also whatever previously i posted. and give some solution for this.

Thanks and regards,

sudhakar p

[sudhakarp]

hi David,

     i am waiting for your reply..

          is possible or not.? minimum 2kb data i want to write into internal flash and i want to read.

give some idea. i saw example code also but that one was not working. i mean i am doing some mistake i dnt know exact.

i tried both function

WRITE OPERATION:

1) ret = FlashProgram(&flashSSDConfig, destination, size,  program_buffer, g_FlashLaunchCommand);

2)ret = FlashProgramOnce(&flashSSDConfig,0x2,buff_data, g_FlashLaunchCommand);

READ OPERATION:

ret = FlashReadResource(&flashSSDConfig,destination,sudha_data,0x0, g_FlashLaunchCommand);

     may be i am doing mistake in "destination address". so can you edit code like 2kb data WRITE and READ from flash..

Thanks and regards,

sudhakar p

[DavidS]

Hi Sudhakar,

I think you are heading in the right direction but...

Why are you trying to write to the Flash IFR Register?

Once you issue the FlashProgram(); operation you should be able to read the Flash memory directly and not have to use a Flash Driver function call.

In the flash example code once I step over the following call (

result = FlashProgram(&flashSSDConfig, destAdrss, BUFFER_SIZE_BYTE, \

                                   buffer, g_FlashLaunchCommand);

), I can see the Memory window contents change from all F's to the programmed values shown below.

Please note that KDS/KSDK updates have been posted and I'm now using it.

Reference: New Kinetis Design Studio V3.0.0 available

Regards,

David

[sudhakarp]

Hi David,

          i need more information. using FlashProgram() i will write data its ok. but how i will read that data again..?

if i use

     ret = FlashReadResource(&flashSSDConfig,destination,sudha_data,0x0, g_FlashLaunchCommand); its showing error "halted due to flash error".  how can i read that data.

"i am writing some CONFIGURATION PARAMETER like ip address, gateway,baudrate etc., in power on condition user will configure this things using serial terminal, after user configuration i will write that data into internal flah.after device reset condition or next power on condition i want to read that data from internal flash,so user dnt want to configure again and again, whatever previous they configured i will use that parameter values "

thanks and regards,

sudhakar p

[DavidS · Accepted solution]

Hi Sudhakar,

Once the flash is programmed/written, you can read it with a pointer.

Example code....haven't tested yet as short on time today.

void *dst;

uint32_t FlashValueAtFA00;

uint32_t FlashValueAtFA04;

*((uint32_t *)&dst) = 0xFA000;;

FlashValueAtFA00 = ((uint32_t *)dst);

FlashValueAtFA04 = ((uint32_t *)dst+4);

Regards,

David

[sudhakarp]

Hi David,

          i got it. Thank you very much. i used following step

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

unsigned char *dst;

dst=0xFA000;  

     printf("\n\rDATA start\n\r");     

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

             {              

                 FlashValueAtFA00 =  *dst;

                 printf("%d",FlashValueAtFA00);

                 dst++;

             }

             printf("\n\rDATA END\n\r");

regards,

sudhakar p

[sudhakarp]

Hi David,

i tried your code but i am not getting whatever data i wrote. i included that for your reference,

destination = flashSSDConfig.PFlashBase + (flashSSDConfig.PFlashSize - 6*FTFx_PSECTOR_SIZE);

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

       {       

           program_buffer[i] = 'A';

       }

       size = BUFFER_SIZE_BYTE;  

ret = FlashProgram(&flashSSDConfig, destination, size, \

                                        program_buffer, g_FlashLaunchCommand);

         if (FTFx_OK != ret)

         {

             ErrorTrap(ret);

         }

         printf("\n\r\tSuccessfully Programmed and Verified Location 0x%x -> 0x%x", (unsigned int)destination, (unsigned int)(destination + size));

/////////////////////////////////////////////////////////////////////////////////////

       /* Read on P-Flash */

         *((uint32_t *)&dst) = 0xFA000;;

         FlashValueAtFA00 = ((uint32_t *)dst);

         FlashValueAtFA04 = ((uint32_t *)dst+4);

         printf("\n\rDATA 1=%d",FlashValueAtFA00);

         printf("\n\rDATA 2=%d",FlashValueAtFA04);

This printf function i am getting

DATA 1=1024000

DATA 2=1024016

     but i wrote "A" character at this address. can you please tell what mistake i did..?

thanks and regards,

sudhakar p

[sudhakarp]

Hi DAVID,

      here i am going to write one Structure. so i can't read long by long data. example

struct config_params

{

unsigned char ip_array[10];

unsigned char gateway_array[10];

unsigned char netmask_array[10];

}struct config_params exist_params;

struct  config_params  default_params  =

{

    "192.168.0.64",    //ip

    "192.168.0.210", ,   //gate

    "255.255.255.0",     //net

};

ret = FlashProgram(&flashSSDConfig, destination, sizeof(exist_params), \

                                       &exist_params, g_FlashLaunchCommand);

DAVID is the above method will work for flash write..?

using"flashprogram" API i will write this data into flash. but how can i recover(READ) this data..?

thanks and regards,

sudhakar p

[DavidS]

Hi Sudhakar,

Please review following example:

C:\Freescale\KSDK_1.1.0\demos\i2c_rtos\src

It contains master and slave i2c code.  I'm assuming your eeprom device has i2c interface.  Correct?

If yes, then you need to reference master i2c code.

Project locations:

C:\Freescale\KSDK_1.1.0\demos\i2c_rtos\i2c_rtos_mqx\kds\frdmk64f

Regards,

David

[sudhakarp]

Hi David,

     i want to store some data into NVM. but FRDMK64FN1MOVDC12 does not have EEPROM. so i planned to store data into flash memory. so i tried following method but i am getting error message.

char data[]="hi";

destination = flashSSDConfig.PFlashBase + PFLASH_IFR; /* Start address of Program Once Field */

     ret = FlashProgram(&flashSSDConfig, destination, sizeof(data), data, g_FlashLaunchCommand);

     if (FTFx_OK != ret)

     {

         ErrorTrap(ret);

     }

     can you give any idea to write data into the internal FLASh.

actually i want to store one "structure" into the flash. like.,

struct config_params{

    uint32_t localipaddr;     //

    uint32_t localnetmask;     //

    uint32_t gatewayaddr;     //

    uint8_t  baudrate;         //

    uint8_t  baudrate1;         //

    uint8_t  dataparams;         //

    uint8_t  dataparams1;    //

       };

give some example for "READ AND WRITE" data into the Flash.

thanks and regards,

sudhakar p