TMS570LC4357: F021 FAPI read functionality

Hi Guillermo,

If your requirement is to just write some data to the flash and read the data from flash then FAPI's are good for your requirements.

Here is an example for FAPI usage:
4544.FAPI_TEST_LC4357.zip

1882.FAPI_TEST_LC43.zip

Or else if your requirement is to emulate EEPROM functionality in flash memory then please use FEE code.

You can find FEE example HALCoGen itself.

open help topics:

And there in examples section you can find FEE example with step by step procedure:

Or you can also refer my FEE example.

3058.FEE_TEST_LC4357.zip

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Thanks & regards,
Jagadish.

Hi Jagadish,

First thanks you for your answers. I am afraid they don't respond to my doubt so I'll try responding to you in line.

jagadish gundavarapu said:

If your requirement is to just write some data to the flash and read the data from flash then FAPI's are good for your requirements.

As I mentioned right now I am only worried about reading.(writing will come in the future).

jagadish gundavarapu said:

Here is an example for FAPI usage:
4544.FAPI_TEST_LC4357.zip

1882.FAPI_TEST_LC43.zip

Both examples are for writing so not what I was asking for. Also the examples write in the Flash Bank 7 which as I understood from the datasheet is reseved for Emulated EEPROM functionality but those examples use Fapi instead of FEE. Is there an explanation for that?

jagadish gundavarapu said:

Or else if your requirement is to emulate EEPROM functionality in flash memory then please use FEE code.

My requirement is to read Flash from Banks different than Bank 7 and I would like to do it in a reliable and most efficient way.

I would like to remark again that I am not finding a reading FSM when using Fapi.

Thanks again and kind regards.

Hi,

GUILLERMO JARA said:

Both examples are for writing so not what I was asking for. Also the examples write in the Flash Bank 7 which as I understood from the datasheet is reseved for Emulated EEPROM functionality but those examples use Fapi instead of FEE. Is there an explanation for that?

FAPI routines can be used to write data to the any bank of the flash, its not just only Bank-7 but using these routines we can write to bank-0 and bank-1 as well.

Here is an example to write Flash Bank-1:
7506.FAI_TEST_RM57.zip

It is on RM57 but the same process will be applicable for LC4357 devices.

GUILLERMO JARA said:

My requirement is to read Flash from Banks different than Bank 7 and I would like to do it in a reliable and most efficient way.

Actually, i didn't use the read functions in the application i provided but you can refer FAPI user guide to learn different read functions available and you can use them.

2845.SPNU501G.pdf

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Thanks & regards,
Jagadish.

Hi,

jagadish gundavarapu said:

Actually, i didn't use the read functions in the application i provided but you can refer FAPI user guide to learn different read functions available and you can use them.

2845.SPNU501G.pdf

Exactly, that is one of the reason of my questions in the first post:

GUILLERMO JARA said:

On one hand I have found Flash API functions like Fapi_doMarginRead() and Fapi_doMarginReadByByte() which seems what I should use. Previous to that it is stated that Fapi_initializeFlashBanks() should be called. And that is more or less everyting because no FSM is shown for the reading operation in the reference guide or at least I haven't found it (though I guess I should use something similiar to the erase/programming FSM).

To try again to make myself clearer, if for example I wanted to make writing operations following strictly and only the API documentation I don't think I would reach an equivalent code as the one proposed in the examples or the FSMs for writing proposed in the SPNA148 "Advanced F021 Flash API Erase/Program Usage". So, as I want to do simple read operations I am asking for documentation on the appropriate coding flux there should be followed to make those read operations.

Thanks again and kind regards.

Hi,

GUILLERMO JARA said:

So, as I want to do simple read operations I am asking for documentation on the appropriate coding flux there should be followed to make those read operations.

Unfortunately, there is no other document for to explain read operations other than the FAPI user guide i already given.

But i can provide you one sample code for simple read operation, here it is:

Fapi_StatusType status = Fapi_doMarginRead( (uint32_t *)addr, (uint32_t *)buffer, size, Fapi_NormalRead);

if (status == Fapi_Status_Success) {

/*Read operation success, so please perform necessary operation on read data which is present int the buffer*/

}
else
{

/*Read operation got failed, this condition should not occur check the arguments to the function properly*/

}

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Thanks & regards,
Jagadish.