HALCoGen FEE example: I only get 8 values back from memory

Jan Cumps

Guru 15740 points

Other Parts Discussed in Thread: HALCOGEN, TMS570LS1224

I have used the HALCoGen FEE example example_TI_Fee_Write_Read .

I have a question about reading from memory:

The example creates an array of 100 values and writes it to flash memory using TI's F021 Flash API.

Half way the example, it reads the values back into RAM.

I seem to only get 8 values back from the 100 values that were written into Flash.

I used the example from HalCoGen - > Help -> Examples -> example_TI_Fee_Write_Read
(followed the instructions in HALCoGen help, and took source from HALCoGen's help folder)

I've tried this on two Hercules controllers; the TMS570LS04x and RM46x.

This is the result I get in the 'read_data' variable:

8 values are read back as expected, but the previous lines of code wrote 100 values.

The source code can be viewed by starting HALCoGen, go to Help -> Help Topics

Navigate to: Examples -> example_TI_Fee_Write_Read.c

One of my fellow e2e mebers, Martin Valencia, detected the issue, and I can replicate it on two controllers.

Very likely, we understand the fee driver and Flash API wrong. It would be great if you could point us to the right direction.

over 9 years ago

0 Martin Valencia over 9 years ago

Guru 15175 points

this occurs when i plot the data vector "read_data"

0 Martin Valencia over 9 years ago in reply to Martin Valencia

Guru 15175 points

the plotter, interprets the vector contains random data recorded, the plotter is not wide but generates this type of graph, as I understand this means that not only has 7 data but is full of data that are not visible to the debugger of CCS

0 Chuck Davenport over 9 years ago

TI__Guru 59540 points

Hi Jan,

I have forwarded your question to our FEE driver expert. He should be able to provide more FEE specific support. However, there may be an issue with one or more of the device specific XMLs used by CCS to identify device configuration. Which version of CCS are you using so I may check it?

0 Jan Cumps over 9 years ago in reply to Chuck Davenport

Guru 15740 points

Chuck,

here are my version numbers:

CCS: 6.0.1.00040 - all modules up to date to latest version

HALCoGen: 04.02.00 - (also the source code used in the project is file example_TI_Fee_Write_Read.c coming from this HALCoGen version)

F021 Flash API version 02.01.01

Tested on the following hardware:

Hercules LaunchPad Type1 with TMS570LS04, with XDS100v2
Hercules LaunchPad Type 2 with RM46x with XDS110

Regards,

0 Vishwanath Reddy over 9 years ago in reply to Jan Cumps

TI__Mastermind 18995 points

Hi Jan,

The FEE example shown in HALCoGen writes only 8 bytes and hence you observe read API also reads only 8 bytes.

SpecialRamBlock[100] is a RAM array and is not the actual block size. You can see block size in Fee_BlockConfiguration[ ] in ti_fee_cfg.c file. You can configure required block size in FEE Block Configuration tab under FEE tab.

0 Martin Valencia over 9 years ago in reply to Vishwanath Reddy

Guru 15175 points

Thank you very much, if it worked properly, was a fact that I had in mind!

0 Jan Cumps over 9 years ago in reply to Vishwanath Reddy

Guru 15740 points

Makes sense, I'm checking it.
I may have misinterpreted that the example was writing the whole 100 values of the array, while it wasn't...

0 Martin Valencia over 9 years ago in reply to Martin Valencia

Guru 15175 points

was a fact that I not had in mind! XD

0 Martin Valencia over 9 years ago in reply to Vishwanath Reddy

Guru 15175 points

a question, what is the limit of data that can be written per block?

0 Jan Cumps over 9 years ago in reply to Vishwanath Reddy

Guru 15740 points

Yes, confirmed that this was the issue. Both Martin and myself see that it's working when we set the appropriate size in HALCoGen.
Thanks for helping us out.

0 Jan Cumps over 9 years ago in reply to Vishwanath Reddy

Guru 15740 points

An afterthought:

Maybe consider to add these instructions to increase the Block Size on the FEE Block Configuration tab to 100 in a future HALCoGen release,

together with a picture similar to this:

It can make the example more intuitive - showing the link between configuration HALCoGen and what's happening when the the API is called.

It would make the example a tad richer.

0 David Sabol over 9 years ago in reply to Jan Cumps

Genius 4850 points

Hi,

This has been very helpful getting the FEE example working and I can see in the read data array the correct values. However, I went to look at flash through the memory browser, and I can't see the data in flash. I thought it is supposed to write to bank 7, which at least for the TMS570LS1224 starts at address 0xF0200000, but the memory is all F's.

Am I looking in the wrong spot?

Thanks,
David

0 Chuck Davenport over 9 years ago in reply to David Sabol

TI__Guru 59540 points

Hi David,

This may simply be an issue with the memory map in one of the xmls or in the gel file. Can you tell me what version of CCS and what device you are using?

0 David Sabol over 9 years ago in reply to Chuck Davenport

Genius 4850 points

Hi Chuck,

I'm using CCS 6.0.1 with the TMS570LS1224PGE

Thanks,
David

0 Vishwanath Reddy over 9 years ago in reply to David Sabol

TI__Mastermind 18995 points

Hi David,

The FEE example in HALCoGen also calls TI_Fee_Format API which erases all flash banks. If you want to check FEE bank after writing data, put a break point before the call of TI_Fee_Format API.

0 David Sabol over 9 years ago in reply to Vishwanath Reddy

Genius 4850 points

Hi,

I do see it in memory now, I see it at address 0xF0200038, and not the start of bank 7, 0xF0200000, which is part of what caused my confusion.

[Edit] What is the data at the beginning of the flash bank 7? It changes as I do writes, but it isn't my data. I'm assuming it's configuration related, but wanted to check.

Thanks,
David

0 Vishwanath Reddy over 9 years ago in reply to David Sabol

TI__Mastermind 18995 points

Hi David,

The data at 0xF0200000 is the sector management data. This is required by FEE driver to manage configured sectors, copy data from one sector to another, erase the sector and so on.

0 Jose Inesta over 8 years ago in reply to Jan Cumps

Prodigy 60 points

thank you Jan Cumps, your answer helped me a lot with a similar problem in a plotter controller. Thanks!

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HALCoGen FEE example: I only get 8 values back from memory

Thank you very much, if it worked properly, was a fact that I had in mind!