Saving data in internal ROM of CC2650

Travis Zoucha

Other Parts Discussed in Thread: CC2650, CC1310, CC3200

Hello,

I am trying to save data into the internal ROM of the CC2650 my IDE is CCS and currently am running the TI-RTOS. This isn't a lot of data to be saved with probably a total allocation of 50 unsigned chars at the most, but the overall concept for this is the user will be able to save data into the ROM then when the CC2650 is connected to the computer the user will transfer that data to the computer then erase everything that saved in that spot of ROM. So is there a easy way to allocate and save this data into the internal ROM? I am new to the TI RTOS so being as detailed as can be would be greatly appreciated.

Thank you,

Travis Zoucha

over 8 years ago

0 Alan DeMars over 8 years ago

TI__Mastermind 30830 points

The ROM memory space is Read Only. Its contents are etched into the silicon at the time of manufacture and not changeable.

0 Travis Zoucha over 8 years ago in reply to Alan DeMars

Prodigy 40 points

What about saving to the flash rom?

0 ToddMullanix over 8 years ago in reply to Travis Zoucha

TI__Guru* 96960 points

Saving into the internal flash is fine. There are couple ways to do this.

1. Use the flash APIs in the tirtos_cc13xx_cc26xx_XX_YY_ZZ_BB_eng\products\cc26xxware_XX_YY_ZZ_BB\driverlib directory.

2. If you get TI-RTOS 2.16.00, which will be coming out within a week, you can use the preliminary NVS module in the drivers directory.

For either case, make sure to change the linker file to omit the flash you are going to use. You don't want an binary from the application (e.g. code or constants) into a flash page and then use it yourself to store data.

Todd

0 Venkateshwar Kottapalli over 8 years ago in reply to ToddMullanix

Prodigy 160 points

Hi Todd,

Thank you for your earlier response. Could you please be more specific about how to change the linker file? I am fairly new to TI-RTOS and CCS. I am trying to store data to internal flash using the new NVS drivers.

It would be great if you could provide an overview of the driver usage as well.

Thanks,
Venky

0 Venkateshwar Kottapalli over 8 years ago in reply to Venkateshwar Kottapalli

Prodigy 160 points

I am trying to achieve the same with the TT cc1310 development kit.

0 ToddMullanix over 8 years ago in reply to Venkateshwar Kottapalli

TI__Guru* 96960 points

/* The starting address of the application.  Normally the interrupt vectors  */
/* must be located at the beginning of the application.                      */
#define FLASH_BASE              0x0
#define FLASH_SIZE              0x20000
#define RAM_BASE                0x20000000
#define RAM_SIZE                0x5000

/* System memory map */

MEMORY
{
    /* Application stored in and executes from internal flash */
    FLASH (RX) : origin = FLASH_BASE, length = FLASH_SIZE
    /* Application uses internal RAM for data */
    SRAM (RWX) : origin = RAM_BASE, length = RAM_SIZE
}

The above is a snippet of the linker file for the cc1310 board from the TI-RTOS drivers examples. If you want to use part of the flash for NVS, reduce the size of the flash (e.g. 0x20000 -> 0x1f000). You can use the 0x1f000->0x1ffff memory with NVS now. For example, you can set the block in the NVSCC26XX_HWAttrs to 0x1f000.

We'll be coming out with documentation for NVS in the next release. The version in 2.16.00.08 is preliminary and subject to change. That's why we did not document the module.

Todd

0 Venkateshwar Kottapalli over 8 years ago in reply to ToddMullanix

Prodigy 160 points

Hi Todd,

Thank you for your reply. The usage of the NVS driver is not apparent to me. It would be very helpful if you could answer the following queries:
1. What are the structures/data types to be defined before using the NVS driver?
2. In which order do I call the functions like NVS_init(), NVS_open, etc?
3. Do I use the functions in NVS.h or NVSCC26XX.c?

4. Is it easier to achieve this using flash drivers?

Thanks
Venky

0 ToddMullanix over 8 years ago in reply to Venkateshwar Kottapalli

TI__Guru* 96960 points

fyi...I sent a copy of the User Guide NVS updates to Venky. These documentation updates will be in the next version of TI-RTOS.

0 Dan Bergeland over 7 years ago in reply to ToddMullanix

Prodigy 55 points

I'm trying to also use the NVS driver in TI-RTOS on the CC3200. Could I also see this documentation? I have basically the same questions about how to implement it as Venky did in the previous post.

0 Steven Connell over 7 years ago in reply to Dan Bergeland

TI__Mastermind 45025 points

Hi Dan,

If you haven't already, can you please open a new thread for the issue you are having?

Thanks,

Steve

0 Michael Liesenberg85 over 7 years ago in reply to Steven Connell

Mastermind 7560 points

Hi,

did you get it to work with CC2650 on flash rom?

i want to save a variable in flash rom so on power loss it gets saved in there.

Is there any example available?

Thanks,

Michael

0 Kenia Guinto over 7 years ago in reply to Michael Liesenberg85

TI__Expert 7250 points

Hi Michael,
We generally discourage posting a new question to an old closed thread because the person who answered before may no longer be available, and also it will allow whomever is currently assigned to monitor the forum to respond to you more quickly. For these reasons, I suggest you start a new thread with your question and reference this thread.
Thank you.

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Saving data in internal ROM of CC2650