CC2652RSIP: Changing passcode

OOMAR

Prodigy 130 points

Part Number: CC2652RSIP

Dear Team;

I want to chage passcode with data which is coming from uart.

Is there any simple project like that?

Best Regards.

over 4 years ago

0 Ammar N over 4 years ago

TI__Mastermind 25810 points

Hey Oomar,

Can you provide some additional context on your request?

If you are using a Bluetooth LE example such as simple_peripheral, you can follow the code inside simple_peripheral.c and find the SimplePeripheral_processPasscode function. Here you see we have a predefined passcode that is being passed in to the function GAPBondMgr_PasscodeRsp. You can simply replace the define with a dynamic variable that you update with the data from UART.

Keep in mind, the security of the UART channel when it comes to system design will need to be considered here if this is a concern. You are sharing a passcode over UART, and if the UART channel is vulnerable, then there is a potential this vulnerability gets exploited in the connection as well.

0 OOMAR over 4 years ago in reply to Ammar N

Prodigy 130 points

Hello

I am using "simple_serial_socket_client" project.

How I may adapt that function (GAPBondMgr_PasscodeRsp) for my project.

Best Regard.

0 Ammar N over 4 years ago in reply to OOMAR

TI__Mastermind 25810 points

Here's a link to our Security fundamentals SimpleLink Academy module, take a look at Task 3.

Additionally, you can visit our User's Guide section on this here: https://software-dl.ti.com/simplelink/esd/simplelink_cc13xx_cc26xx_sdk/5.40.00.40/exports/docs/ble5stack/ble_user_guide/html/ble-stack-5.x/gapbondmngr-cc13xx_cc26xx.html

0 OOMAR over 4 years ago in reply to Ammar N

Prodigy 130 points

Hello;

I activated passcode, now I am trying to change it with data which is coming from uart.

Any suggestion?

Best Regards.

0 Ammar N over 4 years ago in reply to OOMAR

TI__Mastermind 25810 points

To change the passcode, you just have to pass in the new passcode as a parameter in GAPBondMgr_PasscodeRsp.

If you want to change the passcode after a device has already paired/bonded with a peripheral, I would recommend disconnecting from the device (as well as removing the bond information locally) to restart the pairing/bonding process with the new passcode.

0 OOMAR over 4 years ago in reply to Ammar N

Prodigy 130 points

Hi;

Thank you for your suggestion, I have done.

I need an internal flash read and write example to save passcode.

Is there any simple internal flash example without NVS?

Best Regards.

0 Ammar N over 4 years ago in reply to OOMAR

TI__Mastermind 25810 points

Hey Oomar,

You can use a pragma statement if you'd like to store variables without NVS. If you need to write, you must place the passcode in RAM and not in Flash. Here's an example, but the address used is placed in flash, so this must be changed: https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/1004417/cc2650-simple_peripheral-serial-number-using-flash-programmer/3741494#3741494

Otherwise, I recommend using NVS to store the passcode. See this related thread for more details on how to: https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/986551/cc2642r-non-volatile-memory

0 OOMAR over 4 years ago in reply to Ammar N

Prodigy 130 points

Hey Ammar;

Are you sure that ram have capable of non-volatile storing.

I writed codes below. When I restarted chip, passcode is erased.

#define APP_SERIAL_ADDRESS (0x400E0000)        //AUX_RAM 0x400E 0000
#pragma RETAIN(Psw)
#pragma LOCATION(Psw, APP_SERIAL_ADDRESS)

uint32_t Psw = 123456;

Best Regards

0 Ammar N over 4 years ago in reply to OOMAR

TI__Mastermind 25810 points

Hey Oomar,

The address you selected is actually auxiliary RAM used by the sensor controller. See the memory map section of our User's Guide.

The top of RAM is used for the interrupt vector table and TI-RTOS pointers. I would refer to the generated .map file to find an address that works for your application.

0 OOMAR over 4 years ago in reply to Ammar N

Prodigy 130 points

Hey Ammar,

.map data are below, I try to SRAM section to save data.

(20000fe0, 200026e9, 200026f0, 20013c00) adresses wil be tried,

When chip reseted, data is ereased.

Any help?

MEMORY CONFIGURATION

         name            origin    length      used     unused   attr    fill
----------------------  --------  ---------  --------  --------  ----  --------
  FLASH                 00000000   00056000  0001ef5a  000370a6  R  X
  FLASH_LAST_PAGE       00056000   00002000  00000058  00001fa8  R  X
  RTOS_SRAM             20000000   0000012c  000000e4  00000048  RW X
  SRAM                  20000fdf   00013021  000028e6  0001073b  RW X


SEGMENT ALLOCATION MAP

run origin  load origin   length   init length attrs members
----------  ----------- ---------- ----------- ----- -------
00000000    00000000    0001af60   0001af60    r-x
  00000000    00000000    0000003c   0000003c    r-- .resetVecs
  0000003c    0000003c    0001878c   0001878c    r-x .text
  000187c8    000187c8    0000208e   0000208e    r-- .const
  0001a858    0001a858    00000144   00000144    r-- .rodata
  0001a9a0    0001a9a0    000005c0   000005c0    r-- .cinit
00048000    00048000    00004000   00000000    rw-
  00048000    00048000    00004000   00000000    rw- .TI.bound:flashBuf0
00057fa8    00057fa8    00000058   00000058    r--
  00057fa8    00057fa8    00000058   00000058    r-- .ccfg
20000100    20000100    0000000c   00000000    rw-
  20000100    20000100    00000004   00000000    rw- .data:xdcRomConstPtr
  20000104    20000104    00000004   00000000    rw- .data:xdcRomExternFuncPtr
  20000108    20000108    00000004   00000000    rw- .data:xdcRomStatePtr
20000fe0    20000fe0    000024e6   00000000    rw-
  20000fe0    20000fe0    00001709   00000000    rw- .data
  200026f0    200026f0    00000dd6   00000000    rw- .bss
20013c00    20013c00    00000400   00000000    rw-
  20013c00    20013c00    00000400   00000000    rw- .stack

0 Ammar N over 4 years ago in reply to OOMAR

TI__Mastermind 25810 points

Hey Oomar,

This is expected behavior of saving to RAM, my apologies for not missing this as a requirement.

OOMAR said:
When chip reseted, data is ereased.

This is precisely what NV is for. Is there a particular reason you do not wish to use NVS? There is an example of this in our User's Guide here: https://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/4.40.04.04/exports/docs/ble5stack/ble_user_guide/html/ble-stack-common/flash_memory-cc13x2_26x2.html#id4

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CC2652RSIP: Changing passcode