Adding a unique Device Serial number

Hello Brian,

Can you provide details on how you will use the unique number? You mention a BT characteristic but not how it will be used.

Best wishes

We would like to add a unique serial number (sequential) to each manufactured device to support inventory and customer purposes

We will still have the TI unique Mac address

We want to add a 8-10 byte ascii ID (ABC0000002232)

We will serialize the device on the last manufacturing test station

We will be able to read out the serial number via either the standard device characteristic 0x2A25 or a custom characteristic

We have an on-board FRAM we could use to store the serial number

Or we could serialize the device using the Flash programmer and keep the serial number in flash memory

or can we use the SNV memory ??

Thanks
Brian

On this site there is a detailed posting on how to add a serial number to program flash space by Joshua Newth shown below

His step by step instruction is IAR based and I would like to replicate this with CCS

How do I reserve a linker space using CCS ??

What is the file name for the linker script ??

Thanks
Brian



1. I edited the link file to reserve a 16-byte space in code.

I updated my project to point to a new custom link file (in IAR, right-click on Project name > Options... > Linker > Config)
First observe that I am using a (somewhat modified) version of the hal_sleep module. The hal_sleep module reserves an 8-byte partition at the end of the 32K CODE space like so:

-D_SLEEP_CODE_SPACE_START=(_CODE_END-7)
-D_SLEEP_CODE_SPACE_END=(_CODE_END)
-Z(CODE)SLEEP_CODE=_SLEEP_CODE_SPACE_START-_SLEEP_CODE_SPACE_END

A brief explanation here: _CODE_END is 0x7FFF. _SLEEP_CODE_SPACE_START is (0x7FFF - 7) = 0x7FF8. This effectively reserves the last 8 addresses for "sleep code". The mechanics of sleep are not relevant here. I then placed my 16-byte space just before that:
-D_SERIAL_NUM_SPACE_END=(_SLEEP_CODE_SPACE_START-1)
-D_SERIAL_NUM_SPACE_START=(_SERIAL_NUM_SPACE_END-F)
-Z(CODE)SERIAL_NUM=_SERIAL_NUM_SPACE_START-_SERIAL_NUM_SPACE_END

This creates a 16-byte space starting at _SERIAL_NUM_SPACE_START computed as (((0x7FFF - 7) - 1) - 0xF) = 0x7FE8.
It is important to note that this places this reserved 16-byte space in bank 0, the root bank. Addressing this code later will be made much simpler because of this fact. In addition, the serial number will not be overwritten in a OAD update. This is a good thing.

Hello Brian,

That example is for CC254x and won't apply to CC2640.

I would suggest taking a look at how the linker is configured to store the CCFG table in the last sector. See the ccfg_appBLE.c file and the CCS linker section definition for the .ccfg section. You can define a similar structure and place it at a specific offset following this process.

Best wishes