TMS320F280049: Flash API operation abnormal after security enable

Terry Deng

Part Number: TMS320F280049
Other Parts Discussed in Thread: C2000WARE

Dear

Customer report F280049 Flash API operation abnormal after device input password and enable security.

We use GPIO toggle to check the issue detail, and finally find Fapi_checkFsmForReady () function take 830ms much longer time, and Fapi_getFsmStatus() function will halt inside and never return;

If we unlock the device then Flash API every functions can run well, the abnormal only happen while enable the security.

I check the .map file and double confirm Flash API all functions are copy and run at the Ram area, and double confirm the OTP security setting that RAM and FLASH are configurate to same security zone.

Because we have not the source code for Fapi_checkFsmForReady() and Fapi_getFsmStatus(), appreciate your advice what the code inside functions will be affected by password security?

over 4 years ago

0 Terry Deng over 4 years ago

TI__Expert 3015 points

BTW, customer is using flash api function from F021_API_F28004x_FPU32.lib

0 Vivek Singh over 4 years ago in reply to Terry Deng

TI__Guru** 116021 points

Hi Terry,

Can you confirm following -

Is customer trying to do flash operation on secure sector ? If yes, are they running the Flash API from secure RAM of same zone?
Did customer programmed the flash semaphore correctly before initiating the flash operation on secure sectors ?

Regards,

Vivek Singh

0 Vamsi Gudivada over 4 years ago in reply to Vivek Singh

TI__Guru* 87155 points

Terry,

Regarding the flash semaphore (FLSEM) that Vivek mentioned, please take a look at section 3.13.3 Flash and OTP Erase/Program in TRM (https://www.ti.com/lit/ug/sprui33d/sprui33d.pdf).

Thanks and regards,
Vamsi

0 Terry Deng over 4 years ago in reply to Vivek Singh

TI__Expert 3015 points

Hi Vivek

1, Yes, customer flash api is running on secure RAM (zone 1) and program same zone FLASH (both B0/B1 are zone 1), please check the below capture.

However customer reserve RAM L6~L7 and FLASH Sect12~15 with unsecure setting (you can check OTP setting data in below), do you think if it will affect the flash API behavior?

2, we have set the FLSEM to zone 1 in the flash api init beginning, please check the below capture

The 28004x flash operation example projects in C2000ware are all without password setting, do you have a example project with security setting could give customer validation?

0 Terry Deng over 4 years ago in reply to Terry Deng

TI__Expert 3015 points

Hi Vivek

The issue is solved. thank you.

And root cause is just as you say that customer forget to set the FLSEM to zone 1. Although they write FLSEM setting in the code, actually the code do not run for some reason.

0 Vivek Singh over 4 years ago in reply to Terry Deng

TI__Guru** 116021 points

Terry,

Thank you for the confirmation.

Regards,

Vivek Singh

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280049: Flash API operation abnormal after security enable