TMS320F28035: about password lock using CSM - Can I assign uninitialized data sections to unsecure ram(RAMM0)?

sai charan piduru

Prodigy 110 points

Part Number: TMS320F28035

Dear friends,

I've to lock the device using CSM before shipping it out.

The problem currently i'm facing is about usage of RAMM0 for uninitialized data assignment in linker file.

There is no info available in Ti literature about secure code accessing unsecure RAM locations.

Will it break anything when I apply the lock?

over 7 years ago

0 Vivek Singh over 7 years ago

TI__Guru** 113755 points

Sai,

Unsecure RAMs can be accessed from code running from secure RAM. There is no restrictions and should not break anything after enabling the security.

Regards,
Vivek Singh

0 sai charan piduru over 7 years ago in reply to Vivek Singh

Prodigy 110 points

Hi Vivek,

Thank you for the reply,

Can you please tell me if you foresee any problem in assigning ".stack" and ".cio" sections to RAMM1 or RAMM0 (unsecured RAM portions) with CSM lock to be enabled?

0 Vivek Singh over 7 years ago in reply to sai charan piduru

TI__Guru** 113755 points

Sai,

From functionality point of view, I do not see any issue.

Regards,
Vivek Singh

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28035: about password lock using CSM - Can I assign uninitialized data sections to unsecure ram(RAMM0)?