CC2650: BLE-STACK 2.2 Support for CC2640 & Enabling Cache as GPRAM

Vikas R J

Part Number: CC2650
Other Parts Discussed in Thread: BLE-STACK, CC2640, , SIMPLELINK-CC2640R2-SDK

Tool/software:

Hello,

We are working on a project using BLE-STACK 2.2, and we need clarification regarding CC2640 support and enabling cache as GPRAM. Below are our queries:

CC2640 Support in BLE-STACK 2.2
- We are developing on CC2650 using the Simple Peripheral example from BLE-STACK 2.2. However, there is no dedicated example for CC2640 in this SDK. since in release notes already mentioned cc2640 supported https://www.ti.com/tool/download/BLE-STACK-2-X
- Can we port the CC2650 Simple Peripheral example to CC2640? If so, what changes are required?
Enabling Cache as GPRAM in BLE-STACK 2.2
- We want to enable cache as GPRAM in BLE-STACK 2.2. Is this supported in the SDK for CC2640/CC2650? If so, how can it be enabled?
Porting to CC2640R2 & Cache as RAM Support
- As per TI expert, SIMPLELINK-CC2640R2-SDK supports enabling cache as RAM (SRAM). https://www.ti.com/tool/SIMPLELINK-CC2640R2-SDK
- Can we port our CC2650-based project to CC2640R2 and enable cache as GPRAM?
- Are there any migration guidelines or key modifications needed?

9 months ago

0 David 9 months ago

TI__Genius 16155 points

Hello Vikas,

Thanks for reaching out.

Where you able to take a look at the migration guides provided over this thread? https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/1473078/cc2650-missing-documentation-for-configuring-cache-as-gpram-in-ble-sdk-2-02-08-12
I believe the Users Guide documentation can be helpful in this matter: https://software-dl.ti.com/simplelink/esd/simplelink_cc2640r2_sdk/2.40.00.32/exports/docs/blestack/ble_user_guide/html/ble-stack-common/cache-as-ram.html

BR,

David.

0 Vikas R J 9 months ago in reply to David

Prodigy 60 points

Hi David,

Just to clarify, we are not using CC2640R2.

To migrate our project from CC2650 to CC2640, we referred to this https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/533321/migrating-code-from-a-cc2650-to-a-cc2640 .

We are using a custom CC2640 board and initially implemented our application on the CC2650 LaunchPad using the Simple Peripheral example project. The only modification we made was updating the board file. Everything is working fine—we can see advertisements, establish connections, and disconnect successfully.

Current Task:

Now, we need to enable the flash cache as GPRAM on CC2640. However, we couldn't find any relevant documentation in BLE SDK 2.02.08.12.

Questions:

Can we enable the flash cache as GPRAM on CC2640?
If so, what are the steps to enable it?

Note: A TI engineer (Jan) mentioned that CC2650 does not support reconfiguring the cache as GPRAM in this https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/1473078/cc2650-missing-documentation-for-configuring-cache-as-gpram-in-ble-sdk-2-02-08-12. However, we need confirmation on whether this applies to CC2640 as well.

Looking forward to your insights.

0 David 9 months ago in reply to Vikas R J

TI__Genius 16155 points

Hello Vikas,

Apologies for the delay. I understand that you are using the CC2640. Let me double check this with the team and come back to you today asap. So far, from the Technical Reference Manual I see it is possible to reconfigure the GPRAM to enable and disable Cache modifying the SIZE_AND_DIS_FLAGS register. However, please be aware of the impact to the CPU execution speed.

BR,

David.

Bluetooth®︎

Bluetooth forum

CC2650: BLE-STACK 2.2 Support for CC2640 & Enabling Cache as GPRAM

Current Task:

Questions: