RTOS/CC2650: SDI documentation - SPP-LE example

Luis Afonso

Guru 20670 points

Part Number: CC2650
Other Parts Discussed in Thread: CC2640

Tool/software: TI-RTOS

Hello,

I have started to use the CC2650 very recently. I am trying to understand the SPP-LE example since it's what I mostly need.
The example works fine between 2 launchpads, still haven't been able to use with computer/android because it doesn't create a COM, but that's an issue for later.

In trying to understand everything, most seems to be documented in CC2640 and CC2650 SimpleLink™ Bluetooth® low energy Software Stack 2.2.1. So, although I don't quite understand everything, since it's explained I will try to avoid asking questions here. But there is one thing that I can't find, and that is the SDI transport layer.
I'm trying to understand where the UART is configured, how message is received, processed, redirected to APP task, etc. One of the things I will need to do for example, is change some configs on the UART if requested (by a GPIO, BLE custom command, etc).

I've been trying to understand by reading the source codes but everything is a bit convoluted and the additions to TIRTOS abstraction (ICAL, util, etc) makes it more confusing since I never seen it before.
So my question is, is there any documentation on the SDI?

Help is appreciated

over 8 years ago

0 Luis Afonso over 8 years ago

Guru 20670 points

Another thing. I decided to try out the ROV since I didn't find info in the created HWI and SWI and found out something weird.

When running the server SPP-LE example there were only 4 tasks.

It seems it's the Idle, App, GAPRole and ICAL due to their priority levels. So where is the SDI task?

There seems to be a SWI and HWI for the UART and that's it.

0 YiKai Chen over 8 years ago

Guru 735695 points

Hi Luis, you can try to read SWRU393_CC2640_BLE_Software_Developer's_Guide.pdf to know more about fundamental of BLE Stack for CC26xx.

0 Luis Afonso over 8 years ago in reply to YiKai Chen

Guru 20670 points

Hi Yikai, (weird didn't get email notification. must check)

Thanks, but I didn't find anything there about the SDI. About the BLE Stack for the CC26xx, yes it's a very good document, been learning a lot from it.

0 YiKai Chen over 8 years ago in reply to Luis Afonso

Guru 735695 points

There is no specific document to describe SDI. You can only find a few word mentioned in www.ti.com/.../tidu997a.pdf . I can only suggest you to look into source code to know more details.

0 Luis Afonso over 8 years ago in reply to YiKai Chen

Guru 20670 points

The code is a bit complex, and running RTOS makes it hard to understand how the SDI works but I will try.

The weird part is that it doesn't seem show up as a task in the ROV (that or the stack task doesn't show up since it's in a different image)

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RTOS/CC2650: SDI documentation - SPP-LE example