How to query connected state of a peripheral?

pixbroker

What API can be used to query the state (connected/unconnected) of a peripheral? I see the state change callback where i could keep track of it with a global variable, but was wondering if there is an API in BLE stack where this could be queried from different tasks.

Thanks.

over 9 years ago

0 Igor Sherer over 9 years ago

Guru 31280 points

Hi,

It depends on device and the framework.

For example:

In cc26xx + TI-RTOS there is an API for that while,
In cc254x + BLE stack you can read the state of some GPIO by directly accessing the corresponding register (mask specific bit),
the direct access can wrapped (usually does) with some macro or a function.

0 pixbroker over 9 years ago in reply to Igor Sherer

Genius 5820 points

Oops, sorry, should have probably mentioned this is on CC26xx with BLE Stack 2.1. Whats the API to query the state?

0 Igor Sherer over 9 years ago in reply to pixbroker

Guru 31280 points

Hi,

PINCC26XX_getInputValue

0 JXS over 9 years ago

TI__Guru** 105180 points

Hello,

For a BLE-connected peripheral, you can call linkDB_State(), see linkdb.h.

Best wishes

0 pixbroker over 9 years ago in reply to JXS

Genius 5820 points

When i call any of the API's in linkdb.h (linkDB_NumActive() for example, i get a linker error, about that symbol being undefined. Do i need to link or compile some additional files?

0 JXS over 9 years ago in reply to pixbroker

TI__Guru** 105180 points

Hi,

Does linkDB_State not work for you? It compiles cleanly for me. I thought you wanted to query the state (connected / not connected)?

Not all linkdb.h APIs are in the ICallBleAPI.c, thus they can't be called from the App if they aren't in this file. You could add them, though, then add the corresponding handler in bleDispatch.c. This is how all Stack APIs are implemented via ICall.

Best wishes

0 pixbroker over 9 years ago in reply to JXS

Genius 5820 points

Sorry JXS, i just tried one of the functions from linked.h randomly, I wasn't sure how to get the connection handle parameter needed to call linkDB_State. Where is that available from?

0 JXS over 9 years ago in reply to pixbroker

TI__Guru** 105180 points

Our guidance is to keep track of the connection handle in your App. This will minimize overall flash usage as well.

Best wishes

0 pixbroker over 9 years ago in reply to JXS

Genius 5820 points

Where in SimpleBLEPeripheral would be the place to grab the connection handle and store it? Thank you.

0 JXS over 9 years ago in reply to pixbroker

TI__Guru** 105180 points

GAPRole_GetParameter(GAPROLE_CONNHANDLE)
It's also sent in the conn established event sent to the GAPRole task (peripheral.c).

Best wishes

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How to query connected state of a peripheral?