A3DP Automatic reconnection

Hi,

In general this is done by the source, If you want to do it from the sink, You need to tweak it a little.

like for example : you can keep initiating the connection (in a loop until it is successful) for that specific device or continuously scan and compare the found device DB address with the ones you have saved and If it matches, stop inquiry and initiate connection

I am looking around on how to do this in A3DP. Inquiring is not the problem, and also knowing which host to connect to is no problem. My problem is in finding how to initiate a connection as a client.

I have found the HIDDemo, this demo is able to connect to a host while being a slave itself.
processors.wiki.ti.com/index.php;keyMatch=HIDDemo&tisearch=Search-EN-Everything

It uses a function "HID_Connect_Remote_Host()" to do this. However this is a HID function, and I cannot find anything comparable for the A3DP.

How to do this? Is there any documentation I might be missing?

Hi,

You can try: AUD_Open_Remote_Stream() - This API is available in the A3DPDemo_SRC. I don't see any reason why it wouldn't work with the A3DPDemo_SNK case as well - Just use the StreamType as "astSNK".

Regards,
Gigi Joseph.

That helped a bit.

Now the bluetooth device is able to connect, this is a big step already :)

Now AUD_Event_Callback() gets called with event "etAUD_Stream_Open_Confirmation".

I put in the following code there:


case etAUD_Stream_Open_Confirmation:
BD_ADDRToStr(AUD_Event_Data->Event_Data.AUD_Stream_Open_Confirmation_Data->BD_ADDR, Callback_BoardStr);
Display(("etAUD_Stream_Open_Confirmation\r\n"));
Display(("Status: %u\r\n", AUD_Event_Data->Event_Data.AUD_Stream_Open_Confirmation_Data->OpenStatus));
Display(("BD_ADDR: %s\r\n", Callback_BoardStr));

if(AUD_Event_Data->Event_Data.AUD_Stream_Open_Confirmation_Data->OpenStatus == AUD_STREAM_OPEN_CONFIRMATION_STATUS_SUCCESS)
{
Display(("MediaMTU: %d\r\n", AUD_Event_Data->Event_Data.AUD_Stream_Open_Confirmation_Data->MediaMTU));
Display(("StreamType: %s\r\n", (AUD_Event_Data->Event_Data.AUD_Stream_Open_Confirmation_Data->StreamType == astSRC) ? "SRC" : "SNK"));

OpenA3DPStream(AUD_Event_Data->Event_Data.AUD_Stream_Open_Confirmation_Data);
//OpenA3DPStream(AUD_Event_Data->Event_Data.AUD_Stream_Open_Indication_Data);
}
else
{
Display(("Connection to %s failed.\r\n", Callback_BoardStr));

This is also copied from the SRC code. It was a lucky guess to put this in there, but it is not working completely. The bluetooth connection is made with the phone, but when I play sounds that should go to the SINK application, it is not being played. The phone does send it I think, because it has muted its speaker. Should I configure the codec there, or am I doing something wrong?

I would like to have some documentation on this, it is quite difficult to figure out how it _should_ work.

Hi,

Have you also modified the A3DPSNK::OpenA3DPStream() method? It takes: "AUD_Stream_Open_Indication_Data_t" structure. From your call, it looks like you are passing the "AUD_Stream_Open_Confirmation_Data_t" structure.

Can you show me some logs from the SNK - OpenA3DPStream() implementation?

Regards,
Gigi Joseph.