CC2564MODA: DUAL SCO/ESCO problem

Alessandro Centofante

Part Number: CC2564MODA

Hello

I have 3 custom cards, which mount CC2564MODA + MSP432 + AIC3254.
Bluetopia Libraries v4.0.3 + Patch v1.8.

App: Full Duplex Audio
Connection via L2CAP.

Currently I was able to use 2 SCO links at the same time on the same board with this configuration:

LinkType = ltSCO;
TransmitBandwidth = 8000;
ReceiveBandwidth = 8000;
MaxLatency = 20;
DataFormat.SCO_Air_Encoding_Type = aeCVSD;
DataFormat.SCO_Data_Encoding_Format = ef1sComplement;
DataFormat.SCO_Data_Encoding_Type = deLinearPCM;
DataFormat.SCO_PCM_Data_Sample_Size = ds8Bit; // or ds16Bit
RetransmissionEffort = reNoRetransmissions;
PacketTypes = HCI_PACKET_SCO_TYPE_HV3;

I tried to modify the parameters written above, the first connection is successful, but the second one returns the SCO_INTERVAL_REJECT error.

My idea, if possible, is to use a double ESCO.

Could anyone please tell me which parameters to use?

Or if I'm forgetting something, would you kindly tell me what, or where to go to check?

Thanks in advance

Alessandro

over 6 years ago

0 Hari Nagalla over 6 years ago

TI__Mastermind 27470 points

Seems, like some Bandwidth rule violation. Can, you please take Firmware logs with a logger and send them to us.

https://processors.wiki.ti.com/index.php/CC256x_Logger_User_Guide

Please, make sure the HCI/LMP viewer is also enabled.

Thanks

0 Alessandro Centofante over 6 years ago in reply to Hari Nagalla

Prodigy 80 points

Thank you for reply.

FW logs (sco ok and esco reject) in the zip file.

examples configurations tested:

LinkType = ltESCO;
TransmitBandwidth = 8000;
ReceiveBandwidth = 8000;
MaxLatency = 100;    //or 20
DataFormat.SCO_Air_Encoding_Type = aeCVSD;
DataFormat.SCO_Data_Encoding_Format = ef1sComplement;   //or ef2sComplement
DataFormat.SCO_Data_Encoding_Type = deLinearPCM;
DataFormat.SCO_PCM_Data_Sample_Size = ds16Bit;
RetransmissionEffort = reRetransmitOptimizeLinkQuality;   //reNoRetransmissions;
PacketTypes = HCI_PACKET_SCO_TYPE_EV3;

Let me know if you need any others log or details.

Thanks in advance

AlessandroLogDual.zip

0 Hari Nagalla over 6 years ago in reply to Alessandro Centofante

TI__Mastermind 27470 points

Did, you try with "no retransmission effort"?

Thanks

0 Alessandro Centofante over 6 years ago in reply to Hari Nagalla

Prodigy 80 points

Yes, same error.

0 Alessandro Centofante over 6 years ago in reply to Alessandro Centofante

Prodigy 80 points

I found the problem, it seems to be that the max latency value was wrong, with 12 it works both sco and esco.

Is there a function that allows me to limit a maximum of 2 sco connections instead of 3?

Thanks

0 Hari Nagalla over 5 years ago in reply to Alessandro Centofante

TI__Mastermind 27470 points

Good to hear that.. A max of 2 SCO connections are supported. Please check CC2564B datasheet.

Thanks

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CC2564MODA: DUAL SCO/ESCO problem