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сс2564b no audio (cc2564 works!)

Other Parts Discussed in Thread: CC2564

Hello.

We are migrating from cc2564 to cc2564b on our STM32F4-based devices. For both modules we have an exact same schematics, and only one difference here is the used chips. Previously, we successfully used cc2564 to connect to the headset and to stream audio from/to the headset using TI BT module. Now, with new cc2564b chips we are unable to, the initialization procedure is the same, the module is able to discover the headset, connect to it and get the events such as Connection/Disconnection indication and other stuff.

On connection indication event I configure the cc2564b as the slave and start audio-session, but unable to get any valid PCM-data on the bus - there are only zeros. I also tried to send the sine wave to the cc2564b , but no luck again - I hear nothing from the headset.

The same code and the same headset work properly with cc2564 module, so I don't know where to dig further, do you have any tips for me?

Regarding the patches - I used that one, which is sent with STM32 TI btstack.