CC2564: CC2564 connection sleep

Daniele Comotti

Part Number: CC2564

Hi,

I'm using the PAN1326B module (based on the CC2564 chipset) with the SPP profile. Everything works fine, but I've noticed that as the SPP connection is established and there is no activity for roughly 20 seconds, the Bluetooth goes in some kind of sleep. Connection is still working fine, yet it takes about 2 seconds to recover as the link becomes active (e.g. some bytes are received). I've already tried without success to disable this through "VS_Enable_Sleep_Mode" and by commenting out the definition of SUPPORT_TRANSPORT_SUSPEND. Can anybode help me out?

Additional info: I'm using STM32F411 as MCU.

Thank you,

Daniele

over 9 years ago

0 Vihang Parmar over 9 years ago

TI__Mastermind 29361 points

Hi Daniele,

This could be caused by the sniff mode. Can you please change the following in your openstack() function to disable the sniff mode and see if this delay goes away?

Change:

            if(HCI_Command_Supported(BluetoothStackID, HCI_SUPPORTED_COMMAND_WRITE_DEFAULT_LINK_POLICY_BIT_NUMBER) > 0)
               HCI_Write_Default_Link_Policy_Settings(BluetoothStackID, (HCI_LINK_POLICY_SETTINGS_ENABLE_MASTER_SLAVE_SWITCH|HCI_LINK_POLICY_SETTINGS_ENABLE_SNIFF_MODE), &Status);

to :

            if(HCI_Command_Supported(BluetoothStackID, HCI_SUPPORTED_COMMAND_WRITE_DEFAULT_LINK_POLICY_BIT_NUMBER) > 0)
               HCI_Write_Default_Link_Policy_Settings(BluetoothStackID, (HCI_LINK_POLICY_SETTINGS_ENABLE_MASTER_SLAVE_SWITCH), &Status);

More reference can be found on this relevant thread : e2e.ti.com/.../1951268

Best regards,

Vihang

0 Daniele Comotti over 9 years ago in reply to Vihang Parmar

Prodigy 90 points

Thank you, that did work out.

Best,

Daniele

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Bluetooth forum

CC2564: CC2564 connection sleep