Zombie connection of Bluetopia in Latest v1.5R1

qinghui tang

Intellectual 590 points

Other Parts Discussed in Thread: CC2564

We are using MSP430 with CC2564 and one problem we have is that in some situation

bluetooth stack will enter a zombie status: iOS phone or android phone has disconnected from

our BLE device, but etGATT_Connection_Device_Disconnection or etLE_Disconnection_Complete event

is never triggered. Bluetooth stack still thinks itself is in connection status, and iOS phone or android phone

can no longer connect to BLE device.

If calling GAP_LE_Disconnect now, disconnect will fail with error code -502,

which is HCI_ERROR_CODE_NO_CONNECTION.

Our experiment shows this only happen when there is many advertisement packet send to BLE device,

(our BLE device use manufacturer data of advertisement packet to communicate with each other)

at the same time iOS/Android disconnecting from BLE device .

It seems somehow Bluetopia missed the disconnect event, therefor stay

in connection mode forever.

Most of the time receiving many advertisement packet and meanwhile being connected and disconnected

works fine, but when the error happens, the only solution is to reset the whole system to be able

to make BLE device reconnectable again.

This problem happens in both v1.4 and v1.5R1

http://e2e.ti.com/support/wireless_connectivity/f/538/p/313674/1093528.aspx#1093528

over 9 years ago

0 Sundeep Javvaji over 9 years ago

TI__Mastermind 32615 points

Hi,

Moving it to SSO team for precise answer

0 Stonestreet One Support over 9 years ago

Mastermind 7225 points

Hi,

Can you provide us with the terminal logs with the status for the etLE_Connection_Complete event printed when this happens? We will also need UART logs to further debug the issue.

Thanks,

Stonestreet One.

0 qinghui tang over 9 years ago in reply to Stonestreet One Support

Intellectual 590 points

I had email exchange with StonestreetOne tech support.

It seems a hardware issuse since "

For this issue, Bluetopia is not returning any error codes for GAP_LE_Advertising_Enable() or GAP_LE_Set_Advertising_Data() or GAP_LE_Advertising_Disable(). These functions directly instruct the chip

(through HCI API calls) to perform the specified action. Since the chip is responding correctly, i.e. the commands were accepted by the chip AND the chip responded with success, it appears to be a hardware issue. Please contact TI to resolve this issue as we do not have any visibility into what the chip is (or isn’t) doing.

Where should I start with to discuss the problem with TI?

0 qinghui tang over 9 years ago in reply to qinghui tang

Intellectual 590 points

Hello TI employee,

It appears to be a hardware bug of CC2564,

please let me know whom I should I contact to escalate the problem.

Thanks.

0 Sundeep Javvaji over 9 years ago in reply to qinghui tang

TI__Mastermind 32615 points

Hi,

Are you using the latest Service pack http://processors.wiki.ti.com/index.php/CC256x_Downloads

Could you please provide the reproduce steps and the Firmware logs (I have sent a mail on how to collect the logs to your ID tangqinghui@hotmail.com ), so that we will check and get back to you on this.

0 qinghui tang over 9 years ago in reply to Sundeep Javvaji

Intellectual 590 points

Hello SS1 support,

Is latest Bluetopia 1.5R1 using the latest CC2564 service pack ?

We are using TiWi-UB2 module for LST,

According to the link, the latest service pack is v2.14

http://processors.wiki.ti.com/index.php/CC256x_Downloads

0 Stonestreet One Support over 9 years ago in reply to qinghui tang

Mastermind 7225 points

Hi,

The Distribution uses 2.10 patch.

Thanks,

Stonestreet One.

0 qinghui tang over 9 years ago in reply to Stonestreet One Support

Intellectual 590 points

Hello SS1 Support,

Per TI's engineer's suggestion,

I used CC256x Bluetooth Hardware Evalution tool to generate CC256x.h file.

But the file come with Bluetopia has two patch sections:

BasePatch and LowEnergyPatch.

But the file generated by TI tool only has BasePatch,

1) Does this mean it has no change on Bluetooth Low Energy Patch?

2)Should I try with the new BasePatch and existing LowEnergyPatch ?

3) If I am only use BLE, is change in BasePatch still useful to BLE?

If not, then I don't need to run the test.

Thanks.

Qinghui

0 Sundeep Javvaji over 9 years ago in reply to qinghui tang

TI__Mastermind 32615 points

Hi,

1. No, The Base patch includes the BLE patch.

2. you don't require the LowEnergyPatch downloading lines from the code a the basePatch includes the BLE patch.

3. If you want to use just BLE and not BT, by downloading just the BLE patch, it will not work. because the base patch has some common parameters which will be required for LE.

Mind that Service pack download is just to initialize the device. As long as you don’t trigger a BLE operation or BT operation, those modules remain off.

EDIT: you can see the patches added in P2.12 and 2.14 here http://processors.wiki.ti.com/index.php/CC256x_Downloads#CC2560A.2FCC2564_-_Updated_Fixes_in_Service_Pack_2.14

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Zombie connection of Bluetopia in Latest v1.5R1