DTM with CC2541 / BLE Stack 1.4.0: Num_HCI_Command_Packets is always zero

Oliver Birnfeld

Other Parts Discussed in Thread: CC2541, CC2540

Dear list members,

we developed a board with the CC2541 using BLE Stack 1.4.0. For the Bluetooth qualification we need samples which has to support DTM for use with the R&S CBT. To speed things up we decided to use the HostTestRelease firmware for the testing instead of implementing PTM/DTM in our firmware. So far things are working fine except one detail: When sending a command to the device e.g. HCI_LE_Receiver_Test

01 1D 20 01 00

the corresponding Command Complete Event looks like

04 0E 04 00 1D 20 00

with always Num_HCI_Command_Packets=0. This is true for every HCI LE command I tested.

The people from the test laboratory are now claiming that this will not work with the CBT which expects Num_HCI_Command_Packets=1.

This is similar to this thread: http://e2e.ti.com/support/wireless_connectivity/f/538/t/308827.aspx

Is this a bug in BLE Stack 1.4.0? Is there someone who has an idea for a workaround or experiences with the CBT and DTM on CC254x? Every help is highly appreciated!

Regards,
Oliver

over 10 years ago

0 Eirik V over 10 years ago

TI__Guru 56590 points

Hello Olivier,

I have verified this behavior in the 1.4.0 version of the stack. You can try the following as a fix for now and see if that works for you:

In the OSAL_HostTest.c file add the following external as a global variable:

extern uint8 hciCtrlCmdToken;

Then right after "HCI_Init( taskID++ );" in the osalInitTasks function initialize the variable to 1:

hciCtrlCmdToken = 1;

0 Oliver Birnfeld over 10 years ago in reply to Eirik V

Prodigy 95 points

Hello Eirik,

this works like a charme! Thanks a lot!

Regards,
Oliver

0 Richard Phillips over 9 years ago in reply to Eirik V

Prodigy 125 points

Hello Eirik,

I am also seeing this problem with 1.4.0 running on a CC2540. Will this be fixed in a future release of the BLE stack, and do you have any idea when that will be available?

Regards,

Richard.

0 Richard Phillips over 9 years ago in reply to Eirik V

Prodigy 125 points

Hello Eirik,

If I just ignore the incorrect value of Num_HCI_Command_Packets being returned (i.e. override it in my application), would the BLE stack (1.4.0) operate correctly? Or does it *need* your modification to work correctly?

Regards,
Richard.

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DTM with CC2541 / BLE Stack 1.4.0: Num_HCI_Command_Packets is always zero