LAUNCHXL-CC1352P: Help needed to use connection oriented channels of L2CAP

Dnyaneshvar s

Intellectual 571 points

Part Number: LAUNCHXL-CC1352P
Other Parts Discussed in Thread: CC2651R3, CC1352P7

Tool/software:

Hello TI experts,

I am using launchpad CC1352P7 and CC2651R3.

SDK version - 7.41.0.17

I have Ble central code modified with simple serial socket code on CC1352P7 and project zero code on CC2651R3.

I am trying to implement data transfer with L2cap connection oriented channel example provided at below link

https://dev.ti.com/tirex/explore/content/simplelink_cc13x2_26x2_sdk_4_30_00_54/docs/ble5stack/ble_user_guide/html/ble-stack-common/l2cap.html#connection-oriented-channels-example

Some part of code is working,

I am getting stack events generated "L2CAP_CHANNEL_ESTABLISHED_EVT"

But when after this when I call function

// Give max credits to the other side
bStatus_t status = -1;
status = L2CAP_FlowCtrlCredit(pEstEvt->CID, 0xFFFF);
if(status == SUCCESS)
{
UART2_printf("L2CAP_FlowCtrlCredit Success");
}
else
{
UART2_printf("L2CAP_FlowCtrlCredit error=%d",status);
}

I get error code as 0x18

Please help us to resolve this problem

Thank you

Dnyaneshvar Salve

5 months ago

0 Tarek D 5 months ago

TI__Expert 4200 points

Hello Dnyaneshvar,

Thank you for reaching out! We will take a look at your issue and get back to you. It is worth mentioning that the 0x18 error code is a bleInvalidRange error (Credits is out of range). Attached is a link to our BLE5 - Stack API documentation, I believe it might prove helpful in solving your problem in the mean time.

https://dev.ti.com/tirex/content/simplelink_cc13xx_cc26xx_sdk_8_30_01_01/docs/ble5stack/ble_user_guide/doxygen/ble/html/group___l2_c_a_p.html#ga28ccf583adbf302cf95db9aef19d3b6e

Best Regards,

Tarek

0 Dnyaneshvar s 5 months ago in reply to Tarek D

Intellectual 571 points

Hello Tarek,

I have tried with lower value 0x01 as well.

status = L2CAP_FlowCtrlCredit(pEstEvt->CID, 0x1) instead of 0xFFFF but response is same

thank you,

Dnyaneshvar Salve

0 Jan 5 months ago in reply to Dnyaneshvar s

TI__Mastermind 42100 points

Hi,

Sorry for the delay. Can you clarify where you are calling that API? Inside of which event?

Best Regards,

Jan

0 Dnyaneshvar s 5 months ago in reply to Jan

Intellectual 571 points

Hello Jan,

I am calling this API after I receive the event ->

L2CAP_CHANNEL_ESTABLISHED_EVT

thank you,

Dnyaneshvar Salve

0 Jan 5 months ago in reply to Dnyaneshvar s

TI__Mastermind 42100 points

Hi,

Got it. To confirm, can you verify that the code changes outlined in the following E2E have been implemented?

https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/979706/cc2642r-ble-l2cap-coc-connection-oriented-channels-example

Best Regards,

Jan

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LAUNCHXL-CC1352P: Help needed to use connection oriented channels of L2CAP