LE Credit-Based for L2CAP Connetion-Oriented Channels - Initial Credit

[Adrian B.]

Hello,

I am working for a BLE central application where the packets are send using L2CAP Connection-Oriented Channels.
My development environment is based on nRF52 development kit, using the nRF5 SDK v17.0.0 and the SoftDevice s132.

The application was developed based on the IPSP Initiator Example (infocenter.nordicsemi.com/.../ble_app_ipsp_initiator.html) with some small changes.

Unfortunately I face up with a limitation related to the initial credit.

In my application during LE Credit Based Connection Request (LE CBCR) the initial credit is set to 1. Is there any way to increase the number of the initial credits that are sent during the LE CBCR?

Thank you!

[Simonr]

Hi Adrian

I believe you can increase the amount of initial credit by editing the amount of credits set in sd_ble_l2cap_ch_flow_control() in your application.

Best regards,

Simon

[Adrian B.]

Hi Simon,

Thanks for your reply.
I have tried by using sd_ble_l2cap_ch_flow_control(), but currently the peripheral does not handle the flow control frames (the peripheral application is in a development process) .

Therefore I supposed that it is a way to increase the number of initial credit during the Credit Based Connection Request.

Thank you.

[raccoon]

Hello Adrian,

What do you mean by "the peripheral does not handle the flow control frames"?
What will the peripheral do after the initial credits are exhausted?

[Adrian B.]

Hello,

The peripheral does not handle the flow control frames, that means it ignores the flow control frame sent by the central application.

After the initial credits have been exhausted, the peripheral's application will not send the frames to the central anymore.

This is the reason why I want to set a big number of the initial credits during the LE Credit Based Connection Request.

Thank you.