CC2640R2F: How to set appropriate txtime value for HCI_LE_WriteSuggestedDefaultDataLenCmd() ?

Choongbeom You

Part Number: CC2640R2F

Hello,

1. Is there a calculation method for setting appropriate txtime value for HCI_LE_WriteSuggestedDefaultDataLenCmd() ?

I know the txoctets and txtime for the MTU size 27 and 251. (27/328, 251/2120).

But if I want 65 or 100 for the txoctets for example, how do I know what txtime value is appropriate? No matter between 328 and 2120?

2. The default MAX_PDU_SIZE is 69 in my project and so the max MTU size is 65 by default.

How to get the matching txtime for the 65? Could you figure it out?

Thanks,

Calvin

over 5 years ago

0 J Lindh over 5 years ago

TI__Guru 57865 points

Hi,

I am not certain I understand what you want to achieve. Could you please expand your problem statement?

0 J Lindh over 5 years ago in reply to J Lindh

TI__Guru 57865 points

Hi,

I am closing this due to inactivity. If you post again it will be reopened.

0 Eirik V over 5 years ago

TI__Guru 56590 points

For 1 Mbps I believe it is (1 + 4 + 2 + 69 +3 + 4) * 8 (bits) = ‭664‬. But simply setting to max might work as well as long as txTime duration size is more than it takes to transmit the packet with PDU size 69.

0 Choongbeom You over 5 years ago in reply to Eirik V

Expert 1670 points

Thank you, Eirik.

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CC2640R2F: How to set appropriate txtime value for HCI_LE_WriteSuggestedDefaultDataLenCmd() ?