Is it possible to know whether data for a specific pipe exists in the ESB TX FIFO?

[DX_HK]

I am trying to communicate with multiple devices using ESB.
The host device must queue data in the TX FIFO as ACK data before receiving the data.
I want to keep data queued in the FIFO for multiple pipes.
In other words, I poll the FIFO to see if there is data for each pipe, and add the data to the FIFO if there is not.
However, there seems to be no direct way to know the packets in the TX FIFO.

Please tell me how to know the packets in the TX FIFO. Or, if my procedure is not correct, please tell me a better way.

[Sigurd]

Hi!

There is no such functionality implemented.

I think you would need to track yourself what you put into the FIFO in your application.

[DX_HK]

Thank you for your answer. I have an additional question.

How can I update only the data queued in a specific pipe at extremely high speed?
Specifically, I want to be able to synchronize the device with the host by continuously writing the host's timer counter to the Ack.

[Sigurd]

Maybe you could pop the last payload with nrf_esb_pop_tx(), and then write it again with the updated payload using nrf_esb_write_payload() ?

PS:

If are planning to do some wireless timer synchronization with ESB, check out this blog post:

 Wireless timer synchronization among nRF5 devices