Quick switch between TX and RX in nrf51822 proprietary

RE: Quick switch between TX and RX in nrf51822 proprietary

ovrebekk — Fri, 15 Jun 2018 08:57:56 GMT

Hi Chianglin

In that case I agree using ACK payloads is probably a bit impractical.

Unfortunately the only safe way to change between PTX and PRX mode is to disable and re-init ESB.
Most applications don't have to change between the two, and we haven't tested what would happen if you were to start the RX mode after initializing ESB in PTX mode.

It should be possible to improve ESB to support a more dynamic switching between PTX and PRX modes, and I have requested this internally, but I don't know when we will be able to implement it unfortunately.

For the time being you would have to stick to the slow method.

I am a bit surprised the init takes such a long time. Have you measured this?

Best regards
Torbjørn

RE: Quick switch between TX and RX in nrf51822 proprietary

chianglin — Thu, 14 Jun 2018 15:26:25 GMT

Hi Torbjørn,

Thank you four your answer.

I had study the ESB manual, but the PRX can only embed data in ACK and send to PTX site.

For example, if PRX had receive one packet and the packet need forward to other node, then I need change current PRX node to PTX mode. After send packet to other node, the current node need change back to PRX mode, so it can listen packet.

What is the fastest way to change between PTX and PRX?

Thank you,

Chianglin

RE: Quick switch between TX and RX in nrf51822 proprietary

ovrebekk — Thu, 14 Jun 2018 09:08:42 GMT

Hi Chianglin

The idea behind the ESB protocol is to use the built in ACK feature to send data from the PRX to the PTX, rather than having to manually switch modes.

By default the PRX will send an ACK packet after each packet received from the PTX, and you can embed data in this ACK if you want.

Have you looked into using this method to achieve bidirectional communication, or is there some reason this method is not suited for your application?

Best regards
Torbjørn