When can change to RX mode while a packet sent out?

RE: When can change to RX mode while a packet sent out?

Hung Bui — Wed, 18 Oct 2017 09:28:41 GMT

Do you have the receiver running in RX all the time ? Or it's also a TX+RX device ?

Can you provide a small example showing the issue that I can test here ?

RE: When can change to RX mode while a packet sent out?

pengyong — Wed, 18 Oct 2017 00:55:01 GMT

Hi Hung Bui,

My understanding from the Product Specification was same to your mention.In fact according to the testing , switching from TX to RX when the TX_DS received, the receiver can not get the packet correctly.400-500us need after the TX_DS received to switching TX to RX. I am not sure what is wrong. Thanks.

Peng Yong

RE: When can change to RX mode while a packet sent out?

Hung Bui — Tue, 17 Oct 2017 11:45:03 GMT

Hi pengyong,

To switch from TX to RX, you can wait for TX_DS and then change mode, the minimum time to switch is 130us (PLL settling delay). Have you measured your implementation and find how long it would take ?

RE: When can change to RX mode while a packet sent out?

pengyong — Tue, 17 Oct 2017 00:53:05 GMT

Hi Hung Bui, nRF24l01+ was used with NO auto ACK to get higher throughput. In my application, the nrf24l01+ will sent 4 packets and then receive 2 packet. My question is how to get higher performance from PTX to PRX or PRX to PTX. Thanks.

RE: When can change to RX mode while a packet sent out?

Hung Bui — Mon, 16 Oct 2017 13:27:19 GMT

Hi Pengyong,

It's not very clear what your application does. Please give more information on:

Which chip you are using ?
Which protocol you are using ? ESB or use the radio directly ?
You are talking about PTX or PRX ?
"So I want to know when can change to RX mode while a packet sent out?" You mean you want to switch to RX even before TX finish ?

In this figure, what exactly you want to change ?