nrf24L01+ radio pipe address

RE: nrf24L01+ radio pipe address

jing — Thu, 11 Jun 2015 15:51:04 GMT

you are right. how could I missed this!

thank you

RE: nrf24L01+ radio pipe address

Hung Bui — Thu, 11 Jun 2015 15:42:10 GMT

@Jing: thanks for the link. Sorry we have so many product that I couldn't remember the abbreviation.

Actually, you were correct in the observation that LSB of Pipe 0 should not equal to LSB of Pipe 1 or other pipe. If you have a look at page 44 in the nRF24LU1+ Product Specification you can find this:

The LSByte must be unique for all six pipes

Same can be found in the nRF24L01+ and nRF24LE1 documentation.

So, even for pipe 0 where it has its own base address, the LSB must be Unique.

I couldn't find that in the nRF51 documentation but I suspect that the same applied. I will check this with the developer.

Sorry that I didn't catch this at the first place.

RE: nrf24L01+ radio pipe address

jing — Thu, 11 Jun 2015 14:45:42 GMT

nrfready desktop 2 --> www.nordicsemi.com/.../nRFready-Desktop-2-Reference-Design

RE: nrf24L01+ radio pipe address

Hung Bui — Thu, 11 Jun 2015 14:36:15 GMT

@jing:Sorry that I might not very familiar with legacy product, but what is dt2 v2.2.0 ? Could you give me a link ?

RE: nrf24L01+ radio pipe address

jing — Thu, 11 Jun 2015 14:20:41 GMT

original dt2 v2.2.0 code works. but as long as there is an opened non-zero pipe with prefix byte similar to pairing pipe (pipe 0) prefix byte, I cannot seem to be able to pair with the dongle

RE: nrf24L01+ radio pipe address

Hung Bui — Thu, 11 Jun 2015 12:46:12 GMT

@Jing: Could you let me know what exactly the Base Address Pipe 0 and Base Address Pipe 1 are and prefix Pipe 0 and Prefix Pipe 1 are ?

Also please let me know what set up worked, what set up doesn't work. If you don't change the prefix byte for pipe 1 to 0 but something else, would it work ?

RE: nrf24L01+ radio pipe address

jing — Thu, 11 Jun 2015 02:51:04 GMT

yes. I am using gazell which is based on ESB. and yes, confirmed

LU1p ChidID is different from the gzp pairing address; therefore base address for pipe 0 and 1 should be different on the dongle side.
initial base address for pipe > 0 is different from gzp pairing address on the device side

Receiver side is using the nrf24lu1p dongle code while Device side is running nrf51822 application using the gzll_arm.lib provided with the DT2.

For this experiment, i just changed the gzp_update_radio_params() on both dongle and device code to set the prefix byte for pipes 1 onward to start from 0 and then i could not pair.

jing

RE: nrf24L01+ radio pipe address

Hung Bui — Wed, 10 Jun 2015 10:39:57 GMT

@Jing: I am assuming you were talking about Enhanced Shockburst protocol. On Pipe 0 and Pipe 1 you should have no problem having them with same LSByte.

The restriction is applied only for Pipe 1 to pipe 5 where they share the same 4 MSBytes.

Have you made sure the MSB first 4 bytes on pipe 0 and pipe 1 are different ?