WRITE/READ COMMAND FOR NRF24L01 VIA SPI

RE: WRITE/READ COMMAND FOR NRF24L01 VIA SPI

awneil — Thu, 26 Sep 2019 20:06:48 GMT

Be sure to update your other thread with the solution, and also mark that one as solved:

https://devzone.nordicsemi.com/f/nordic-q-a/52088/write-read-command-for-nrf24l01-via-spi

RE: WRITE/READ COMMAND FOR NRF24L01 VIA SPI

paolo lucantonio — Thu, 26 Sep 2019 20:04:31 GMT

The problem was that the ZYNQ board had as default configuration the deassertion of the CSN between the end of a word and the beginning of the following one so that every byte sent to nrf were considered as a new command for nrf and it sent to the miso signal the status register every time. Luckily this option could be removed and now the csn is kept asserted. (i'm sorry for the double problem now i'll close this one and i'll open a new thread, thank you)

RE: WRITE/READ COMMAND FOR NRF24L01 VIA SPI

awneil — Thu, 26 Sep 2019 20:00:32 GMT

[quote userid="83319" url="~/f/nordic-q-a/52116/write-read-command-for-nrf24l01-via-spi/212136"]i was able to use a logic analyser and solve the problem[/quote]

So, for the benefit of others who may have similar issues, what was the problem?

And how was it solved?

Probably better to put that in the other thread ...

[quote userid="83319" url="~/f/nordic-q-a/52116/write-read-command-for-nrf24l01-via-spi/212136"]now another one appeared[/quote]

Please keep to one problem per thread.

RE: WRITE/READ COMMAND FOR NRF24L01 VIA SPI

paolo lucantonio — Thu, 26 Sep 2019 19:53:21 GMT

hi everyone, i was able to use a logic analyser and solve the problem, but now another one appeared: i'm trying to configure the nrf to rx and according to the state diagram i realized that: as the nrf is supplied and the voltage goes over 1,9V the nrf goes in the power down mode. i should be able to send via spi the command to set the pwr_up bit to 1 to allow the nrf to go the stand_by 1 state and after the 1,5ms needed to the nrf i should set both ce and prim_rx to 1, am i wrong? The main problem is that the nrf is ignoring the writing command; are needed other instrunction? (i also tried to first read the config_Register and then to put it in a bit-a-bit or to my data byte and then sending the resulting byte to nrf but with 0 result. p.s the reading command isn't having any problem )

RE: WRITE/READ COMMAND FOR NRF24L01 VIA SPI

awneil — Wed, 18 Sep 2019 10:59:17 GMT

Probably easier to stick to your other thread:

https://devzone.nordicsemi.com/f/nordic-q-a/52088/write-read-command-for-nrf24l01-via-spi

As Kenneth said there, you need a logic analyser to see what's happening...

RE: WRITE/READ COMMAND FOR NRF24L01 VIA SPI

paolo lucantonio — Wed, 18 Sep 2019 10:55:19 GMT

i checked many codes, i also studied all the arduino library for NRF and for what i understood the functions for writing and reading register on NRF should be correct but they don't work so it seems i'm missing something that i can't get