looking for basic start up for NRF24L01

[patallen]

Hi, i am looking for basic start up parameters for a 24L01.

I do all my programm in assembler (sorry i am old).

what i aim to do is simple TX-RX, like a small remote with 4 buttons to a simple receiver.

no need to have extensive encryption, rolling codes or channel scans.  i would like to send like 6 bytes, and get them out to my processor, either unfiltered or thru a fifo,...

There is a lot of parameters into this chip and it loses me. I am used to use my own discrete rf hardware in ook (colpits) at 433.92mhz. i need to move to a higher frequency and more payload.

Is there a start up manual, reference or library that can help me.

all i find is threads with users that reports it doesnt work and need tons of tweaks and modifications to "eventualy" work (regardess of the software method irrc)...

thanks for any helps

[patallen]

Hi, i managed to use some source codes and am able to talk to the unit with SPI, it all seems to work right, i get a irq on the receiv side but never get the payload, no matter what method i use, i always get payload 00 00 00 00...but i get the irq when i send the packet so i am close to get it...

any other comments on how to use the FIFO TX/RX would be appreciated.

thanks.

[patallen]

I successfully made it to work ok, i receive now my payload under dynamic payload lenght. now what i would like to know is the amount of bytes received, i check all data pipes and it always return 0 while i really get 5.

any idea ?

[Priyanka]

Hi Patrick,

From the nRF24L01 datasheet, you can see that when DPL (dynamic payload length) is enabled (via FEATURE.EN_DPL), you must also enable DPL per pipe using the DYNPD register. Make sure you have done this.

Also, maybe you could try to flush the RX buffer to recover properly, say, something like:

uint8_t result = read_register(R_RX_PL_WID);

 

    if (result > 32 || !result) {
        flush_rx();
        return 0;
    }
    return result;

-Priyanka

[patallen]

works great, thank you !

[Priyanka]

Happy to help

[patallen]

i have few other concerns.... i am not able to use 250kbps normally. my system works fine at 2 and 1mbps, i can send many random packets and receive all of them perfectly... but only works one time at 250kbps. if i do a power on reset on the receive side, it always works "once". no Imore iRQ once receive once.

so situation is: i send one packet (6 bytes) under dynamic payload. i receive it ok and then it remains mute. no more irq if i send other packets from a sender.  i reset receiver (power off-on) and it will receive it once again. it doesnt behave like that at 1mbps and 2mbps. any idea would help. thanks,