nRF24LO1+ Auto-Reply FIFO Operation

Projects Programming
1

So, the auto-reply FIFO in the nRF24LO1+ can hold up to 3 packets. Let's call them 0, 1, and 2 with #2 being the packet that will be sent the next time a packet is received and auto-reply required.

I'm curious what happens if you attempt to 'writeAckPayload()' another packet into the FIFO while it's full. I can think of two reasonable results:

  1. The new packet is simply discarded.

  2. The new packet is written into FIFO position 0, the packet previously in position 0 is promoted to position 1, the packet previously in position 1 is promoted to position 2, and the packet previously in position 2 is discarded.

Anyone know what really happens?

Thanks.

PS - Please excuse if you see this same topic posted twice. The Forum software seems to have eaten my first posting so I'm sending it again.

2

The new packet pushes the first packet (oldest packet) out of the fifo IIRC.

3

Thank you.

4

gfvalvo:
PS - Please excuse if you see this same topic posted twice. The Forum software seems to have eaten my first posting so I'm sending it again.

In a different section? No. That is not what happened. Please stop cross-posting.

5

[quote author=Coding Badly date=1540167444 link=msg=3914872]
Please stop cross-posting.[/quote]
Sorry, if I did it wasn't intentional. That should be obvious. I have over 2000 post and you will not be able to find a single cross-post. In other words, relax.