Using startTransmit while a packet is being received

[RobertDeHate]

I am unclear how the library works in this case on a LR1121 radio.
I want to issue the command startTransmit but what if the radio is in the middle of receiving a packet?
Is their a test I should make before issuing the transmit command to verify the radio is idle?
Looking at the SX1262 data sheet I see there is an irq for preamble detect but don't know if it's used for anything.
So if it's in the middle of receiving when I issue the Tx command will it wait for Rx to complete then transmit when the Rx finishes?
I see the Tx and Rx buffer default to share the same start or can have different start positions in the 256byte buffer so they don't overwrite each other.
Thanks,
Robert

[jgromes]

This case is not handled by the lbirary - if you command the radio to transmit while a packet reception is ongoing, it will stop the ongoing reception, dropping the packet. The chance for this situation ocurring depends on your duty cycle. In terms of the buffer, I'm not 100% sure when exactly is the received packet written into the Rx FIFO, but I think it is written only at the end of reception.

If you really need to make sure this collision never happens, you can call getIrqFlags() before starting transmitting a packet and checking whether the RADIOLIB_LR11X0_IRQ_PREAMBLE_DETECTED is set.