With a baudrate of 1000000, when i transmit 2 subsequent packets (with ACK), i have to put a delay of 0.2 msec or more. Otherwise the second packet will get ACQ packet acknowledge from PRX, with a delay. The first transmission last 0.66msec, the second 1.6msec. I write command W_TX_PAYLOAD each time, and 32 bytes of data; then CE transitions from to low to high each time.
With baudrate 250000, transmission last about 1.8msec. I measure transmission time from CE low->high to ACK interrupt.
