[riot-notifications] [RIOT-OS/RIOT] RDM: The 802.15.4 Radio HAL (#13943)

José Alamos notifications at github.com
Mon Aug 9 16:34:12 CEST 2021

Hi again!

After stress testing the SubMAC, I came to 2 conclusions:

1. Flushing the RX Buffer seems to be more appropriate for the `read` function rather than the `set_trx_state`. For the radio is not ilegal to call `set_trx_state(RX_ON)` when the state is already RX_ON. This might happen when there's a race condition between RX_DONE and ACK timeout (ACK frame received slightly after the ACK timeout). 
2. On RX_DONE or CRC_ERROR we tend to call `set_trx_state(RX_ON)` because the resulting state is hardware dependent. We can simply add a "RX_LEAVE" indication that tells the upper layer that the RX_ON state was left. In such case the upper layer has a way to know when to set the RX_ON state again (and we save several no-op calls to `set_trx_on`)


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