[riot-notifications] [RIOT-OS/RIOT] drivers: add kw41zrf (#12277)

Thomas Stilwell notifications at github.com
Thu Sep 26 00:50:54 CEST 2019

> _Originally posted by @benemorius in #10364_
> > By the way there's a bug in the #7107 CSMA implementation that prevents any retransmissions from actually happening if the initial CCA fails.
> > After _isr_event_seq_t_ccairq() calls kw41zrf_tx_exec() to retransmit the last frame, _isr_event_seq_tr() cancels the transmission by calling kw41zrf_abort_sequence() while handling ZLL_IRQSTS_SEQIRQ_MASK.
> > But with that fixed I think it works as intended.
> Isn't this still the case?

No I resolved that by having `_isr_event_seq_t_ccairq()` handle the `SEQIRQ` and then masking the already-handled IRQs when calling `_isr_event_seq_tr()`.

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