[riot-notifications] [RIOT-OS/RIOT] pkg/openwsn: re-integrate the network stack as a package (#13824)

Francisco notifications at github.com
Tue May 19 11:13:05 CEST 2020

@fjmolinas commented on this pull request.

> + * @file
+ * @brief       RIOT adaption of the "sctimer" bsp module
+ *
+ * The `sctimer` ("single compare timer") in OpenWSN is the lowest timer
+ * abstraction which is used by the higher layer timer module `opentimers`. In
+ * the end t is responsible for scheduling on the MAC layer. To enable low power
+ * energy modes, this timer usually uses the RTC (real time clock) or RTT (real
+ * time timer) module.
+ *
+ * In order to get the most portable code, this implementation uses ztimer and
+ * defines a new `ztimer_clock` (ZTIMER_32768) that operates at 32768Khz to have
+ * a resolution of ~30usec/tick (same as OpenWSN).
+ *
+ * When available ZTIMER_32768 will be built on top of `periph_rtt` to get low
+ * power capabilities. If not it will be built on top of a regular timer. In
+ * either case it will be shifted up if the base frequency y lower than 32768Hz


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