[riot-notifications] [RIOT-OS/RIOT] cpu/nrf5x: enhance external HF clock source handling to allow for substantial energy savings (#15804)

benpicco notifications at github.com
Sun Jan 24 14:47:23 CET 2021


Hm something is off. I'm trying `examples/gnrc_networking` on the `nrf52840dk` (using `nrf802154_radio`) and with this I get

```
2021-01-24 14:46:18,519 #  ping ff02::1
2021-01-24 14:46:21,522 # 
2021-01-24 14:46:21,524 # --- ff02::1 PING statistics ---
2021-01-24 14:46:21,530 # 3 packets transmitted, 0 packets received, 100% packet loss
```

while on `master` (or with `CLOCK_HFXO_ONBOOT` enabled)

```
2021-01-24 14:42:46,291 #  ping ff02::1
2021-01-24 14:42:46,305 # 12 bytes from fe80::fec2:3d00:0:bb1%6: icmp_seq=0 ttl=64 rssi=56 dBm time=6.705 ms
2021-01-24 14:42:47,308 # 12 bytes from fe80::fec2:3d00:0:bb1%6: icmp_seq=1 ttl=64 rssi=40 dBm time=9.932 ms
2021-01-24 14:42:48,307 # 12 bytes from fe80::fec2:3d00:0:bb1%6: icmp_seq=2 ttl=64 rssi=40 dBm time=8.652 ms
2021-01-24 14:42:48,307 # 
2021-01-24 14:42:48,310 # --- ff02::1 PING statistics ---
2021-01-24 14:42:48,315 # 3 packets transmitted, 3 packets received, 0% packet loss
2021-01-24 14:42:48,319 # round-trip min/avg/max = 6.705/8.429/9.932 ms
```

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