[riot-notifications] [RIOT-OS/RIOT] TI CC3200 SimpleLink RIOT support (#11866)
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Sun Sep 15 22:48:19 CEST 2019
benpicco commented on this pull request.
> @@ -0,0 +1,8 @@
+# Additional MCU features
+FEATURES_PROVIDED += periph_cpuid
+FEATURES_PROVIDED += periph_hwrng
+FEATURES_PROVIDED += puf_sram
Oh yea the sram puf really just reads uninitialized SRAM - I thought it was a more elaborate *physical unclonable function* that some chips might provide - but this basically just say 'the ram on this platform is pretty much random at startup, so it can be used as a random seed'.
I would have expected this to be mostly 0, but apparently [it's a think](https://en.wikipedia.org/wiki/Types_of_physical_unclonable_function#SRAM_PUF) - so keep it.
If it's really just that it might be moved to `cortexm_common/` at some point.
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