CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=6.2.0-beta.3 2021-02-20T16:05:39+00:00 2021-02-20T16:05:39+00:00 Jeff Epler jepler@gmail.com 2021-02-20T16:05:39+00:00 urn:sha1:dde2b8dfb322a9994dcdb137668f567de8d9b84e 2021-02-17T23:49:25+00:00 Jeff Epler jepler@gmail.com 2021-02-17T22:50:49+00:00 urn:sha1:ab5eb86118f5b446d9cb1996b07cae56e3f45643 Since the datasheet cast some doubt on the strength of the "rosc_hw->randombit", I use the SHA256 hash function to create a high quality random seed from random values of uncertain entropy, as well as to generate a sequence of random values from that seed using SHA256 as a cryptographically-secure random number generator. In practice, it produces over 100kB/s of random data which does not have any gross problems according to _PractRand_. 2021-01-29T15:45:00+00:00 Jeff Epler jepler@gmail.com 2021-01-29T15:45:00+00:00 urn:sha1:689fba764a364a9284e80b59aa4b5dcc9e23c38c Closes #4086 2021-01-21T03:16:56+00:00 Scott Shawcroft scott@tannewt.org 2021-01-21T01:10:28+00:00 urn:sha1:2b4ad1ed0399dc77632bf7dca61b269517320ad9 2021-01-15T18:00:29+00:00 Jeff Epler jepler@unpythonic.net 2021-01-15T18:00:29+00:00 urn:sha1:c843122d3dbc34212c64da40baddf1a7b59ac1e1 2021-01-15T15:50:58+00:00 Jeff Epler jepler@unpythonic.net 2021-01-15T15:50:58+00:00 urn:sha1:a98df7209d5e0bd73353f435fb9c206f13da36ca 2021-01-14T20:16:11+00:00 Jeff Epler jepler@unpythonic.net 2021-01-14T20:16:11+00:00 urn:sha1:ad87f3768997d54ea5f98bc9a4668c17b4b3e1f9 2021-01-11T19:52:46+00:00 Jeff Epler jepler@gmail.com 2021-01-11T19:52:46+00:00 urn:sha1:0593e464bfa52eda31ff53772f6e7f8150f6b01c 2021-01-04T18:50:08+00:00 Jeff Epler jepler@gmail.com 2021-01-04T18:50:08+00:00 urn:sha1:09bf58407fc09a308154105636694b65b51cb760 This fixes several problems I encountered. 2020-11-24T15:42:18+00:00 Jeff Epler jeff@adafruit.com 2020-11-24T15:42:18+00:00 urn:sha1:22af5a1fe9ca92f5060d7d9414454801c68d47df Speed up JSON parsing with readinto