CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=5.0.0-beta.3 2020-01-04T17:32:49+00:00 2020-01-04T17:32:49+00:00 Marius-450 marius_450@protonmail.com 2020-01-04T17:32:49+00:00 urn:sha1:3ad3d49959271b4b33950d9d68daf1b9a722c95f 2020-01-04T17:20:32+00:00 Marius-450 marius_450@protonmail.com 2020-01-04T17:20:32+00:00 urn:sha1:d2b2cf0addd3476256d34cde4df2f53f6a2868a9 2019-12-20T19:43:56+00:00 Scott Shawcroft scott@tannewt.org 2019-12-20T19:42:32+00:00 urn:sha1:b859e2b71013f603bb91539a62ada4e0eee15d48 2019-12-11T02:04:46+00:00 Dan Halbert halbert@halwitz.org 2019-12-11T02:04:46+00:00 urn:sha1:68ae47907c076a966a533d90371acf65ae9875c8 2019-12-10T20:03:06+00:00 Jeff Epler jepler@gmail.com 2019-11-26T15:29:55+00:00 urn:sha1:a08d9e6d8e0059c8aa59feadd7b94d95d691e273 2019-12-06T20:18:20+00:00 Dan Halbert halbert@halwitz.org 2019-12-06T20:18:20+00:00 urn:sha1:d628d2a261bb28b84c6b257a990bd9a30cbe369c 2019-12-06T03:45:53+00:00 Dan Halbert halbert@halwitz.org 2019-12-06T03:45:53+00:00 urn:sha1:40434d691934cf7f5792f91ce0288beb568bab85 2019-12-04T22:39:02+00:00 Scott Shawcroft scott@tannewt.org 2019-11-23T00:33:48+00:00 urn:sha1:17c8356b8c06ac160bf9fad6b6b4b8b1095d8dcd This also sets TinyUSB to master and to not include its submodules. It also fixes an old displayio example comment and retries gattc reads. 2019-11-18T17:26:48+00:00 Jeff Epler jepler@gmail.com 2019-11-18T15:53:12+00:00 urn:sha1:568636d562b4c64d0095ff2ac921b79eb69e520d This improves performance of running python code by 34%, based on the "pystone" benchmark on metro m4 express at 5000 passes (1127.65 -> 1521.6 passes/second). In addition, by instrumenting the tick function and monitoring on an oscilloscope, the time actually spent in run_background_tasks() on the metro m4 decreases from average 43% to 0.5%. (however, there's some additional overhead that is moved around and not accounted for in that "0.5%" figure, each time supervisor_run_background_tasks_if_tick is called but no tick has occurred) On the CPB, it increases pystone from 633 to 769, a smaller percentage increase of 21%. I did not measure the time actually spent in run_background_tasks() on CPB. Testing performed: on metro m4 and cpb, run pystone adapted from python3.4 (change time.time to time.monotonic for sub-second resolution) Besides running a 5000 pass test, I also ran a 50-pass test while scoping how long an output pin was set. Average: 34.59ms or 1445/s on m4, 67.61ms or 739/s on cbp, both matching the other pystone result reasonably well. import pystone import board import digitalio import time d = digitalio.DigitalInOut(board.D13) d.direction = digitalio.Direction.OUTPUT while True: d.value = 0 time.sleep(.01) d.value = 1 pystone.main(50) 2019-11-18T17:01:23+00:00 Jeff Epler jepler@gmail.com 2019-11-18T14:22:41+00:00 urn:sha1:7f744a2369a5036cadfa05575da1704f709c98bb This code is shared by most parts, except where not all the #ifdefs inside the tick function were present in all ports. This mostly would have broken gamepad tick support on non-samd ports. The "ms32" and "ms64" variants of the tick functions are introduced because there is no 64-bit atomic read. Disabling interrupts avoids a low probability bug where milliseconds could be off by ~49.5 days once every ~49.5 days (2^32 ms). Avoiding disabling interrupts when only the low 32 bits are needed is a minor optimization. Testing performed: on metro m4 express, USB still works and time.monotonic_ns() still counts up