suspect-devices/circuitpython/ports/atmel-samd/tick.c, branch main CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=main 2020-03-13T18:16:41+00:00 Initial work on SAMD 2020-03-13T18:16:41+00:00 Scott Shawcroft scott@tannewt.org 2020-03-13T06:05:12+00:00 urn:sha1:48b5f2a384e7ecc10ee51b453934a009ea9dc48d Supervisor: move most of systick to the supervisor 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 fix atmel-samd filesystem_tick'ing; clear_temp_status() should check for status indicator in use 2019-09-10T03:17:52+00:00 Dan Halbert halbert@halwitz.org 2019-09-10T03:17:52+00:00 urn:sha1:b8200d72950f4d360a29e2f62d49773954942e5f Actually call gamepadshift_tick 2019-04-16T18:15:42+00:00 Scott Shawcroft scott@tannewt.org 2019-04-16T18:15:42+00:00 urn:sha1:55782901d09167e591d45699cd5db48c5619e1e9 Merge 3.0.0 final bugfixes and changes to master 2018-07-16T13:01:46+00:00 Dan Halbert halbert@halwitz.org 2018-07-16T13:01:46+00:00 urn:sha1:a20ab40ed2384e3d0463c67a792040145203e364 Support M4 2018-06-08T19:56:32+00:00 Scott Shawcroft scott.shawcroft@gmail.com 2018-06-05T20:43:55+00:00 urn:sha1:07a8899c726a53011ead19d4e92cd8ccc09c1e03 Prevent freezing USB during high frequency PulseIn. 2018-06-08T19:56:32+00:00 Scott Shawcroft scott.shawcroft@gmail.com 2018-06-05T19:38:31+00:00 urn:sha1:2fbab8067afcb008bc92d9c155dfef360fbc10f9 We now track the last time the background task ran and bail on the PulseIn if it starves the background work. In practice, this happens after the numbers from pulsein are no longer accurate. This also adjusts interrupt priorities so most are the lowest level except for the tick and USB interrupts. Fixes #516 and #876 atmel-samd: Make ticks more atomic. 2018-06-01T22:08:52+00:00 Scott Shawcroft scott.shawcroft@gmail.com 2018-05-31T23:47:18+00:00 urn:sha1:9920f0a5de11b894b6255888475e6272e5e83f94 Always use current_tick when sub millisecond precision is required. Otherwise getting the ms/us to correspond is tricky. cleanup in tick.c 2018-04-20T19:23:03+00:00 Jerry Needell jerryneedell@gmail.com 2018-04-20T19:23:03+00:00 urn:sha1:bef05ffbf183225563d087de8b48e80dbeb7dd17 modify tick.c to simplify - remove interupt disable from common_hal_pulseio_pulsein_resume 2018-04-20T15:59:33+00:00 Jerry Needell jerryneedell@gmail.com 2018-04-20T15:59:33+00:00 urn:sha1:fe738598dacd97149db738216fe4e574b8a926a7