-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathjm_eztimer.spin
125 lines (77 loc) · 4.17 KB
/
jm_eztimer.spin
1
'' ================================================================================================='''' File....... jm_eztimer.spin'' Purpose.... Asyncrhonous (accumulator) timer'' -- methods must be called every ~53.687s (80MHz) or sooner to prevent rollover'' Author..... Jon "JonnyMac" McPhalen'' Copyright (c) 2014 Jon McPhalen'' -- see below for terms of use'' E-mail..... [email protected]'' Started.... '' Updated.... 23 MAY 2014'''' =================================================================================================convar long sync ' sync point (snapshot of cnt) long tix ' ticks accumulator long tms ' ticks per millisecond long ms ' milliseconds accumulator pub start '' Start or restart the timer object startx(cnt) ' start now pub startx(spoint)'' Start the timer object with specific sync point'' -- for synchronizing with another timer sync := spoint ' set sync point tms := clkfreq / 1_000 ' set ticks/millisecond tix := 0 ' reset ticks accumulator ms := 0 ' reset milliseconds accumulator pub millis'' Returns milliseconds accumulator mark ' update timer return ms ' return millisecondspub seconds'' Returns seconds (from ms accumulator) mark ' update timer return ms / 1000 ' return secondspub adjust(msoffset)'' Adjust milliseconds register mark ms += msoffsetpub mark | now, delta'' Marks the current point'' -- updates ticks and ms accumulators'' -- returns current milliseconds now := cnt ' capture cnt delta := now - sync ' delta since last capture if (delta < 0) ' rollover past posx? ms += posx / tms ' add posx millis delta += posx + (posx // tms) + 2 ' correct delta tix += delta ' increment ticks ms += tix / tms ' update millis tix //= tms ' udpate ticks sync := now ' reset sync point return ms ' return millispub get_sync'' Returns sync point'' -- used to syncronize multiple timers return sync dat { license }{{ Terms of Use: MIT License Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.}}