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10 commits

Author SHA1 Message Date
Bob-the-Kuhn 0369f97ec1 guaranteed BLTouch detection
To guarantee that the 5mS pulse from a BLTouch is recognized you need to
have the endstops.update() routine run twice in that 5mS period.

At 200 steps per mm, my system has problems  below a feedrate of 120 mm
per minute.

Two things were done to guarantee the two updates within 5mS:
1) In interrupt mode, a check was added to the temperature ISR.  If the
endstop interrupt flag/counter is active then it'll kick off the endstop
update routine every 1mS until the flag/counter is zero.  This
flag/counter is decremented by the temperature ISR AND by the stepper
ISR.

2) In poling mode, code was added to the stepper ISR that will make sure
the ISR runs about every 1.5mS.  The "extra" ISR runs only check the
endstops.  This was done by grabbing the intended ISR delay and, if it's
over 2.0mS, splitting the intended delay into multiple smaller delays.
The first delay can be up to 2.0mS, the next ones 1.5mS (as needed) and
the last no less than 0.5mS.

=========================================

BLTouch error state recovery

If BLTouch already active when deploying the probe then try to reset it
& clear the probe.

If that doesn't fix it then declare an error.

Also added BLTouch init routine to startup section
2017-02-11 12:01:34 -06:00
Scott Lahteine f3720f4e81 const arguments to test_dual_z_endstops 2016-10-29 16:01:27 -05:00
João Brázio 3ebad4e020 Moves all global enums to a central file 2016-07-19 14:31:09 +01:00
Scott Lahteine 7242d44810 Endstops vars already initialized 2016-07-17 13:38:48 -07:00
Scott Lahteine e60224a943 Drop FORCE_INLINE from endstops.h
`FORCE_INLINE` seems to have no effect with standard optimization.
2016-05-30 17:08:56 -07:00
Scott Lahteine 26f866b908 Apply static to Endstops class 2016-05-30 16:23:43 -07:00
Scott Lahteine 15fc93d742 Cleanup and consolidate probe conditionals for clarity 2016-05-08 12:59:43 -07:00
Scott Lahteine 24a15332b3 Encapsulate dual Z endstop handling 2016-04-30 17:26:50 -07:00
Scott Lahteine 5076d12344 Localize M119 in Endstops class 2016-04-30 17:26:50 -07:00
Scott Lahteine 5e4e535ce8 Stepper and Endstops as singleton objects 2016-04-30 17:26:50 -07:00