The target here is to update the screens of graphical and char base
displays as fast as possible, without draining the planner buffer too much.
For that measure the time it takes to draw and transfer one
(partial) screen to the display. Build a max. value from that.
Because ther can be large differences, depending on how much the display
updates are interrupted, the max value is decreased by one ms/s. This way
it can shrink again.
On the other side we keep track on how much time it takes to empty the
planner buffer.
Now we draw the next (partial) display update only then, when we do not
drain the planner buffer to much. We draw only when the time in the
buffer is two times larger than a update takes, or the buffer is empty anyway.
When we have begun to draw a screen we do not wait until the next 100ms
time slot comes. We draw the next partial screen as fast as possible, but
give the system a chance to refill the buffers a bit.
When we see, during drawing a screen, the screen contend has changed,
we stop the current draw and begin to draw the new content from the top.
This configuration file is based on the original configuration file shipped with the heavily modified Marlin fork by BQ. The original firmware and configuration file can be found at BQ Github repository.
NOTE: The look and feel of the Hephestos 2 while navigating the LCD menu will change by using the original Marlin firmware.
Changelog
2016/03/01 - Initial release
2016/03/21 - Activated 4-point auto leveling by default
Updated miscellaneous z-probe values
2016/06/21 - Disabled hot bed related options
Activated software endstops
SD printing now disables the heater when finished
2016/07/13 - Update the DEFAULT_AXIS_STEPS_PER_UNIT for the Z axis
Increased the DEFAULT_XYJERK