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mcu: Remove python checks for stepcompress integer overflow 

Now that the C code checks for overflow, it is no longer necessary for
the python code to check.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2016-11-02 10:37:31 -04:00
parent 508a934d62
commit 2b7ab290b8
2 changed files with 4 additions and 9 deletions
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4
docs/Firmware_Commands.md
View File

@ -249,9 +249,7 @@ Stepper commands
* reset_step_clock oid=%c clock=%u : Normally, step timing is relative
to the last step for a given stepper. This command resets the clock
so that the next step is relative to the supplied 'clock' time. The
host usually only sends this command at the start of a print or
after a long idle period for the stepper (for example a Z stepper
move after printing an extensive layer).
host usually only sends this command at the start of a print.
* end_stop_home oid=%c clock=%u rest_ticks=%u pin_value=%c : This
command is used during stepper "homing" operations. To use this

9
klippy/mcu.py
View File

@ -23,7 +23,6 @@ class MCU_stepper:
step_pin, pullup, invert_step = parse_pin_extras(step_pin)
dir_pin, pullup, self._invert_dir = parse_pin_extras(dir_pin)
self._sdir = -1
self._last_move_clock = -2**29
self._mcu_freq = mcu.get_mcu_freq()
min_stop_interval = int(min_stop_interval * self._mcu_freq)
max_error = int(max_error * self._mcu_freq)
@ -48,18 +47,16 @@ class MCU_stepper:
return self._invert_dir
def note_stepper_stop(self):
self._sdir = -1
self._last_move_clock = -2**29
def _reset_step_clock(self, clock):
self.ffi_lib.stepcompress_reset(self._stepqueue, clock)
data = (self._reset_cmd.msgid, self._oid, clock & 0xffffffff)
self.ffi_lib.stepcompress_queue_msg(self._stepqueue, data, len(data))
def set_next_step_dir(self, mcu_time, sdir):
clock = int(mcu_time * self._mcu_freq)
if clock - self._last_move_clock >= 2**29:
self._reset_step_clock(clock)
self._last_move_clock = clock
if self._sdir == sdir:
return
if self._sdir == -1:
clock = int(mcu_time * self._mcu_freq)
self._reset_step_clock(clock)
self._sdir = sdir
data = (self._dir_cmd.msgid, self._oid, sdir ^ self._invert_dir)
self.ffi_lib.stepcompress_queue_msg(self._stepqueue, data, len(data))