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tmc: Do not override tcoolthrs if it is configured 

If tcoolthrs is configured (not the default 0), then do not force
the value of tcoolthrs=0xfffff during homing. This way, tcoolthrs
can be set to a custom value during homing.

`tpwmthrs` and `en_pwm_mode`/`en_spreadcycle` are now also
correctly restored if they were changed after startup.

Signed-off-by: Alex Voinea <voinea.dragos.alexandru@gmail.com>
This commit is contained in:
Alex Voinea 2023-03-11 18:20:32 +01:00 committed by KevinOConnor
parent fd167894a0
commit a9feeaa9eb
1 changed files with 8 additions and 10 deletions
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14
klippy/extras/tmc.py
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@ -452,13 +452,6 @@ class TMCVirtualPinHelper:
if self.diag_pin is None:
raise ppins.error("tmc virtual endstop requires diag pin config")
# Setup for sensorless homing
reg = self.fields.lookup_register("en_pwm_mode", None)
if reg is None:
self.en_pwm = not self.fields.get_field("en_spreadcycle")
self.pwmthrs = self.fields.get_field("tpwmthrs")
else:
self.en_pwm = self.fields.get_field("en_pwm_mode")
self.pwmthrs = 0
self.printer.register_event_handler("homing:homing_move_begin",
self.handle_homing_move_begin)
self.printer.register_event_handler("homing:homing_move_end",
@ -468,17 +461,22 @@ class TMCVirtualPinHelper:
def handle_homing_move_begin(self, hmove):
if self.mcu_endstop not in hmove.get_mcu_endstops():
return
self.pwmthrs = self.fields.get_field("tpwmthrs")
self.coolthrs = self.fields.get_field("tcoolthrs")
reg = self.fields.lookup_register("en_pwm_mode", None)
if reg is None:
# On "stallguard4" drivers, "stealthchop" must be enabled
self.en_pwm = not self.fields.get_field("en_spreadcycle")
tp_val = self.fields.set_field("tpwmthrs", 0)
self.mcu_tmc.set_register("TPWMTHRS", tp_val)
val = self.fields.set_field("en_spreadcycle", 0)
else:
# On earlier drivers, "stealthchop" must be disabled
self.en_pwm = self.fields.get_field("en_pwm_mode")
self.fields.set_field("en_pwm_mode", 0)
val = self.fields.set_field(self.diag_pin_field, 1)
self.mcu_tmc.set_register("GCONF", val)
if self.coolthrs == 0:
tc_val = self.fields.set_field("tcoolthrs", 0xfffff)
self.mcu_tmc.set_register("TCOOLTHRS", tc_val)
def handle_homing_move_end(self, hmove):
@ -493,7 +491,7 @@ class TMCVirtualPinHelper:
self.fields.set_field("en_pwm_mode", self.en_pwm)
val = self.fields.set_field(self.diag_pin_field, 0)
self.mcu_tmc.set_register("GCONF", val)
tc_val = self.fields.set_field("tcoolthrs", 0)
tc_val = self.fields.set_field("tcoolthrs", self.coolthrs)
self.mcu_tmc.set_register("TCOOLTHRS", tc_val)