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tmc2208: Add support for using an analog mux to access TMC uarts

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-06-10 19:51:43 -04:00
parent 88fe2787a9
commit f6864da58b
2 changed files with 109 additions and 30 deletions
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29
klippy/pins.py
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@ -167,8 +167,7 @@ class PrinterPins:
self.chips = {}
self.active_pins = {}
self.reserved_pins = {}
def lookup_pin(self, pin_desc, can_invert=False, can_pullup=False,
share_type=None):
def parse_pin(self, pin_desc, can_invert=False, can_pullup=False):
desc = pin_desc.strip()
pullup = invert = 0
if can_pullup and (desc.startswith('^') or desc.startswith('~')):
@ -194,17 +193,23 @@ class PrinterPins:
raise error("Invalid pin description '%s'\n"
"Format is: %s[chip_name:] pin_name" % (
pin_desc, format))
share_name = "%s:%s" % (chip_name, pin)
if share_name in self.active_pins:
pin_params = self.active_pins[share_name]
if share_type is None or share_type != pin_params['share_type']:
raise error("pin %s used multiple times in config" % (pin,))
if invert != pin_params['invert'] or pullup != pin_params['pullup']:
raise error("Shared pin %s must have same polarity" % (pin,))
return pin_params
pin_params = {'chip': self.chips[chip_name], 'chip_name': chip_name,
'pin': pin, 'share_type': share_type,
'invert': invert, 'pullup': pullup}
'pin': pin, 'invert': invert, 'pullup': pullup}
return pin_params
def lookup_pin(self, pin_desc, can_invert=False, can_pullup=False,
share_type=None):
pin_params = self.parse_pin(pin_desc, can_invert, can_pullup)
pin = pin_params['pin']
share_name = "%s:%s" % (pin_params['chip_name'], pin)
if share_name in self.active_pins:
share_params = self.active_pins[share_name]
if share_type is None or share_type != share_params['share_type']:
raise error("pin %s used multiple times in config" % (pin,))
if (pin_params['invert'] != share_params['invert']
or pin_params['pullup'] != share_params['pullup']):
raise error("Shared pin %s must have same polarity" % (pin,))
return share_params
pin_params['share_type'] = share_type
self.active_pins[share_name] = pin_params
return pin_params
def setup_pin(self, pin_type, pin_desc):