diff options
Diffstat (limited to 'klippy/pins.py')
| -rw-r--r-- | klippy/pins.py | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/klippy/pins.py b/klippy/pins.py index e46bc06b..c612432c 100644 --- a/klippy/pins.py +++ b/klippy/pins.py @@ -1,6 +1,6 @@ # Pin name to pin number definitions # -# Copyright (C) 2016,2017 Kevin O'Connor <kevin@koconnor.net> +# Copyright (C) 2016-2018 Kevin O'Connor <kevin@koconnor.net> # # This file may be distributed under the terms of the GNU GPLv3 license. import re @@ -180,7 +180,8 @@ class PrinterPins: error = error def __init__(self): self.chips = {} - def lookup_pin(self, pin_type, pin_desc): + self.active_pins = {} + def lookup_pin(self, pin_type, pin_desc, share_type=None): can_invert = pin_type in ['stepper', 'endstop', 'digital_out', 'pwm'] can_pullup = pin_type == 'endstop' pullup = invert = 0 @@ -196,8 +197,19 @@ class PrinterPins: chip_name, pin = [s.strip() for s in pin_desc.split(':', 1)] if chip_name not in self.chips: raise error("Unknown pin chip name '%s'" % (chip_name,)) - return {'chip': self.chips[chip_name], 'chip_name': chip_name, - 'type': pin_type, 'pin': pin, 'invert': invert, 'pullup': pullup} + 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, + 'type': pin_type, 'share_type': share_type, + 'pin': pin, 'invert': invert, 'pullup': pullup} + self.active_pins[share_name] = pin_params + return pin_params def setup_pin(self, pin_type, pin_desc): pin_params = self.lookup_pin(pin_type, pin_desc) return pin_params['chip'].setup_pin(pin_params) |