duplicate_pin_override: Debugging tool to permit multiple use pins

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 10 insertions, 3 deletions

diff --git a/klippy/pins.py b/klippy/pins.py
index 4f2c1db2..a160c78b 100644
--- a/klippy/pins.py
+++ b/klippy/pins.py
@@ -205,6 +205,7 @@ class PrinterPins:
         self.chips = {}
         self.active_pins = {}
         self.pin_resolvers = {}
+        self.allow_multi_use_pins = {}
     def parse_pin(self, pin_desc, can_invert=False, can_pullup=False):
         desc = pin_desc.strip()
         pullup = invert = 0
@@ -241,10 +242,12 @@ class PrinterPins:
         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']:
+            if share_name in self.allow_multi_use_pins:
+                pass
+            elif 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']):
+            elif (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
@@ -268,6 +271,10 @@ class PrinterPins:
             raise error("Duplicate chip name '%s'" % (chip_name,))
         self.chips[chip_name] = chip
         self.pin_resolvers[chip_name] = PinResolver()
+    def allow_multi_use_pin(self, pin_desc):
+        pin_params = self.parse_pin(pin_desc)
+        share_name = "%s:%s" % (pin_params['chip_name'], pin_params['pin'])
+        self.allow_multi_use_pins[share_name] = True
 
 def add_printer_objects(config):
     config.get_printer().add_object('pins', PrinterPins())