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pins: Document support for '~' to enable pull-down resistors 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-03-17 21:07:31 -04:00
parent 4a35f927fc
commit 53290664ee
2 changed files with 8 additions and 6 deletions
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12
config/example.cfg
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@ -11,11 +11,13 @@
# A note on pin names: pins may be configured with a hardware name # A note on pin names: pins may be configured with a hardware name
# (such as "PA4") or with an Arduino alias name (such as "ar29" or # (such as "PA4") or with an Arduino alias name (such as "ar29" or
# "analog3"). In order to use Arduino names, the pin_map variable in # "analog3"). In order to use Arduino names, the pin_map variable in
# the mcu section must be present and have a value of "arduino". # the mcu section must be present and have a value of "arduino". Pin
# Pin names may be preceded by an '!' to indicate that a reverse # names may be preceded by an '!' to indicate that a reverse polarity
# polarity should be used (eg, trigger on low instead of high). Input # should be used (eg, trigger on low instead of high). Input pins may
# pins may be preceded by a '^' to indicate that a hardware pull-up # be preceded by a '^' to indicate that a hardware pull-up resistor
# resistor should be enabled for the pin. # should be enabled for the pin. If the micro-controller supports
# pull-down resistors then an input pin may alternatively be preceded
# by a '~'.
# The stepper_x section is used to describe the stepper controlling # The stepper_x section is used to describe the stepper controlling

2
klippy/pins.py
View File

@ -183,7 +183,7 @@ class PrinterPins:
if [c for c in '^~!: ' if c in pin]: if [c for c in '^~!: ' if c in pin]:
format = "" format = ""
if can_pullup: if can_pullup:
format += "[^] " format += "[^~] "
if can_invert: if can_invert:
format += "[!] " format += "[!] "
raise error("Invalid pin description '%s'\n" raise error("Invalid pin description '%s'\n"