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| -rw-r--r-- | docs/library/pyb.Pin.rst | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/docs/library/pyb.Pin.rst b/docs/library/pyb.Pin.rst index d13cb9741..292758c11 100644 --- a/docs/library/pyb.Pin.rst +++ b/docs/library/pyb.Pin.rst @@ -58,16 +58,6 @@ an ordinal pin number: You can set ``pyb.Pin.debug(True)`` to get some debug information about how a particular object gets mapped to a pin. -When a pin has the ``Pin.PULL_UP`` or ``Pin.PULL_DOWN`` pull-mode enabled, -that pin has an effective 40k Ohm resistor pulling it to 3V3 or GND -respectively (except pin Y5 which has 11k Ohm resistors). - -Now every time a falling edge is seen on the gpio pin, the callback will be -executed. Caution: mechanical push buttons have "bounce" and pushing or -releasing a switch will often generate multiple edges. -See: http://www.eng.utah.edu/~cs5780/debouncing.pdf for a detailed -explanation, along with various techniques for debouncing. - All pin objects go through the pin mapper to come up with one of the gpio pins. @@ -107,7 +97,7 @@ Methods - ``Pin.IN`` - configure the pin for input; - ``Pin.OUT_PP`` - configure the pin for output, with push-pull control; - ``Pin.OUT_OD`` - configure the pin for output, with open-drain control; - - ``Pin.AF_PP`` - configure the pin for alternate function, pull-pull; + - ``Pin.AF_PP`` - configure the pin for alternate function, push-pull; - ``Pin.AF_OD`` - configure the pin for alternate function, open-drain; - ``Pin.ANALOG`` - configure the pin for analog. @@ -117,6 +107,10 @@ Methods - ``Pin.PULL_UP`` - enable the pull-up resistor; - ``Pin.PULL_DOWN`` - enable the pull-down resistor. + When a pin has the ``Pin.PULL_UP`` or ``Pin.PULL_DOWN`` pull-mode enabled, + that pin has an effective 40k Ohm resistor pulling it to 3V3 or GND + respectively (except pin Y5 which has 11k Ohm resistors). + - *value* if not None will set the port output value before enabling the pin. - *alt* can be used when mode is ``Pin.AF_PP`` or ``Pin.AF_OD`` to set the |