diff options
| -rw-r--r-- | docs/library/machine.Pin.rst | 52 | ||||
| -rw-r--r-- | docs/wipy/general.rst | 53 |
2 files changed, 53 insertions, 52 deletions
diff --git a/docs/library/machine.Pin.rst b/docs/library/machine.Pin.rst index 952131f099..d3aa37b45d 100644 --- a/docs/library/machine.Pin.rst +++ b/docs/library/machine.Pin.rst @@ -38,58 +38,6 @@ Usage Model:: # configure an irq callback p0.irq(lambda p:print(p)) -.. only:: port_wipy - - On the WiPy board the pins are identified by their string id:: - - from machine import Pin - g = machine.Pin('GP9', mode=Pin.OUT, pull=None, drive=Pin.MED_POWER, alt=-1) - - You can also configure the Pin to generate interrupts. For instance:: - - from machine import Pin - - def pincb(pin): - print(pin.id()) - - pin_int = Pin('GP10', mode=Pin.IN, pull=Pin.PULL_DOWN) - pin_int.irq(trigger=Pin.IRQ_RISING, handler=pincb) - # the callback can be triggered manually - pin_int.irq()() - # to disable the callback - pin_int.irq().disable() - - 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. - - For the ``drive`` parameter the strengths are: - - - ``Pin.LOW_POWER`` - 2mA drive capability. - - ``Pin.MED_POWER`` - 4mA drive capability. - - ``Pin.HIGH_POWER`` - 6mA drive capability. - - For the ``alt`` parameter please refer to the pinout and alternate functions - table at <https://raw.githubusercontent.com/wipy/wipy/master/docs/PinOUT.png>`_ - for the specific alternate functions that each pin supports. - - For interrupts, the ``priority`` can take values in the range 1-7. And the - ``wake`` parameter has the following properties: - - - If ``wake_from=machine.Sleep.ACTIVE`` any pin can wake the board. - - If ``wake_from=machine.Sleep.SUSPENDED`` pins ``GP2``, ``GP4``, ``GP10``, - ``GP11``, GP17`` or ``GP24`` can wake the board. Note that only 1 - of this pins can be enabled as a wake source at the same time, so, only - the last enabled pin as a ``machine.Sleep.SUSPENDED`` wake source will have effect. - - If ``wake_from=machine.Sleep.SUSPENDED`` pins ``GP2``, ``GP4``, ``GP10``, - ``GP11``, ``GP17`` and ``GP24`` can wake the board. In this case all of the - 6 pins can be enabled as a ``machine.Sleep.HIBERNATE`` wake source at the same time. - Constructors ------------ diff --git a/docs/wipy/general.rst b/docs/wipy/general.rst index 0991dbaeaf..0d0327f4b3 100644 --- a/docs/wipy/general.rst +++ b/docs/wipy/general.rst @@ -179,3 +179,56 @@ Details on sleep modes * ``machine.sleep()``: 950uA (in WLAN STA mode). Wake sources are ``Pin``, ``RTC`` and ``WLAN`` * ``machine.deepsleep()``: ~350uA. Wake sources are ``Pin`` and ``RTC``. + +Additional details for machine.Pin +---------------------------------- + +On the WiPy board the pins are identified by their string id:: + + from machine import Pin + g = machine.Pin('GP9', mode=Pin.OUT, pull=None, drive=Pin.MED_POWER, alt=-1) + +You can also configure the Pin to generate interrupts. For instance:: + + from machine import Pin + + def pincb(pin): + print(pin.id()) + + pin_int = Pin('GP10', mode=Pin.IN, pull=Pin.PULL_DOWN) + pin_int.irq(trigger=Pin.IRQ_RISING, handler=pincb) + # the callback can be triggered manually + pin_int.irq()() + # to disable the callback + pin_int.irq().disable() + +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. + +For the ``drive`` parameter the strengths are: + + - ``Pin.LOW_POWER`` - 2mA drive capability. + - ``Pin.MED_POWER`` - 4mA drive capability. + - ``Pin.HIGH_POWER`` - 6mA drive capability. + +For the ``alt`` parameter please refer to the pinout and alternate functions +table at <https://raw.githubusercontent.com/wipy/wipy/master/docs/PinOUT.png>`_ +for the specific alternate functions that each pin supports. + +For interrupts, the ``priority`` can take values in the range 1-7. And the +``wake`` parameter has the following properties: + + - If ``wake_from=machine.Sleep.ACTIVE`` any pin can wake the board. + - If ``wake_from=machine.Sleep.SUSPENDED`` pins ``GP2``, ``GP4``, ``GP10``, + ``GP11``, GP17`` or ``GP24`` can wake the board. Note that only 1 + of this pins can be enabled as a wake source at the same time, so, only + the last enabled pin as a ``machine.Sleep.SUSPENDED`` wake source will have effect. + - If ``wake_from=machine.Sleep.SUSPENDED`` pins ``GP2``, ``GP4``, ``GP10``, + ``GP11``, ``GP17`` and ``GP24`` can wake the board. In this case all of the + 6 pins can be enabled as a ``machine.Sleep.HIBERNATE`` wake source at the same time. |