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add warnings to keypad and rp2pio as well

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This commit is contained in:
Dan Halbert 2024-09-16 15:07:37 -04:00
parent 2a690754e5
commit 8b740373ed
2 changed files with 11 additions and 0 deletions
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5
ports/raspberrypi/bindings/rp2pio/__init__.c
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@ -17,6 +17,11 @@
//| introduction and guide to working with PIO in CircuitPython, see `this
//| Learn guide <https://learn.adafruit.com/intro-to-rp2040-pio-with-circuitpython>`_.
//|
//| .. warning:: Using PIO inputs on Raspberry Pi RP2350 A2 stepping has some limitations
//| due to a GPIO hardware issue that causes excessive leakage current (~120uA).
//| A pin can read as high even when driven or pulled low, if the input signal is high
//| impedance or if an attached pull-down resistor is too weak (has too high a value).
//| See the warning in `digitalio` for more information.
//| """
//|

6
shared-bindings/keypad/__init__.c
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@ -70,6 +70,12 @@ const mp_obj_property_t keypad_generic_events_obj = {
//| For more information about working with the `keypad` module in CircuitPython,
//| see `this Learn guide <https://learn.adafruit.com/key-pad-matrix-scanning-in-circuitpython>`_.
//|
//| .. warning:: Using pull-downs with `keypad` on Raspberry Pi RP2350 A2 stepping has some limitations
//| due to a GPIO hardware issue that causes excessive leakage current (~120uA).
//| A pin can read as high even when driven or pulled low, if the input signal is high
//| impedance or if an attached pull-down resistor is too weak (has too high a value).
//| See the warning in `digitalio` for more information.
//|
//| .. jinja
//| """