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Diffstat (limited to 'docs/esp32')
| -rw-r--r-- | docs/esp32/quickref.rst | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/docs/esp32/quickref.rst b/docs/esp32/quickref.rst index dd7e515f1b..894508f4c2 100644 --- a/docs/esp32/quickref.rst +++ b/docs/esp32/quickref.rst @@ -562,6 +562,23 @@ deep-sleep if pad hold is enabled with the ``hold=True`` argument to ``Pin.init()``. Non-RTC GPIO pins will be disconnected by default on entering deep-sleep. +Configuration of non-RTC pins - including output level - can be retained by +enabling pad hold on the pin and enabling GPIO pad hold during deep-sleep:: + + from machine import Pin, deepsleep + import esp32 + + opin = Pin(19, Pin.OUT, value=1, hold=True) # hold output level + ipin = Pin(21, Pin.IN, Pin.PULL_UP, hold=True) # hold pull-up + + # enable pad hold in deep-sleep for non-RTC GPIO + esp32.gpio_deep_sleep_hold(True) + + # put the device to sleep for 10 seconds + deepsleep(10000) + +The pin configuration - including the pad hold - will be retained on wake from +sleep. See :ref:`Pins_and_GPIO` above for a further discussion of pad holding. SD card ------- |