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esp32/modesp32: Add new gpio_deep_sleep_hold function. 

Add a new function to control whether held pins will retain their function
through deep-sleep.

Also document this function and explain how to use this in quickref to
retain pin configuration during deep-sleep.
This commit is contained in:
Jonathan Hogg 2022-03-07 09:22:00 +00:00 committed by Damien George
parent 7684c996bc
commit 21d0599bd1
3 changed files with 33 additions and 0 deletions
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17
docs/esp32/quickref.rst
View File

@ -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
-------

5
docs/library/esp32.rst
View File

@ -30,6 +30,11 @@ Functions
or a tuple/list of valid Pin objects. *level* should be ``esp32.WAKEUP_ALL_LOW``
or ``esp32.WAKEUP_ANY_HIGH``.
.. function:: gpio_deep_sleep_hold(enable)
Configure whether non-RTC GPIO pin configuration is retained during
deep-sleep mode for held pads. *enable* should be a boolean value.
.. function:: raw_temperature()
Read the raw value of the internal temperature sensor, returning an integer.

11
ports/esp32/modesp32.c
View File

@ -131,6 +131,16 @@ STATIC mp_obj_t esp32_wake_on_ext1(size_t n_args, const mp_obj_t *pos_args, mp_m
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(esp32_wake_on_ext1_obj, 0, esp32_wake_on_ext1);
STATIC mp_obj_t esp32_gpio_deep_sleep_hold(const mp_obj_t enable) {
if (mp_obj_is_true(enable)) {
gpio_deep_sleep_hold_en();
} else {
gpio_deep_sleep_hold_dis();
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(esp32_gpio_deep_sleep_hold_obj, esp32_gpio_deep_sleep_hold);
#if CONFIG_IDF_TARGET_ESP32
#include "soc/sens_reg.h"
@ -187,6 +197,7 @@ STATIC const mp_rom_map_elem_t esp32_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_wake_on_touch), MP_ROM_PTR(&esp32_wake_on_touch_obj) },
{ MP_ROM_QSTR(MP_QSTR_wake_on_ext0), MP_ROM_PTR(&esp32_wake_on_ext0_obj) },
{ MP_ROM_QSTR(MP_QSTR_wake_on_ext1), MP_ROM_PTR(&esp32_wake_on_ext1_obj) },
{ MP_ROM_QSTR(MP_QSTR_gpio_deep_sleep_hold), MP_ROM_PTR(&esp32_gpio_deep_sleep_hold_obj) },
#if CONFIG_IDF_TARGET_ESP32
{ MP_ROM_QSTR(MP_QSTR_raw_temperature), MP_ROM_PTR(&esp32_raw_temperature_obj) },
{ MP_ROM_QSTR(MP_QSTR_hall_sensor), MP_ROM_PTR(&esp32_hall_sensor_obj) },