circuitpython/shared-bindings/alarm/__init__.c

//| """Power-saving light and deep sleep. Alarms can be set to wake up from sleep.
//|
//| The `alarm` module provides sleep related functionality. There are two supported levels of
//| sleep, light and deep.
//|
//| Light sleep leaves the CPU and RAM powered so that CircuitPython can resume where it left off
//| after being woken up. CircuitPython automatically goes into a light sleep when `time.sleep()` is
//| called. To light sleep until a non-time alarm use `alarm.sleep_until_alarm()`. Any active
//| peripherals, such as I2C, are left on.
//|
//| Deep sleep shuts down power to nearly all of the chip including the CPU and RAM. This can save
//| a more significant amount of power, but CircuitPython must start ``code.py`` from the beginning when woken
//| up. CircuitPython will enter deep sleep automatically when the current program exits without error
//| or calls `sys.exit(0)`.
//| If an error causes CircuitPython to exit, error LED error flashes will be done periodically.
//| An error includes an uncaught exception, or sys.exit called with a non-zero argumetn.
//| To set alarms for deep sleep use `alarm.reload_on_alarm()` they will apply to next deep sleep only."""
//|

//| wake_alarm: Alarm
//| """The most recent alarm to wake us up from a sleep (light or deep.)"""
//|

//| reset_reason: ResetReason
//| """The reason the chip started up from reset state. This can may be power up or due to an alarm."""
//|

//| def sleep(alarm: Alarm, ...) -> Alarm:
//|     """Performs a light sleep until woken by one of the alarms. The alarm that triggers the wake
//|        is returned, and is also available as `alarm.wake_alarm`
//|     ...
//|

#include "py/obj.h"
#include "py/runtime.h"

STATIC mp_obj_t alarm_sleep_until_alarm(size_t n_args, const mp_obj_t *args) {
    // TODO
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(alarm_sleep_until_alarm_obj, 1, MP_OBJ_FUN_ARGS_MAX, alarm_sleep_until_alarm);

//| def restart_on_alarm(alarm: Alarm, ...) -> None:
//|     """Set one or more alarms to wake up from a deep sleep.
//|     When awakened, ``code.py`` will restart from the beginning.
//|     The last alarm to wake us up is available as `wake_alarm`.
//|     """
//|     ...
//|
STATIC mp_obj_t alarm_restart_on_alarm(size_t n_args, const mp_obj_t *args) {
    // TODO
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(alarm_restart_on_alarm_obj, 1, MP_OBJ_FUN_ARGS_MAX, alarm_restart_on_alarm);

//| """The `alarm.pin` module contains alarm attributes and classes related to pins
//| """
//|
mp_map_elem_t alarm_pin_globals_table[] = {
    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_pin) },

    { MP_ROM_QSTR(MP_QSTR_PinAlarm), MP_ROM_PTR(&alarm_pin_pin_alarm_type) },
};

STATIC MP_DEFINE_CONST_DICT(alarm_pin_globals, alarm_pin_globals_table);

const mp_obj_module_t alarm_pin_module = {
    .base = { &mp_type_module },
    .globals = (mp_obj_dict_t*)&alarm_pinn_globals,
};

//| """The `alarm.time` module contains alarm attributes and classes related to time-keeping.
//| """
//|
mp_map_elem_t alarm_time_globals_table[] = {
    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_time) },

    { MP_ROM_QSTR(MP_QSTR_DurationAlarm), MP_ROM_PTR(&alarm_time_duration_alarm_type) },
};

STATIC MP_DEFINE_CONST_DICT(alarm_time_globals, alarm_time_globals_table);

const mp_obj_module_t alarm_time_module = {
    .base = { &mp_type_module },
    .globals = (mp_obj_dict_t*)&alarm_time_globals,
};

mp_map_elem_t alarm_module_globals_table[] = {
    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_alarm) },

    // wake_alarm and reset_reason are mutable attributes.
    { MP_ROM_QSTR(MP_QSTR_wake_alarm), mp_const_none },
    { MP_ROM_QSTR(MP_QSTR_reset_reason), mp_const_none },

    { MP_ROM_QSTR(MP_QSTR_sleep_until_alarm), MP_ROM_PTR(&alarm_sleep_until_alarm_obj) },
    { MP_ROM_QSTR(MP_QSTR_restart_on_alarm), MP_ROM_PTR(&alarm_restart_on_alarm_obj) },

    { MP_ROM_QSTR(MP_QSTR_pin), MP_ROM_PTR(&alarm_pin_module) },
    { MP_ROM_QSTR(MP_QSTR_time), MP_ROM_PTR(&alarm_time_module) }

};
STATIC MP_DEFINE_MUTABLE_DICT(alarm_module_globals, alarm_module_globals_table);

void common_hal_alarm_set_wake_alarm(mp_obj_t alarm) {
    // Equivalent of:
    // alarm.wake_alarm = alarm
    mp_map_elem_t *elem =
        mp_map_lookup(&alarm_module_globals_table, MP_ROM_QSTR(MP_QSTR_wake_alarm), MP_MAP_LOOKUP);
    if (elem) {
        elem->value = alarm;
    }
}

alarm_reset_reason_t common_hal_alarm_get_reset_reason(void) {
    mp_map_elem_t *elem =
        mp_map_lookup(&alarm_module_globals_table, MP_ROM_QSTR(MP_QSTR_reset_reason), MP_MAP_LOOKUP);
    if (elem) {
        return elem->value;
    } else {
        return mp_const_none;
    }
}

void common_hal_alarm_set_reset_reason(mp_obj_t reset_reason) {
    // Equivalent of:
    // alarm.reset_reason = reset_reason
    mp_map_elem_t *elem =
        mp_map_lookup(&alarm_module_globals_table, MP_ROM_QSTR(MP_QSTR_reset_reason), MP_MAP_LOOKUP);
    if (elem) {
        elem->value = reset_reason;
    }
}

const mp_obj_module_t alarm_module = {
    .base = { &mp_type_module },
    .globals = (mp_obj_dict_t*)&alarm_module_globals,
};