circuitpython/ports/nrf/common-hal/alarm/__init__.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
* Copyright (c) 2020 Dan Halbert for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/gc.h"
#include "py/obj.h"
#include "py/objtuple.h"
#include "py/runtime.h"
#include <stdio.h>
#include <string.h>
#include "shared-bindings/alarm/__init__.h"
#include "shared-bindings/alarm/SleepMemory.h"
#include "shared-bindings/alarm/pin/PinAlarm.h"
#include "shared-bindings/alarm/time/TimeAlarm.h"
#include "shared-bindings/alarm/touch/TouchAlarm.h"
#include "supervisor/port.h"
#ifdef NRF_DEBUG_PRINT
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#include "supervisor/serial.h" // dbg_printf()
#endif
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#include "nrf.h"
#include "nrf_power.h"
#include "nrfx.h"
#include "nrfx_gpiote.h"
// Singleton instance of SleepMemory.
const alarm_sleep_memory_obj_t alarm_sleep_memory_obj = {
.base = {
.type = &alarm_sleep_memory_type,
},
};
void alarm_reset(void) {
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alarm_sleep_memory_reset();
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alarm_pin_pinalarm_reset();
alarm_time_timealarm_reset();
alarm_touch_touchalarm_reset();
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}
extern uint32_t reset_reason_saved;
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STATIC nrf_sleep_source_t _get_wakeup_cause(void) {
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if (alarm_pin_pinalarm_woke_us_up()) {
return NRF_SLEEP_WAKEUP_GPIO;
}
if (alarm_time_timealarm_woke_us_up()) {
return NRF_SLEEP_WAKEUP_TIMER;
}
if (alarm_touch_touchalarm_woke_us_up()) {
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return NRF_SLEEP_WAKEUP_TOUCHPAD;
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}
if (reset_reason_saved & NRF_POWER_RESETREAS_RESETPIN_MASK) {
return NRF_SLEEP_WAKEUP_RESETPIN;
}
else if (reset_reason_saved & NRF_POWER_RESETREAS_OFF_MASK) {
return NRF_SLEEP_WAKEUP_GPIO;
}
else if (reset_reason_saved & NRF_POWER_RESETREAS_VBUS_MASK) {
return NRF_SLEEP_WAKEUP_VBUS;
}
return NRF_SLEEP_WAKEUP_UNDEFINED;
}
bool alarm_woken_from_sleep(void) {
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nrf_sleep_source_t cause = _get_wakeup_cause();
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return (cause == NRF_SLEEP_WAKEUP_GPIO || cause == NRF_SLEEP_WAKEUP_TIMER
|| cause == NRF_SLEEP_WAKEUP_TOUCHPAD
|| cause == NRF_SLEEP_WAKEUP_RESETPIN);
}
#ifdef NRF_DEBUG_PRINT
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static const char* cause_str[] = {
"UNDEFINED",
"GPIO",
"TIMER",
"TOUCHPAD",
"VBUS",
"RESETPIN",
};
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void print_wakeup_cause(nrf_sleep_source_t cause) {
if (cause >= 0 && cause < NRF_SLEEP_WAKEUP_ZZZ) {
dbg_printf("wakeup cause = NRF_SLEEP_WAKEUP_%s\r\n",
cause_str[(int)cause]);
}
}
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#endif
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STATIC mp_obj_t _get_wake_alarm(size_t n_alarms, const mp_obj_t *alarms) {
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nrf_sleep_source_t cause = _get_wakeup_cause();
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#ifdef NRF_DEBUG_PRINT
//print_wakeup_cause(cause);
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#endif
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switch (cause) {
case NRF_SLEEP_WAKEUP_TIMER: {
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return alarm_time_timealarm_get_wakeup_alarm(n_alarms, alarms);
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}
case NRF_SLEEP_WAKEUP_TOUCHPAD: {
return alarm_touch_touchalarm_get_wakeup_alarm(n_alarms, alarms);
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}
case NRF_SLEEP_WAKEUP_GPIO: {
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return alarm_pin_pinalarm_get_wakeup_alarm(n_alarms, alarms);
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}
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default:
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break;
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}
return mp_const_none;
}
mp_obj_t common_hal_alarm_get_wake_alarm(void) {
mp_obj_t obj = _get_wake_alarm(0, NULL);
return obj;
}
// Set up light sleep or deep sleep alarms.
STATIC void _setup_sleep_alarms(bool deep_sleep, size_t n_alarms, const mp_obj_t *alarms) {
alarm_pin_pinalarm_set_alarms(deep_sleep, n_alarms, alarms);
alarm_time_timealarm_set_alarms(deep_sleep, n_alarms, alarms);
alarm_touch_touchalarm_set_alarm(deep_sleep, n_alarms, alarms);
}
STATIC void _idle_until_alarm(void) {
#ifdef NRF_DEBUG_PRINT
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int ct = 40;
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#endif
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reset_reason_saved = 0;
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// Poll for alarms.
while (!mp_hal_is_interrupted()) {
RUN_BACKGROUND_TASKS;
// Allow ctrl-C interrupt.
if (alarm_woken_from_sleep()) {
alarm_save_wake_alarm();
#ifdef NRF_DEBUG_PRINT
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int cause = _get_wakeup_cause();
printf("wakeup(%d)\r\n", cause);
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#endif
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return;
}
port_idle_until_interrupt();
#ifdef NRF_DEBUG_PRINT
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if (ct > 0) {
printf("_");
--ct;
}
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#endif
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}
}
mp_obj_t common_hal_alarm_light_sleep_until_alarms(size_t n_alarms, const mp_obj_t *alarms) {
mp_obj_t r_obj = mp_const_none;
_setup_sleep_alarms(false, n_alarms, alarms);
#ifdef NRF_DEBUG_PRINT
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dbg_printf("\r\nsleep...");
#endif
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_idle_until_alarm();
if (mp_hal_is_interrupted()) {
#ifdef NRF_DEBUG_PRINT
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dbg_printf("mp_hal_is_interrupted\r\n");
#endif
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r_obj = mp_const_none;
}
else {
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r_obj = _get_wake_alarm(n_alarms, alarms);
alarm_reset();
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}
return r_obj;
}
void common_hal_alarm_set_deep_sleep_alarms(size_t n_alarms, const mp_obj_t *alarms) {
_setup_sleep_alarms(true, n_alarms, alarms);
}
extern void set_memory_retention(void);
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void NORETURN alarm_enter_deep_sleep(void) {
alarm_pin_pinalarm_prepare_for_deep_sleep();
alarm_touch_touchalarm_prepare_for_deep_sleep();
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uint8_t sd_enabled;
sd_softdevice_is_enabled(&sd_enabled);
set_memory_retention();
#ifdef NRF_DEBUG_PRINT
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dbg_printf("go system off.. %d\r\n", sd_enabled);
#endif
if (sd_enabled) {
sd_power_system_off();
}
else {
NRF_POWER->SYSTEMOFF = 1;
}
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// should not reach here..
while(1) ;
}
void common_hal_alarm_gc_collect(void) {
void* p = alarm_get_wake_alarm();
gc_collect_ptr(p);
}