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micropython/ports/mimxrt/machine_rtc.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Damien P. George
* Copyright (c) 2021 "Robert Hammelrath" <robert@hammelrath.com>
*
* 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/mperrno.h"
#include "py/runtime.h"
#include "shared/runtime/mpirq.h"
#include "shared/timeutils/timeutils.h"
#include "modmachine.h"
#include "ticks.h"
#include "fsl_snvs_lp.h"
#include "fsl_snvs_hp.h"
STATIC mp_int_t timeout = 0;
void machine_rtc_alarm_clear_en(void) {
SNVS_LP_SRTC_DisableInterrupts(SNVS, SNVS_LPCR_LPTA_EN_MASK);
while (SNVS->LPCR & SNVS_LPCR_LPTA_EN_MASK) {
}
}
void machine_rtc_alarm_set_en() {
SNVS_LP_SRTC_EnableInterrupts(SNVS, SNVS_LPCR_LPTA_EN_MASK);
while (!(SNVS->LPCR & SNVS_LPCR_LPTA_EN_MASK)) {
}
}
void machine_rtc_alarm_off(bool clear) {
machine_rtc_alarm_clear_en();
#ifdef MIMXRT117x_SERIES
DisableIRQ(SNVS_HP_NON_TZ_IRQn);
#else
DisableIRQ(SNVS_HP_WRAPPER_IRQn);
#endif
if (clear) {
SNVS->LPTAR = 0;
timeout = 0;
SNVS->LPSR = SNVS_LPSR_LPTA_MASK;
}
}
void machine_rtc_alarm_on() {
#ifdef MIMXRT117x_SERIES
EnableIRQ(SNVS_HP_NON_TZ_IRQn);
#else
EnableIRQ(SNVS_HP_WRAPPER_IRQn);
#endif
machine_rtc_alarm_set_en();
}
uint32_t machine_rtc_get_seconds() {
uint32_t seconds = 0;
uint32_t tmp = 0;
// Do consecutive reads until value is correct
do {
seconds = tmp;
tmp = (SNVS->LPSRTCMR << 17U);
tmp |= (SNVS->LPSRTCLR >> 15U);
} while (tmp != seconds);
return seconds;
}
void machine_rtc_alarm_helper(int seconds, bool repeat) {
machine_rtc_alarm_off(true);
SNVS->LPTAR = machine_rtc_get_seconds() + seconds;
if (repeat) {
timeout = seconds;
}
machine_rtc_alarm_on();
}
typedef struct _machine_rtc_irq_obj_t {
mp_irq_obj_t base;
} machine_rtc_irq_obj_t;
STATIC mp_uint_t machine_rtc_irq_trigger(mp_obj_t self_in, mp_uint_t new_trigger) {
new_trigger /= 1000;
if (!new_trigger) {
machine_rtc_alarm_off(true);
} else {
machine_rtc_alarm_helper(new_trigger, true);
}
return 0;
}
STATIC mp_uint_t machine_rtc_irq_info(mp_obj_t self_in, mp_uint_t info_type) {
return 0;
}
STATIC const mp_irq_methods_t machine_rtc_irq_methods = {
.trigger = machine_rtc_irq_trigger,
.info = machine_rtc_irq_info,
};
void SNVS_HP_WRAPPER_IRQHandler(void) {
if (SNVS->LPSR & SNVS_LPSR_LPTA_MASK) {
SNVS->LPSR = SNVS_LPSR_LPTA_MASK;
machine_rtc_irq_obj_t *irq = MP_STATE_PORT(machine_rtc_irq_object);
if (irq != NULL) {
mp_irq_handler(&irq->base);
}
if (timeout > 0) {
machine_rtc_alarm_clear_en();
SNVS->LPTAR += timeout;
machine_rtc_alarm_set_en();
}
}
}
// Deinit rtc IRQ handler.
void machine_rtc_irq_deinit(void) {
machine_rtc_alarm_off(true);
MP_STATE_PORT(machine_rtc_irq_object) = NULL;
}
typedef struct _machine_rtc_obj_t {
mp_obj_base_t base;
} machine_rtc_obj_t;
// Singleton RTC object.
STATIC const machine_rtc_obj_t machine_rtc_obj = {{&machine_rtc_type}};
// Start the RTC Timer.
void machine_rtc_start(void) {
// Enable Non-Privileged Software Access
SNVS->HPCOMR |= SNVS_HPCOMR_NPSWA_EN_MASK;
// Do a basic init.
SNVS_LP_Init(SNVS);
// Disable all external Tamper
SNVS_LP_DisableAllExternalTamper(SNVS);
SNVS_LP_SRTC_StartTimer(SNVS);
// If the date is not set, set it to a more recent start date,
// MicroPython's first commit.
snvs_lp_srtc_datetime_t srtc_date;
SNVS_LP_SRTC_GetDatetime(SNVS, &srtc_date);
if (srtc_date.year <= 1970) {
srtc_date = (snvs_lp_srtc_datetime_t) {
.year = 2013,
.month = 10,
.day = 14,
.hour = 19,
.minute = 53,
.second = 11,
};
SNVS_LP_SRTC_SetDatetime(SNVS, &srtc_date);
}
}
STATIC mp_obj_t machine_rtc_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
// Check arguments.
mp_arg_check_num(n_args, n_kw, 0, 0, false);
// Return constant object.
return (mp_obj_t)&machine_rtc_obj;
}
STATIC mp_obj_t machine_rtc_datetime_helper(size_t n_args, const mp_obj_t *args) {
if (n_args == 1) {
// Get date and time.
snvs_lp_srtc_datetime_t srtc_date;
SNVS_LP_SRTC_GetDatetime(SNVS, &srtc_date);
mp_obj_t tuple[8] = {
mp_obj_new_int(srtc_date.year),
mp_obj_new_int(srtc_date.month),
mp_obj_new_int(srtc_date.day),
mp_obj_new_int(timeutils_calc_weekday(srtc_date.year, srtc_date.month, srtc_date.day)),
mp_obj_new_int(srtc_date.hour),
mp_obj_new_int(srtc_date.minute),
mp_obj_new_int(srtc_date.second),
mp_obj_new_int(0),
};
return mp_obj_new_tuple(8, tuple);
} else {
// Set date and time.
mp_obj_t *items;
mp_int_t year;
mp_obj_get_array_fixed_n(args[1], 8, &items);
snvs_lp_srtc_datetime_t srtc_date;
year = mp_obj_get_int(items[0]);
srtc_date.year = year >= 100 ? year : year + 2000; // allow 21 for 2021
srtc_date.month = mp_obj_get_int(items[1]);
srtc_date.day = mp_obj_get_int(items[2]);
// Ignore weekday at items[3]
srtc_date.hour = mp_obj_get_int(items[4]);
srtc_date.minute = mp_obj_get_int(items[5]);
srtc_date.second = mp_obj_get_int(items[6]);
if (SNVS_LP_SRTC_SetDatetime(SNVS, &srtc_date) != kStatus_Success) {
mp_raise_ValueError(NULL);
}
return mp_const_none;
}
}
STATIC mp_obj_t machine_rtc_datetime(mp_uint_t n_args, const mp_obj_t *args) {
return machine_rtc_datetime_helper(n_args, args);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_rtc_datetime_obj, 1, 2, machine_rtc_datetime);
STATIC mp_obj_t machine_rtc_now(mp_obj_t self_in) {
// Get date and time in CPython order.
snvs_lp_srtc_datetime_t srtc_date;
SNVS_LP_SRTC_GetDatetime(SNVS, &srtc_date);
mp_obj_t tuple[8] = {
mp_obj_new_int(srtc_date.year),
mp_obj_new_int(srtc_date.month),
mp_obj_new_int(srtc_date.day),
mp_obj_new_int(srtc_date.hour),
mp_obj_new_int(srtc_date.minute),
mp_obj_new_int(srtc_date.second),
mp_obj_new_int(0),
mp_const_none,
};
return mp_obj_new_tuple(8, tuple);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_rtc_now_obj, machine_rtc_now);
STATIC mp_obj_t machine_rtc_init(mp_obj_t self_in, mp_obj_t date) {
mp_obj_t args[2] = {self_in, date};
machine_rtc_datetime_helper(2, args);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_rtc_init_obj, machine_rtc_init);
// calibration(cal)
// When the argument is a number in the range [-16 to 15], set the calibration value.
STATIC mp_obj_t machine_rtc_calibration(mp_obj_t self_in, mp_obj_t cal_in) {
mp_int_t cal = 0;
snvs_lp_srtc_config_t snvsSrtcConfig;
cal = mp_obj_get_int(cal_in);
if (cal < -16 || cal > 15) {
mp_raise_ValueError(MP_ERROR_TEXT("value out of range -16 to 15"));
} else {
snvsSrtcConfig.srtcCalEnable = true;
snvsSrtcConfig.srtcCalValue = cal & 0x1f; // 5 bit 2's complement
SNVS_LP_SRTC_Init(SNVS, &snvsSrtcConfig);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_rtc_calibration_obj, machine_rtc_calibration);
STATIC mp_obj_t machine_rtc_alarm(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
STATIC const mp_arg_t allowed_args[] = {
{ MP_QSTR_id, MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_time, MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_repeat, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), allowed_args, args);
// check the alarm id
if (args[0].u_int != 0) {
mp_raise_OSError(MP_ENODEV);
}
mp_int_t seconds = 0;
snvs_lp_srtc_datetime_t srtc_date;
bool repeat = args[2].u_bool;
if (mp_obj_is_type(args[1].u_obj, &mp_type_tuple)) { // datetime tuple given
// repeat cannot be used with a datetime tuple
if (repeat) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid argument(s) value"));
}
// Set date and time.
mp_obj_t *items;
mp_int_t year;
mp_obj_get_array_fixed_n(args[1].u_obj, 8, &items);
year = mp_obj_get_int(items[0]);
srtc_date.year = year >= 100 ? year : year + 2000; // allow 21 for 2021
srtc_date.month = mp_obj_get_int(items[1]);
srtc_date.day = mp_obj_get_int(items[2]);
// Ignore weekday at items[3]
srtc_date.hour = mp_obj_get_int(items[4]);
srtc_date.minute = mp_obj_get_int(items[5]);
srtc_date.second = mp_obj_get_int(items[6]);
machine_rtc_alarm_off(true);
if (SNVS_LP_SRTC_SetAlarm(SNVS, &srtc_date) != kStatus_Success) {
mp_raise_ValueError(NULL);
}
machine_rtc_alarm_on();
} else { // then it must be an integer
seconds = (args[1].u_obj == mp_const_none) ? 0 : (mp_obj_get_int(args[1].u_obj) / 1000);
machine_rtc_alarm_helper(seconds, repeat);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_rtc_alarm_obj, 1, machine_rtc_alarm);
STATIC mp_obj_t machine_rtc_alarm_left(size_t n_args, const mp_obj_t *args) {
// only alarm id 0 is available
if (n_args > 1 && mp_obj_get_int(args[1]) != 0) {
mp_raise_OSError(MP_ENODEV);
}
uint32_t seconds = machine_rtc_get_seconds();
uint32_t alarmSeconds = SNVS->LPTAR;
return mp_obj_new_int((alarmSeconds >= seconds) ? ((alarmSeconds - seconds) * 1000) : 0);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_rtc_alarm_left_obj, 1, 2, machine_rtc_alarm_left);
STATIC mp_obj_t machine_rtc_alarm_cancel(size_t n_args, const mp_obj_t *args) {
// only alarm id 0 is available
if (n_args > 1 && mp_obj_get_int(args[1]) != 0) {
mp_raise_OSError(MP_ENODEV);
}
machine_rtc_alarm_off(true);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_rtc_alarm_cancel_obj, 1, 2, machine_rtc_alarm_cancel);
STATIC mp_obj_t machine_rtc_irq(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_trigger, ARG_handler, ARG_wake, ARG_hard };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_trigger, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_handler, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_wake, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_hard, MP_ARG_BOOL, {.u_bool = false} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// check we want alarm0
if (args[ARG_trigger].u_int != 0) {
mp_raise_OSError(MP_ENODEV);
}
machine_rtc_irq_obj_t *irq = MP_STATE_PORT(machine_rtc_irq_object);
// Allocate the IRQ object if it doesn't already exist.
if (irq == NULL) {
irq = m_new_obj(machine_rtc_irq_obj_t);
irq->base.base.type = &mp_irq_type;
irq->base.methods = (mp_irq_methods_t *)&machine_rtc_irq_methods;
irq->base.parent = MP_OBJ_FROM_PTR(pos_args[0]);
irq->base.handler = mp_const_none;
irq->base.ishard = args[ARG_hard].u_bool;
MP_STATE_PORT(machine_rtc_irq_object) = irq;
}
machine_rtc_alarm_off(false);
irq->base.handler = args[ARG_handler].u_obj;
if (SNVS->LPTAR) {
machine_rtc_alarm_on();
}
return MP_OBJ_FROM_PTR(irq);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_rtc_irq_obj, 1, machine_rtc_irq);
STATIC const mp_rom_map_elem_t machine_rtc_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_rtc_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_datetime), MP_ROM_PTR(&machine_rtc_datetime_obj) },
{ MP_ROM_QSTR(MP_QSTR_now), MP_ROM_PTR(&machine_rtc_now_obj) },
{ MP_ROM_QSTR(MP_QSTR_calibration), MP_ROM_PTR(&machine_rtc_calibration_obj) },
{ MP_ROM_QSTR(MP_QSTR_alarm), MP_ROM_PTR(&machine_rtc_alarm_obj) },
{ MP_ROM_QSTR(MP_QSTR_alarm_left), MP_ROM_PTR(&machine_rtc_alarm_left_obj) },
{ MP_ROM_QSTR(MP_QSTR_alarm_cancel), MP_ROM_PTR(&machine_rtc_alarm_cancel_obj) },
{ MP_ROM_QSTR(MP_QSTR_cancel), MP_ROM_PTR(&machine_rtc_alarm_cancel_obj) },
{ MP_ROM_QSTR(MP_QSTR_irq), MP_ROM_PTR(&machine_rtc_irq_obj) },
{ MP_ROM_QSTR(MP_QSTR_ALARM0), MP_ROM_INT(0) },
};
STATIC MP_DEFINE_CONST_DICT(machine_rtc_locals_dict, machine_rtc_locals_dict_table);
MP_DEFINE_CONST_OBJ_TYPE(
machine_rtc_type,
MP_QSTR_RTC,
MP_TYPE_FLAG_NONE,
make_new, machine_rtc_make_new,
locals_dict, &machine_rtc_locals_dict
);
MP_REGISTER_ROOT_POINTER(void *machine_rtc_irq_object);
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