circuitpython/nrf5/modules/machine/rtc.c

220 lines
6.8 KiB
C

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Glenn Ruben Bakke
*
* 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 <stdio.h>
#include <string.h>
#include "py/nlr.h"
#include "py/runtime.h"
#include "py/mphal.h"
#include "rtc.h"
#include "hal_rtc.h"
#if MICROPY_PY_MACHINE_RTC
typedef struct _machine_rtc_obj_t {
mp_obj_base_t base;
RTC_HandleTypeDef *rtc;
mp_obj_t callback;
mp_int_t period;
mp_int_t mode;
} machine_rtc_obj_t;
RTC_HandleTypeDef RTCHandle0 = {.config.p_instance = NULL, .id = 0};
RTC_HandleTypeDef RTCHandle1 = {.config.p_instance = NULL, .id = 1};
STATIC machine_rtc_obj_t machine_rtc_obj[] = {
{{&machine_rtc_type}, &RTCHandle0},
{{&machine_rtc_type}, &RTCHandle1},
};
STATIC void hal_interrupt_handle(NRF_RTC_Type * p_instance) {
const machine_rtc_obj_t * self = NULL;
if (p_instance == RTC0) {
self = &machine_rtc_obj[0];
mp_call_function_0(self->callback);
} else if (p_instance == RTC1) {
self = &machine_rtc_obj[1];
mp_call_function_0(self->callback);
}
#if NRF52
else if (p_instance == RTC2) {
self = &machine_rtc_obj[2];
mp_call_function_0(self->callback);
}
#endif
if (self != NULL) {
hal_rtc_stop(&self->rtc->config);
if (self->mode == 1) {
hal_rtc_start(&self->rtc->config, self->period);
}
}
}
void rtc_init0(void) {
hal_rtc_callback_set(hal_interrupt_handle);
// reset the RTC handles
memset(&RTCHandle0, 0, sizeof(RTC_HandleTypeDef));
RTCHandle0.config.p_instance = RTC0;
RTCHandle0.config.irq_num = RTC0_IRQ_NUM;
#if (BLUETOOTH_SD == 100)
RTCHandle0.config.irq_priority = 3;
#else
RTCHandle0.config.irq_priority = 6;
#endif
memset(&RTCHandle1, 0, sizeof(RTC_HandleTypeDef));
RTCHandle1.config.p_instance = RTC1;
RTCHandle1.config.irq_num = RTC1_IRQ_NUM;
#if (BLUETOOTH_SD == 100)
RTCHandle1.config.irq_priority = 3;
#else
RTCHandle1.config.irq_priority = 6;
#endif
}
STATIC int rtc_find(mp_obj_t id) {
// given an integer id
int rtc_id = mp_obj_get_int(id);
if (rtc_id >= 0 && rtc_id <= MP_ARRAY_SIZE(machine_rtc_obj)
&& machine_rtc_obj[rtc_id].rtc != NULL) {
return rtc_id;
}
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
"RTC(%d) does not exist", rtc_id));
}
STATIC void rtc_print(const mp_print_t *print, mp_obj_t o, mp_print_kind_t kind) {
machine_rtc_obj_t *self = o;
mp_printf(print, "RTC(%u)", self->rtc->id);
}
/******************************************************************************/
/* MicroPython bindings for machine API */
/*
from machine import RTC
def cb():
print("Callback")
r = RTC(0, 8, cb, mode=RTC.PERIODIC)
r.start(16)
*/
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 *all_args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_id, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_frequency, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_callback, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_mode, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
if (args[0].u_obj == MP_OBJ_NEW_SMALL_INT(-1)) {
// index -1 does not exist
return mp_const_none;
// TODO: raise exception
}
// get static peripheral object
int rtc_id = rtc_find(args[0].u_obj);
// unconst machine object in order to set a callback.
machine_rtc_obj_t * self = (machine_rtc_obj_t *)&machine_rtc_obj[rtc_id];
mp_obj_t freq_obj = args[1].u_obj;
if (freq_obj != mp_const_none && MP_OBJ_IS_INT(freq_obj)) {
self->rtc->config.frequency = mp_obj_get_int(freq_obj);
} else {
// raise exception
}
if (args[2].u_obj != mp_const_none) {
self->callback = args[2].u_obj;
}
self->mode = args[3].u_int;
hal_rtc_init(&self->rtc->config);
return MP_OBJ_FROM_PTR(self);
}
/// \method start(period)
/// Start the RTC timer. Timeout occurs after number of periods
/// in the configured frequency has been reached.
///
STATIC mp_obj_t machine_rtc_start(mp_obj_t self_in, mp_obj_t period_in) {
machine_rtc_obj_t * self = MP_OBJ_TO_PTR(self_in);
mp_int_t period = mp_obj_get_int(period_in);
self->period = mp_obj_get_int(period_in);
hal_rtc_start(&self->rtc->config, period);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_rtc_start_obj, machine_rtc_start);
/// \method stop()
/// Stop the RTC timer.
///
STATIC mp_obj_t machine_rtc_stop(mp_obj_t self_in) {
machine_rtc_obj_t * self = MP_OBJ_TO_PTR(self_in);
hal_rtc_stop(&self->rtc->config);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_rtc_stop_obj, machine_rtc_stop);
STATIC const mp_map_elem_t machine_rtc_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_start), (mp_obj_t)(&machine_rtc_start_obj) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_stop), (mp_obj_t)(&machine_rtc_stop_obj) },
// constants
{ MP_OBJ_NEW_QSTR(MP_QSTR_ONESHOT), MP_OBJ_NEW_SMALL_INT(0) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_PERIODIC), MP_OBJ_NEW_SMALL_INT(1) },
};
STATIC MP_DEFINE_CONST_DICT(machine_rtc_locals_dict, machine_rtc_locals_dict_table);
const mp_obj_type_t machine_rtc_type = {
{ &mp_type_type },
.name = MP_QSTR_RTC,
.print = rtc_print,
.make_new = machine_rtc_make_new,
.locals_dict = (mp_obj_t)&machine_rtc_locals_dict
};
#endif // MICROPY_PY_MACHINE_RTC