circuitpython/shared-bindings/countio/Counter.c

150 lines
5.9 KiB
C

#include <stdint.h>
#include "shared/runtime/context_manager_helpers.h"
#include "py/objproperty.h"
#include "py/runtime.h"
#include "py/runtime0.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared-bindings/countio/Counter.h"
#include "shared-bindings/countio/Edge.h"
#include "shared-bindings/util.h"
//| class Counter:
//| """Count the number of rising- and/or falling-edge transitions on a given pin."""
//|
//| def __init__(
//| self,
//| pin: microcontroller.Pin,
//| *,
//| edge: Edge = Edge.FALL,
//| pull: Optional[digitalio.Pull] = None
//| ) -> None:
//| """Create a Counter object associated with the given pin that counts
//| rising- and/or falling-edge transitions. At least one of ``rise`` and ``fall`` must be True.
//| The default is to count only falling edges, and is for historical backward compatibility.
//|
//| :param ~microcontroller.Pin pin: pin to monitor
//| :param Edge edge: which edge transitions to count
//| :param Optional[digitalio.Pull] pull: enable a pull-up or pull-down if not None
//|
//|
//| For example::
//|
//| import board
//| import countio
//|
//| # Count rising edges only.
//| pin_counter = countio.Counter(board.D1, edge=countio.Edge.RISE)
//| # Reset the count after 100 counts.
//| while True:
//| if pin_counter.count >= 100:
//| pin_counter.reset()
//| print(pin_counter.count)
//| """
//| ...
STATIC mp_obj_t countio_counter_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
enum { ARG_pin, ARG_edge, ARG_pull };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_pin, MP_ARG_REQUIRED | MP_ARG_OBJ },
{ MP_QSTR_edge, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_FROM_PTR(&edge_FALL_obj) } },
{ MP_QSTR_pull, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
};
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);
const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[ARG_pin].u_obj, MP_QSTR_pin);
const countio_edge_t edge = validate_edge(args[ARG_edge].u_obj, MP_QSTR_edge);
const digitalio_pull_t pull = validate_pull(args[ARG_pull].u_obj, MP_QSTR_pull);
// Make long-lived because some implementations use a pointer to the object as interrupt-handler data.
countio_counter_obj_t *self = m_new_ll_obj(countio_counter_obj_t);
self->base.type = &countio_counter_type;
common_hal_countio_counter_construct(self, pin, edge, pull);
return MP_OBJ_FROM_PTR(self);
}
//| def deinit(self) -> None:
//| """Deinitializes the Counter and releases any hardware resources for reuse."""
STATIC mp_obj_t countio_counter_deinit(mp_obj_t self_in) {
countio_counter_obj_t *self = MP_OBJ_TO_PTR(self_in);
common_hal_countio_counter_deinit(self);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(countio_counter_deinit_obj, countio_counter_deinit);
STATIC void check_for_deinit(countio_counter_obj_t *self) {
if (common_hal_countio_counter_deinited(self)) {
raise_deinited_error();
}
}
//| def __enter__(self) -> Counter:
//| """No-op used by Context Managers."""
// Provided by context manager helper.
//| def __exit__(self) -> None:
//| """Automatically deinitializes the hardware when exiting a context. See
//| :ref:`lifetime-and-contextmanagers` for more info."""
STATIC mp_obj_t countio_counter_obj___exit__(size_t n_args, const mp_obj_t *args) {
(void)n_args;
common_hal_countio_counter_deinit(args[0]);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(countio_counter___exit___obj, 4, 4, countio_counter_obj___exit__);
//| count: int
//| """The current count in terms of pulses."""
STATIC mp_obj_t countio_counter_obj_get_count(mp_obj_t self_in) {
countio_counter_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
return mp_obj_new_int(common_hal_countio_counter_get_count(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(countio_counter_get_count_obj, countio_counter_obj_get_count);
STATIC mp_obj_t countio_counter_obj_set_count(mp_obj_t self_in, mp_obj_t new_count) {
countio_counter_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
common_hal_countio_counter_set_count(self, mp_obj_get_int(new_count));
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(countio_counter_set_count_obj, countio_counter_obj_set_count);
MP_PROPERTY_GETSET(countio_counter_count_obj,
(mp_obj_t)&countio_counter_get_count_obj,
(mp_obj_t)&countio_counter_set_count_obj);
//| def reset(self) -> None:
//| """Resets the count back to 0."""
//|
STATIC mp_obj_t countio_counter_reset(mp_obj_t self_in) {
countio_counter_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
common_hal_countio_counter_set_count(self, 0);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(countio_counter_reset_obj, countio_counter_reset);
STATIC const mp_rom_map_elem_t countio_counter_locals_dict_table[] = {
// Methods
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&countio_counter_deinit_obj) },
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&countio_counter___exit___obj) },
{ MP_ROM_QSTR(MP_QSTR_count), MP_ROM_PTR(&countio_counter_count_obj) },
{ MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&countio_counter_reset_obj) },
};
STATIC MP_DEFINE_CONST_DICT(countio_counter_locals_dict, countio_counter_locals_dict_table);
const mp_obj_type_t countio_counter_type = {
{ &mp_type_type },
.name = MP_QSTR_Counter,
.make_new = countio_counter_make_new,
.locals_dict = (mp_obj_dict_t *)&countio_counter_locals_dict,
};