155 lines
6.2 KiB
C
155 lines
6.2 KiB
C
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#include <stdint.h>
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#include "shared/runtime/context_manager_helpers.h"
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#include "py/objproperty.h"
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#include "py/runtime.h"
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#include "py/runtime0.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/countio/Counter.h"
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#include "shared-bindings/countio/Edge.h"
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#include "shared-bindings/util.h"
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//| class Counter:
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//| """Count the number of rising- and/or falling-edge transitions on a given pin."""
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//|
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//| def __init__(
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//| self,
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//| pin: microcontroller.Pin,
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//| *,
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//| edge: Edge = Edge.FALL,
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//| pull: Optional[digitalio.Pull] = None
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//| ) -> None:
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//| """Create a Counter object associated with the given pin that counts
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//| rising- and/or falling-edge transitions. At least one of ``rise`` and ``fall`` must be True.
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//| The default is to count only falling edges, and is for historical backward compatibility.
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//|
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//| :param ~microcontroller.Pin pin: pin to monitor
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//| :param Edge edge: which edge transitions to count
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//| :param Optional[digitalio.Pull] pull: enable a pull-up or pull-down if not None
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//|
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//|
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//| For example::
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//|
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//| import board
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//| import countio
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//|
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//| # Count rising edges only.
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//| pin_counter = countio.Counter(board.D1, edge=countio.Edge.RISE)
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//| # Reset the count after 100 counts.
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//| while True:
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//| if pin_counter.count >= 100:
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//| pin_counter.reset()
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//| print(pin_counter.count)
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//|
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//| **Limitations:** On RP2040, `Counter` uses the PWM peripheral, and
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//| is limited to using PWM channel B pins due to hardware restrictions.
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//| See the pin assignments for your board to see which pins can be used.
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//| """
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//| ...
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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) {
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enum { ARG_pin, ARG_edge, ARG_pull };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_pin, MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_edge, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_FROM_PTR(&edge_FALL_obj) } },
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{ MP_QSTR_pull, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[ARG_pin].u_obj, MP_QSTR_pin);
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const countio_edge_t edge = validate_edge(args[ARG_edge].u_obj, MP_QSTR_edge);
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const digitalio_pull_t pull = validate_pull(args[ARG_pull].u_obj, MP_QSTR_pull);
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// Make long-lived because some implementations use a pointer to the object as interrupt-handler data.
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countio_counter_obj_t *self = m_new_ll_obj_with_finaliser(countio_counter_obj_t);
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self->base.type = &countio_counter_type;
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common_hal_countio_counter_construct(self, pin, edge, pull);
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return MP_OBJ_FROM_PTR(self);
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}
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//| def deinit(self) -> None:
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//| """Deinitializes the Counter and releases any hardware resources for reuse."""
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STATIC mp_obj_t countio_counter_deinit(mp_obj_t self_in) {
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countio_counter_obj_t *self = MP_OBJ_TO_PTR(self_in);
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common_hal_countio_counter_deinit(self);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(countio_counter_deinit_obj, countio_counter_deinit);
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STATIC void check_for_deinit(countio_counter_obj_t *self) {
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if (common_hal_countio_counter_deinited(self)) {
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raise_deinited_error();
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}
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}
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//| def __enter__(self) -> Counter:
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//| """No-op used by Context Managers."""
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// Provided by context manager helper.
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//| def __exit__(self) -> None:
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//| """Automatically deinitializes the hardware when exiting a context. See
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//| :ref:`lifetime-and-contextmanagers` for more info."""
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STATIC mp_obj_t countio_counter_obj___exit__(size_t n_args, const mp_obj_t *args) {
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(void)n_args;
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common_hal_countio_counter_deinit(args[0]);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(countio_counter___exit___obj, 4, 4, countio_counter_obj___exit__);
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//| count: int
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//| """The current count in terms of pulses."""
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STATIC mp_obj_t countio_counter_obj_get_count(mp_obj_t self_in) {
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countio_counter_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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return mp_obj_new_int(common_hal_countio_counter_get_count(self));
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}
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MP_DEFINE_CONST_FUN_OBJ_1(countio_counter_get_count_obj, countio_counter_obj_get_count);
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STATIC mp_obj_t countio_counter_obj_set_count(mp_obj_t self_in, mp_obj_t new_count) {
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countio_counter_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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common_hal_countio_counter_set_count(self, mp_obj_get_int(new_count));
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(countio_counter_set_count_obj, countio_counter_obj_set_count);
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MP_PROPERTY_GETSET(countio_counter_count_obj,
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(mp_obj_t)&countio_counter_get_count_obj,
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(mp_obj_t)&countio_counter_set_count_obj);
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//| def reset(self) -> None:
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//| """Resets the count back to 0."""
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//|
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STATIC mp_obj_t countio_counter_reset(mp_obj_t self_in) {
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countio_counter_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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common_hal_countio_counter_set_count(self, 0);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(countio_counter_reset_obj, countio_counter_reset);
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STATIC const mp_rom_map_elem_t countio_counter_locals_dict_table[] = {
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// Methods
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&countio_counter_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&countio_counter_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
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{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&countio_counter___exit___obj) },
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{ MP_ROM_QSTR(MP_QSTR_count), MP_ROM_PTR(&countio_counter_count_obj) },
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{ MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&countio_counter_reset_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(countio_counter_locals_dict, countio_counter_locals_dict_table);
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const mp_obj_type_t countio_counter_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Counter,
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.make_new = countio_counter_make_new,
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.locals_dict = (mp_obj_dict_t *)&countio_counter_locals_dict,
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};
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