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Diffstat (limited to 'circuitpython/shared-bindings/countio/Counter.c')
| -rw-r--r-- | circuitpython/shared-bindings/countio/Counter.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/circuitpython/shared-bindings/countio/Counter.c b/circuitpython/shared-bindings/countio/Counter.c new file mode 100644 index 0000000..1914124 --- /dev/null +++ b/circuitpython/shared-bindings/countio/Counter.c @@ -0,0 +1,149 @@ + +#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=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); + 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, +}; |