213 lines
8.5 KiB
C
213 lines
8.5 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2020 Jeff Epler for Adafruit Industries
|
|
*
|
|
* 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 "shared-bindings/canio/Message.h"
|
|
|
|
#include "py/obj.h"
|
|
#include "py/objproperty.h"
|
|
#include "py/runtime.h"
|
|
|
|
//| class Message:
|
|
//| def __init__(self, id: int=0, data: Optional[bytes] = None, *, size: Optional[int] = None, rtr: bool = False, extended: bool = False):
|
|
//| """Construct a Message to use with a CAN bus. Provide arguments to create a message to send. Otherwise, use Listener.readinto() to read a message.
|
|
//|
|
|
//| :param int id: The numeric ID of the message
|
|
//| :param bytes data: The content of the message
|
|
//| :param int size: The amount of data requested, for an rtr
|
|
//| :param bool rtr: True if the message represents an rtr (Remote Transmission Request)
|
|
//| :param bool extended: True if the message has an extended identifier, False if it has a standard identifier
|
|
//|
|
|
//| In CAN, messages can have a size from 0 to 8 bytes.
|
|
//|
|
|
//| For a non-rtr message, specify ``data``. For an rtr-message, specify either ``data`` (a dummy buffer of the requested size) or ``size``.
|
|
//| """
|
|
//| ...
|
|
//|
|
|
STATIC mp_obj_t canio_message_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
|
enum { ARG_id, ARG_data, ARG_size, ARG_rtr, ARG_extended, NUM_ARGS };
|
|
static const mp_arg_t allowed_args[] = {
|
|
{ MP_QSTR_id, MP_ARG_INT, {.u_obj = 0} },
|
|
{ MP_QSTR_data, MP_ARG_OBJ, {.u_obj = 0} },
|
|
{ MP_QSTR_size, MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_rtr, MP_ARG_BOOL, {.u_bool = false} },
|
|
{ MP_QSTR_extended, MP_ARG_BOOL, {.u_bool = false} },
|
|
};
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
|
MP_STATIC_ASSERT( MP_ARRAY_SIZE(allowed_args) == NUM_ARGS );
|
|
|
|
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
|
|
|
bool rtr = args[ARG_rtr].u_bool;
|
|
bool extended = args[ARG_extended].u_bool;
|
|
size_t size = (size_t)args[ARG_size].u_int;
|
|
bool specified_size = (size != (size_t)-1);
|
|
bool specified_data = (args[ARG_data].u_obj != NULL);
|
|
|
|
if (specified_size && specified_data) {
|
|
mp_raise_TypeError(translate("specify size or data, but not both"));
|
|
}
|
|
|
|
mp_buffer_info_t data;
|
|
if (specified_data) {
|
|
mp_get_buffer_raise(args[ARG_data].u_obj, &data, MP_BUFFER_READ);
|
|
} else if (specified_size) {
|
|
data.buf = 0;
|
|
data.len = size;
|
|
} else {
|
|
data.buf = 0;
|
|
data.len = 0;
|
|
}
|
|
|
|
if (data.len > 8) {
|
|
mp_raise_ValueError(translate("Messages limited to 8 bytes"));
|
|
}
|
|
|
|
canio_message_obj_t *self = m_new_obj(canio_message_obj_t);
|
|
self->base.type = &canio_message_type;
|
|
common_hal_canio_message_construct(self, args[ARG_id].u_int, data.buf, data.len, rtr, extended);
|
|
return self;
|
|
}
|
|
|
|
//| id: int
|
|
//| """The numeric ID of the message"""
|
|
//|
|
|
STATIC mp_obj_t canio_message_id_get(const mp_obj_t self_in) {
|
|
canio_message_obj_t *self = self_in;
|
|
return MP_OBJ_NEW_SMALL_INT(common_hal_canio_message_get_id(self));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(canio_message_id_get_obj, canio_message_id_get);
|
|
|
|
STATIC mp_obj_t canio_message_id_set(const mp_obj_t self_in, const mp_obj_t id) {
|
|
canio_message_obj_t *self = self_in;
|
|
common_hal_canio_message_set_id(self, mp_obj_get_int(id));
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(canio_message_id_set_obj, canio_message_id_set);
|
|
|
|
STATIC const mp_obj_property_t canio_message_id_obj = {
|
|
.base.type = &mp_type_property,
|
|
.proxy = {(mp_obj_t)&canio_message_id_get_obj,
|
|
(mp_obj_t)&canio_message_id_set_obj,
|
|
(mp_obj_t)&mp_const_none_obj},
|
|
};
|
|
|
|
//| data: bytes
|
|
//| """The content of the message, or dummy content in the case of an rtr.
|
|
//|
|
|
//| Assigning to data also sets the length and clears the rtr flag."""
|
|
//|
|
|
STATIC mp_obj_t canio_message_data_get(const mp_obj_t self_in) {
|
|
canio_message_obj_t *self = self_in;
|
|
return mp_obj_new_bytes((const byte*)common_hal_canio_message_get_data(self), common_hal_canio_message_get_size(self));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(canio_message_data_get_obj, canio_message_data_get);
|
|
|
|
STATIC mp_obj_t canio_message_data_set(const mp_obj_t self_in, const mp_obj_t data_in) {
|
|
canio_message_obj_t *self = self_in;
|
|
mp_buffer_info_t data;
|
|
mp_get_buffer_raise(data_in, &data, MP_BUFFER_READ);
|
|
if (data.len > 8) {
|
|
mp_raise_ValueError(translate("Messages limited to 8 bytes"));
|
|
}
|
|
common_hal_canio_message_set_data(self, data.buf, data.len);
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(canio_message_data_set_obj, canio_message_data_set);
|
|
|
|
|
|
STATIC const mp_obj_property_t canio_message_data_obj = {
|
|
.base.type = &mp_type_property,
|
|
.proxy = {(mp_obj_t)&canio_message_data_get_obj,
|
|
(mp_obj_t)&canio_message_data_set_obj,
|
|
(mp_obj_t)&mp_const_none_obj},
|
|
};
|
|
|
|
|
|
//| extended: bool
|
|
//| """True if the message represents a remote transmission request (RTR)"""
|
|
//|
|
|
STATIC mp_obj_t canio_message_extended_get(const mp_obj_t self_in) {
|
|
canio_message_obj_t *self = self_in;
|
|
return mp_obj_new_bool(common_hal_canio_message_get_extended(self));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(canio_message_extended_get_obj, canio_message_extended_get);
|
|
|
|
STATIC mp_obj_t canio_message_extended_set(const mp_obj_t self_in, const mp_obj_t extended) {
|
|
canio_message_obj_t *self = self_in;
|
|
common_hal_canio_message_set_extended(self, mp_obj_is_true(extended));
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(canio_message_extended_set_obj, canio_message_extended_set);
|
|
|
|
|
|
STATIC const mp_obj_property_t canio_message_extended_obj = {
|
|
.base.type = &mp_type_property,
|
|
.proxy = {(mp_obj_t)&canio_message_extended_get_obj,
|
|
(mp_obj_t)&canio_message_extended_set_obj,
|
|
(mp_obj_t)&mp_const_none_obj},
|
|
};
|
|
|
|
|
|
//| rtr: bool
|
|
//| """True if the message represents a remote transmission request (RTR). Setting rtr to true zeros out data"""
|
|
//|
|
|
STATIC mp_obj_t canio_message_rtr_get(const mp_obj_t self_in) {
|
|
canio_message_obj_t *self = self_in;
|
|
return mp_obj_new_bool(common_hal_canio_message_get_rtr(self));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(canio_message_rtr_get_obj, canio_message_rtr_get);
|
|
|
|
STATIC mp_obj_t canio_message_rtr_set(const mp_obj_t self_in, const mp_obj_t rtr) {
|
|
canio_message_obj_t *self = self_in;
|
|
common_hal_canio_message_set_rtr(self, mp_obj_is_true(rtr));
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(canio_message_rtr_set_obj, canio_message_rtr_set);
|
|
|
|
|
|
STATIC const mp_obj_property_t canio_message_rtr_obj = {
|
|
.base.type = &mp_type_property,
|
|
.proxy = {(mp_obj_t)&canio_message_rtr_get_obj,
|
|
(mp_obj_t)&canio_message_rtr_set_obj,
|
|
(mp_obj_t)&mp_const_none_obj},
|
|
};
|
|
|
|
|
|
STATIC const mp_rom_map_elem_t canio_message_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_id), MP_ROM_PTR(&canio_message_id_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_data), MP_ROM_PTR(&canio_message_data_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_rtr), MP_ROM_PTR(&canio_message_rtr_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_extended), MP_ROM_PTR(&canio_message_extended_obj) },
|
|
};
|
|
STATIC MP_DEFINE_CONST_DICT(canio_message_locals_dict, canio_message_locals_dict_table);
|
|
|
|
const mp_obj_type_t canio_message_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_Message,
|
|
.make_new = canio_message_make_new,
|
|
.locals_dict = (mp_obj_t)&canio_message_locals_dict,
|
|
};
|