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Diffstat (limited to 'shared-bindings/_bleio/CharacteristicBuffer.c')
| -rw-r--r-- | shared-bindings/_bleio/CharacteristicBuffer.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/shared-bindings/_bleio/CharacteristicBuffer.c b/shared-bindings/_bleio/CharacteristicBuffer.c new file mode 100644 index 000000000..9cc708eb7 --- /dev/null +++ b/shared-bindings/_bleio/CharacteristicBuffer.c @@ -0,0 +1,252 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2018 Dan Halbert 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 "py/mperrno.h" +#include "py/ioctl.h" +#include "py/objproperty.h" +#include "py/runtime.h" +#include "py/stream.h" + +#include "shared-bindings/_bleio/CharacteristicBuffer.h" +#include "shared-bindings/_bleio/UUID.h" +#include "shared-bindings/util.h" + +STATIC void raise_error_if_not_connected(bleio_characteristic_buffer_obj_t *self) { + if (!common_hal_bleio_characteristic_buffer_connected(self)) { + mp_raise_ValueError(translate("Not connected")); + } +} + +//| .. currentmodule:: _bleio +//| +//| :class:`CharacteristicBuffer` -- BLE Service incoming values buffer. +//| ===================================================================== +//| +//| Accumulates a Characteristic's incoming values in a FIFO buffer. +//| +//| .. class:: CharacteristicBuffer(characteristic, *, timeout=1, buffer_size=64) +//| +//| Monitor the given Characteristic. Each time a new value is written to the Characteristic +//| add the newly-written bytes to a FIFO buffer. +//| +//| :param Characteristic characteristic: The Characteristic to monitor. +//| It may be a local Characteristic provided by a Peripheral Service, or a remote Characteristic +//| in a remote Service that a Central has connected to. +//| :param int timeout: the timeout in seconds to wait for the first character and between subsequent characters. +//| :param int buffer_size: Size of ring buffer that stores incoming data coming from client. +//| Must be >= 1. +//| +STATIC mp_obj_t bleio_characteristic_buffer_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_characteristic, ARG_timeout, ARG_buffer_size, }; + static const mp_arg_t allowed_args[] = { + { MP_QSTR_characteristic, MP_ARG_REQUIRED | MP_ARG_OBJ }, + { MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(1)} }, + { MP_QSTR_buffer_size, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 64} }, + }; + + mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; + mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); + + const mp_obj_t characteristic = args[ARG_characteristic].u_obj; + + mp_float_t timeout = mp_obj_get_float(args[ARG_timeout].u_obj); + if (timeout < 0.0f) { + mp_raise_ValueError(translate("timeout must be >= 0.0")); + } + + const int buffer_size = args[ARG_buffer_size].u_int; + if (buffer_size < 1) { + mp_raise_ValueError_varg(translate("%q must be >= 1"), MP_QSTR_buffer_size); + } + + if (!MP_OBJ_IS_TYPE(characteristic, &bleio_characteristic_type)) { + mp_raise_ValueError(translate("Expected a Characteristic")); + } + + bleio_characteristic_buffer_obj_t *self = m_new_obj(bleio_characteristic_buffer_obj_t); + self->base.type = &bleio_characteristic_buffer_type; + + common_hal_bleio_characteristic_buffer_construct(self, MP_OBJ_TO_PTR(characteristic), timeout, buffer_size); + + return MP_OBJ_FROM_PTR(self); +} + +STATIC void check_for_deinit(bleio_characteristic_buffer_obj_t *self) { + if (common_hal_bleio_characteristic_buffer_deinited(self)) { + raise_deinited_error(); + } +} + +// These are standard stream methods. Code is in py/stream.c. +// +//| .. method:: read(nbytes=None) +//| +//| Read characters. If ``nbytes`` is specified then read at most that many +//| bytes. Otherwise, read everything that arrives until the connection +//| times out. Providing the number of bytes expected is highly recommended +//| because it will be faster. +//| +//| :return: Data read +//| :rtype: bytes or None +//| +//| .. method:: readinto(buf) +//| +//| Read bytes into the ``buf``. Read at most ``len(buf)`` bytes. +//| +//| :return: number of bytes read and stored into ``buf`` +//| :rtype: int or None (on a non-blocking error) +//| +//| .. method:: readline() +//| +//| Read a line, ending in a newline character. +//| +//| :return: the line read +//| :rtype: int or None +//| + +// These three methods are used by the shared stream methods. +STATIC mp_uint_t bleio_characteristic_buffer_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) { + bleio_characteristic_buffer_obj_t *self = MP_OBJ_TO_PTR(self_in); + check_for_deinit(self); + raise_error_if_not_connected(self); + byte *buf = buf_in; + + // make sure we want at least 1 char + if (size == 0) { + return 0; + } + + return common_hal_bleio_characteristic_buffer_read(self, buf, size, errcode); +} + +STATIC mp_uint_t bleio_characteristic_buffer_write(mp_obj_t self_in, const void *buf_in, mp_uint_t size, int *errcode) { + mp_raise_NotImplementedError(translate("CharacteristicBuffer writing not provided")); + return 0; +} + +STATIC mp_uint_t bleio_characteristic_buffer_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint_t arg, int *errcode) { + bleio_characteristic_buffer_obj_t *self = MP_OBJ_TO_PTR(self_in); + check_for_deinit(self); + raise_error_if_not_connected(self); + if (!common_hal_bleio_characteristic_buffer_connected(self)) { + mp_raise_ValueError(translate("Not connected")); + } + mp_uint_t ret; + if (request == MP_IOCTL_POLL) { + mp_uint_t flags = arg; + ret = 0; + if ((flags & MP_IOCTL_POLL_RD) && common_hal_bleio_characteristic_buffer_rx_characters_available(self) > 0) { + ret |= MP_IOCTL_POLL_RD; + } +// No writing provided. +// if ((flags & MP_IOCTL_POLL_WR) && common_hal_busio_uart_ready_to_tx(self)) { +// ret |= MP_IOCTL_POLL_WR; +// } + } else { + *errcode = MP_EINVAL; + ret = MP_STREAM_ERROR; + } + return ret; +} + +//| .. attribute:: in_waiting +//| +//| The number of bytes in the input buffer, available to be read +//| +STATIC mp_obj_t bleio_characteristic_buffer_obj_get_in_waiting(mp_obj_t self_in) { + bleio_characteristic_buffer_obj_t *self = MP_OBJ_TO_PTR(self_in); + check_for_deinit(self); + return MP_OBJ_NEW_SMALL_INT(common_hal_bleio_characteristic_buffer_rx_characters_available(self)); +} +MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_buffer_get_in_waiting_obj, bleio_characteristic_buffer_obj_get_in_waiting); + +const mp_obj_property_t bleio_characteristic_buffer_in_waiting_obj = { + .base.type = &mp_type_property, + .proxy = {(mp_obj_t)&bleio_characteristic_buffer_get_in_waiting_obj, + (mp_obj_t)&mp_const_none_obj, + (mp_obj_t)&mp_const_none_obj}, +}; + +//| .. method:: reset_input_buffer() +//| +//| Discard any unread characters in the input buffer. +//| +STATIC mp_obj_t bleio_characteristic_buffer_obj_reset_input_buffer(mp_obj_t self_in) { + bleio_characteristic_buffer_obj_t *self = MP_OBJ_TO_PTR(self_in); + check_for_deinit(self); + common_hal_bleio_characteristic_buffer_clear_rx_buffer(self); + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_buffer_reset_input_buffer_obj, bleio_characteristic_buffer_obj_reset_input_buffer); + +//| .. method:: deinit() +//| +//| Disable permanently. +//| +STATIC mp_obj_t bleio_characteristic_buffer_deinit(mp_obj_t self_in) { + bleio_characteristic_buffer_obj_t *self = MP_OBJ_TO_PTR(self_in); + common_hal_bleio_characteristic_buffer_deinit(self); + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_buffer_deinit_obj, bleio_characteristic_buffer_deinit); + +STATIC const mp_rom_map_elem_t bleio_characteristic_buffer_locals_dict_table[] = { + { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&bleio_characteristic_buffer_deinit_obj) }, + + // Standard stream methods. + { MP_OBJ_NEW_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) }, + { MP_OBJ_NEW_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj)}, + { MP_OBJ_NEW_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) }, + // CharacteristicBuffer is currently read-only. + // { MP_OBJ_NEW_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) }, + + { MP_OBJ_NEW_QSTR(MP_QSTR_reset_input_buffer), MP_ROM_PTR(&bleio_characteristic_buffer_reset_input_buffer_obj) }, + // Properties + { MP_ROM_QSTR(MP_QSTR_in_waiting), MP_ROM_PTR(&bleio_characteristic_buffer_in_waiting_obj) }, + +}; + +STATIC MP_DEFINE_CONST_DICT(bleio_characteristic_buffer_locals_dict, bleio_characteristic_buffer_locals_dict_table); + +STATIC const mp_stream_p_t characteristic_buffer_stream_p = { + .read = bleio_characteristic_buffer_read, + .write = bleio_characteristic_buffer_write, + .ioctl = bleio_characteristic_buffer_ioctl, + .is_text = false, + // Match PySerial when possible, such as disallowing optional length argument for .readinto() + .pyserial_compatibility = true, +}; + + +const mp_obj_type_t bleio_characteristic_buffer_type = { + { &mp_type_type }, + .name = MP_QSTR_CharacteristicBuffer, + .make_new = bleio_characteristic_buffer_make_new, + .getiter = mp_identity_getiter, + .iternext = mp_stream_unbuffered_iter, + .protocol = &characteristic_buffer_stream_p, + .locals_dict = (mp_obj_dict_t*)&bleio_characteristic_buffer_locals_dict +}; |