119 lines
4.9 KiB
C
119 lines
4.9 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Dan Halbertfor Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "shared-bindings/usb_cdc/__init__.h"
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#include "shared-bindings/usb_cdc/Serial.h"
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#include "py/runtime.h"
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//| """USB CDC Serial streams
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//|
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//| The `usb_cdc` module allows access to USB CDC (serial) communications.
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//|
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//| On Windows, each `Serial` is visible as a separate COM port. The ports will often
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//| be assigned consecutively, REPL first, but this is not always true.
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//|
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//| On Linux, the ports are typically ``/dev/ttyACM0`` and ``/dev/ttyACM1``. The REPL
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//| is usually first.
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//|
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//| On MacOS, the ports are typically ``/dev/cu.usbmodem<something>``. The something
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//| varies based on the USB bus and port used. The REPL is usually first.
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//| """
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//|
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//| repl: Optional[Serial]
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//| """The `Serial` object that can be used to communicate over the REPL serial
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//| channel. ``None`` if disabled.
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//|
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//| Note that`sys.stdin` and `sys.stdout` are also connected to the REPL, though
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//| they are text-based streams, and the `repl` object is a binary stream."""
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//|
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//| data: Optional[Serial]
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//| """A `Serial` object that can be used to send and receive binary data to and from
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//| the host.
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//| Note that `data` is *disabled* by default."""
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//| def configure_usb(*, repl_enabled: bool = True, data_enabled: bool = False) -> None:
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//| """Configure the USB CDC devices. Can be called in ``boot.py``, before USB is connected.
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//|
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//| :param repl_enabled bool: Enable or disable the `repl` USB serial device.
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//| True to enable; False to disable. Enabled by default.
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//| :param data_enabled bool: Enable or disable the `data` USB serial device.
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//| True to enable; False to disable. *Disabled* by default."""
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//| ...
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//|
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STATIC mp_obj_t usb_cdc_configure_usb(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_repl_enabled, ARG_data_enabled };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_repl_enabled, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = true } },
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{ MP_QSTR_data_enabled, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false } },
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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(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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if (!common_hal_usb_cdc_configure_usb(args[ARG_repl_enabled].u_bool, args[ARG_data_enabled].u_bool)) {
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mp_raise_RuntimeError(translate("Cannot change USB devices now"));
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}
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(usb_cdc_configure_usb_obj, 0, usb_cdc_configure_usb);
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// The usb_cdc module dict is mutable so that .repl and .data may
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// be set to a Serial or to None depending on whether they are enabled or not.
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static mp_map_elem_t usb_cdc_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_usb_cdc) },
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{ MP_ROM_QSTR(MP_QSTR_Serial), MP_OBJ_FROM_PTR(&usb_cdc_serial_type) },
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{ MP_ROM_QSTR(MP_QSTR_repl), mp_const_none },
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{ MP_ROM_QSTR(MP_QSTR_data), mp_const_none },
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{ MP_ROM_QSTR(MP_QSTR_configure_usb), MP_OBJ_FROM_PTR(&usb_cdc_configure_usb_obj) },
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};
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static MP_DEFINE_MUTABLE_DICT(usb_cdc_module_globals, usb_cdc_module_globals_table);
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const mp_obj_module_t usb_cdc_module = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&usb_cdc_module_globals,
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};
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static void set_module_dict_entry(mp_obj_t key_qstr, mp_obj_t serial_obj) {
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mp_map_elem_t *elem = mp_map_lookup(&usb_cdc_module_globals.map, key_qstr, MP_MAP_LOOKUP);
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if (elem) {
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elem->value = serial_obj;
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}
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}
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void usb_cdc_set_repl(mp_obj_t serial_obj) {
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set_module_dict_entry(MP_ROM_QSTR(MP_QSTR_repl), serial_obj);
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}
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void usb_cdc_set_data(mp_obj_t serial_obj) {
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set_module_dict_entry(MP_ROM_QSTR(MP_QSTR_data), serial_obj);
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}
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