910fcf1c93
This is confined to pure ASCII, but does support Alt Gr. This is enough
to make a French keyboard layout work:
* home row is "qsdfghjklm"
* numerals are all shifted
* keys like {} require Alt Gr
While not tested, this should also support layouts like Colemak with
the necssary keymap file.
Layouts can be produced from Neradoc's keyboard layout modules on the
device & loaded at runtime. Code to do so is at
https://gist.github.com/jepler/597c0a00e0eb014a433e03c0ae363a08
as well as a sketch of how an extended format could support dead keys &
the full Unicode BMP instead of just ASCII.
85 lines
3.4 KiB
C
85 lines
3.4 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) 2022 Scott Shawcroft for 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 "py/obj.h"
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#include "py/mphal.h"
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#include "py/runtime.h"
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#include "shared-bindings/usb/__init__.h"
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#include "shared-bindings/usb/core/__init__.h"
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#include "supervisor/usb.h"
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//| """PyUSB-compatible USB host API
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//|
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//| The `usb` is a subset of PyUSB that allows you to communicate to USB devices.
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//| """
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//|
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//| def set_user_keymap(keymap: ReadableBuffer, /) -> None:
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//| """Set the keymap used by a USB HID keyboard in kernel mode
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//|
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//| The keymap consists of 256 or 384 1-byte entries that map from USB keycodes
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//| to ASCII codes. The first 128 entries are for unmodified keys,
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//| the next 128 entries are for shifted keys,and the next optional 128 entries are
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//| for altgr-modified keys.
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//|
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//| The values must all be ASCII (32 through 126 inclusive); other values are not valid.
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//|
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//| The values at index 0, 128, and 256 (if the keymap has 384 entries) must be
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//| 0; other values are reserved for future expansion to indicate alternate
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//| keymap formats.
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//|
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//| At other indices, the value 0 is used to indicate that the normal
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//| definition is still used. For instance, the entry for HID_KEY_ARROW_UP
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//| (0x52) is usually 0 so that the default behavior of sending an escape code
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//| is preserved.
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//|
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//| This function is a CircuitPython extension not present in PyUSB
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//| """
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//|
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STATIC mp_obj_t usb_set_user_keymap(mp_obj_t buf_in) {
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(buf_in, &bufinfo, MP_BUFFER_READ);
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usb_keymap_set(bufinfo.buf, bufinfo.len);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(usb_set_user_keymap_obj, usb_set_user_keymap);
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STATIC mp_rom_map_elem_t usb_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_usb) },
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{ MP_ROM_QSTR(MP_QSTR_core), MP_OBJ_FROM_PTR(&usb_core_module) },
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{ MP_ROM_QSTR(MP_QSTR_set_user_keymap), MP_OBJ_FROM_PTR(&usb_set_user_keymap_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(usb_module_globals, usb_module_globals_table);
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const mp_obj_module_t usb_module = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&usb_module_globals,
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};
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MP_REGISTER_MODULE(MP_QSTR_usb, usb_module, CIRCUITPY_USB_HOST);
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