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9d0d262be0
This new machine-module driver provides a "USBDevice" singleton object and a shim TinyUSB "runtime" driver that delegates the descriptors and all of the TinyUSB callbacks to Python functions. This allows writing arbitrary USB devices in pure Python. It's also possible to have a base built-in USB device implemented in C (eg CDC, or CDC+MSC) and a Python USB device added on top of that. This work was funded through GitHub Sponsors. Signed-off-by: Angus Gratton <angus@redyak.com.au>
76 lines
2.5 KiB
C
76 lines
2.5 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 Blake W. Felt & Angus Gratton
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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/mpconfig.h"
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#if MICROPY_HW_ENABLE_USBDEV
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#include "mp_usbd.h"
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#ifndef NO_QSTR
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#include "device/dcd.h"
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#endif
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#if !MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE
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void mp_usbd_task(void) {
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tud_task_ext(0, false);
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}
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void mp_usbd_task_callback(mp_sched_node_t *node) {
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(void)node;
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mp_usbd_task();
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}
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#endif // !MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE
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extern void __real_dcd_event_handler(dcd_event_t const *event, bool in_isr);
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// If -Wl,--wrap=dcd_event_handler is passed to the linker, then this wrapper
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// will be called and allows MicroPython to schedule the TinyUSB task when
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// dcd_event_handler() is called from an ISR.
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TU_ATTR_FAST_FUNC void __wrap_dcd_event_handler(dcd_event_t const *event, bool in_isr) {
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__real_dcd_event_handler(event, in_isr);
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mp_usbd_schedule_task();
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}
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TU_ATTR_FAST_FUNC void mp_usbd_schedule_task(void) {
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static mp_sched_node_t usbd_task_node;
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mp_sched_schedule_node(&usbd_task_node, mp_usbd_task_callback);
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}
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void mp_usbd_hex_str(char *out_str, const uint8_t *bytes, size_t bytes_len) {
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size_t hex_len = bytes_len * 2;
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for (int i = 0; i < hex_len; i += 2) {
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static const char *hexdig = "0123456789abcdef";
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out_str[i] = hexdig[bytes[i / 2] >> 4];
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out_str[i + 1] = hexdig[bytes[i / 2] & 0x0f];
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}
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out_str[hex_len] = 0;
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}
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#endif // MICROPY_HW_ENABLE_USBDEV
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