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| 1 | +/* |
| 2 | + * Shared USB for the Raspberry Pi Pico RP2040 |
| 3 | + * Allows for multiple endpoints to share the USB controller |
| 4 | + * |
| 5 | + * Copyright (c) 2021 Earle F. Philhower, III <earlephilhower@yahoo.com> |
| 6 | + * |
| 7 | + * This library is free software; you can redistribute it and/or |
| 8 | + * modify it under the terms of the GNU Lesser General Public |
| 9 | + * License as published by the Free Software Foundation; either |
| 10 | + * version 2.1 of the License, or (at your option) any later version. |
| 11 | + * |
| 12 | + * This library is distributed in the hope that it will be useful, |
| 13 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | + * Lesser General Public License for more details. |
| 16 | + * |
| 17 | + * You should have received a copy of the GNU Lesser General Public |
| 18 | + * License along with this library; if not, write to the Free Software |
| 19 | + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | + */ |
| 21 | + |
| 22 | +#include "pico/mutex.h" |
| 23 | + |
| 24 | +// Weak function definitions for each type of endpoint |
| 25 | +extern void __USBInstallSerial() __attribute__((weak)); |
| 26 | +extern void __USBInstallKeyboard() __attribute__((weak)); |
| 27 | +extern void __USBInstallMouse() __attribute__((weak)); |
| 28 | +extern void __USBInstallMIDI() __attribute__((weak)); |
| 29 | + |
| 30 | +// Big, global USB mutex, shared with all USB devices to make sure we don't |
| 31 | +// have multiple cores updating the TUSB state in parallel |
| 32 | +extern mutex_t __usb_mutex; |
| 33 | + |
| 34 | +// HID report ID inquiry (report ID will vary depending on the number/type of other HID) |
| 35 | +int __USBGetKeyboardReportID(); |
| 36 | +int __USBGetMouseReportID(); |
| 37 | + |
| 38 | +// Called by main() to init the USB HW/SW. |
| 39 | +void __USBStart(); |
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