RefuhrandClaude Opus 5
3ae429ae48
candleLight, CANable, CANnectivity and cantact adapters speak gs_usb. On Linux and macOS the kernel driver exposes them as SocketCAN interfaces, so SavvyCAN already reached them through Qt SerialBus. Windows has no such driver, which left those adapters unusable there. Add a GSUSBConnection that talks to the hardware directly over WinUSB: - one connection per physical device, one SavvyCAN bus per CAN channel - CAN FD including BRS, plus RTR, extended IDs and error frames - known good bit timings for 16/48/80/160/170 MHz device clocks, with a generic solver for clocks the tables do not cover - hardware timestamps, unwrapped across the 32 bit rollover and anchored to the host clock so they line up with the rest of SavvyCAN gs_usb multiplexes every channel over a single USB bulk IN endpoint, so a single reader thread drains it and hands frames to the connection thread in batches, coalescing the wakeups. That keeps one producer on the lock free queue, which the tx echo path already writes to. Device scans skip adapters that a live connection holds. candle_dev_open() shares the file handle and queues read URBs immediately, so probing a device in use would consume frames the open connection is waiting for. connections/candle_api is an unmodified copy of the candle Windows API, LGPL 3.0 rather than MIT and only compiled into Windows builds. See its README for provenance. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XZnuZJ7zc3e8hk6C8bGDZN
38 lines
1.4 KiB
C
38 lines
1.4 KiB
C
/*
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Copyright (c) 2016 Hubert Denkmair <hubert@denkmair.de>
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This file is part of the candle windows API.
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This library is free software: you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation, either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#define USB_DIR_OUT 0 /* to device */
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#define USB_DIR_IN 0x80 /* to host */
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#define USB_TYPE_MASK (0x03 << 5)
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#define USB_TYPE_STANDARD (0x00 << 5)
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#define USB_TYPE_CLASS (0x01 << 5)
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#define USB_TYPE_VENDOR (0x02 << 5)
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#define USB_TYPE_RESERVED (0x03 << 5)
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#define USB_RECIP_MASK 0x1f
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#define USB_RECIP_DEVICE 0x00
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#define USB_RECIP_INTERFACE 0x01
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#define USB_RECIP_ENDPOINT 0x02
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#define USB_RECIP_OTHER 0x03
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