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e5b47c9306
Fourth view in the USB debugging toolset (usbmon = host URBs, usb-debug = host reasoning, usb-target-debug = device firmware, usb-sniffer = what actually crossed D+/D-). Covers the ataradov/usb-sniffer analyzer: headless pcapng capture (--speed ls/fs/hs, --fold, --limit self-exit), Wireshark/tshark analysis recipes, and the wire realities that bite: downstream broadcast, sniffer self-capture noise, xHCI devnum != wire address, tap-point-dependent reset visibility (hub choreography anchors), FS-behind-HS-hub splits. Every recipe hardware-validated on the rig, including the capture-window floor (a 3 s window provably misses the enumeration ladder; 3M packets minimum). Two udev files with distinct audiences, not one: - examples/device/99-tinyusb-examples.rules (renamed from 99-tinyusb.rules): the user-facing rules the examples need — cafe VID access, hidraw, the ModemManager blacklist, a couple of board probes. getting_started.rst, the webusb_serial README and its source comment point here. - tools/88-tinyusb.rules: the HIL rig's private probe/analyzer allowlist, now with the sniffer (6666:6620 + blank FX2LP 04b4:8613). Installed on the rig only; the usb-sniffer skill references it.
23 lines
1.0 KiB
Plaintext
23 lines
1.0 KiB
Plaintext
# udev rules for running the TinyUSB device examples as a non-root user.
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# Copy this file to the location of your distribution's udev rules, for example on Ubuntu:
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# sudo cp 99-tinyusb-examples.rules /etc/udev/rules.d/
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# Then reload udev configuration by executing:
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# sudo udevadm control --reload-rules
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# sudo udevadm trigger
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# Check SUBSYSTEM
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SUBSYSTEMS=="hidraw", KERNEL=="hidraw*", MODE="0666", GROUP="dialout"
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# Rule applies to all TinyUSB example
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ATTRS{idVendor}=="cafe", MODE="0666", GROUP="dialout"
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# Rule to blacklist TinyUSB example from being manipulated by ModemManager.
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SUBSYSTEMS=="usb", ATTRS{idVendor}=="cafe", ENV{ID_MM_DEVICE_IGNORE}="1"
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# Xplained Pro SamG55 Device
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SUBSYSTEMS=="usb", ATTRS{idVendor}=="03eb", ATTRS{idProduct}=="2111", MODE="0666", GROUP="users", ENV{ID_MM_DEVICE_IGNORE}="1"
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SUBSYSTEMS=="tty", ATTRS{idVendor}=="03eb", ATTRS{idProduct}=="2111", MODE="0666", GROUP="users", ENV{ID_MM_DEVICE_IGNORE}="1"
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# TI Stellaris/Tiva-C Launchpad ICDI
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SUBSYSTEM=="usb", ATTRS{idVendor}=="1cbe", ATTRS{idProduct}=="00fd", MODE="0666"
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