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Mon, 13 Jan 2025 22:42:59 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 50DMgx71052926 for usb@FreeBSD.org; Mon, 13 Jan 2025 22:42:59 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 284042] FTDI: UART breaks JTAG Date: Mon, 13 Jan 2025 22:42:59 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: usb X-Bugzilla-Version: Unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: tomek@cedro.info X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: usb@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-usb List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-usb@freebsd.org Sender: owner-freebsd-usb@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D284042 Tomasz "CeDeROM" CEDRO changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |tomek@cedro.info --- Comment #1 from Tomasz "CeDeROM" CEDRO --- * After you connect the dongle are two serial ports showing up (i.e. /dev/c= uaU0 and /dev/cuaU1) or only one (i.e. /dev/cuaU0)? * Are you sure no UART session is active when you start JTAG? * Have you tried playing with stty [1]? I think the defaults now are hardwa= re flow control enabled for uarts, what happens if you disable control lines w= ith stty? * Maybe you can configure / tune the interface on attach with devd [2]? * Are you sure there are no buffers / signals on the interface board that c= ould introduce interference between interfaces A and B of the MPSSE/FTDI? * Have you tried resetting that interface before a JTAG session? [1] https://man.freebsd.org/cgi/man.cgi?query=3Dstty [2] https://man.freebsd.org/cgi/man.cgi?query=3Ddevd --=20 You are receiving this mail because: You are the assignee for the bug.=