Date: Thu, 17 Feb 2022 20:00:33 +1030 From: "Daniel O'Connor" <darius@dons.net.au> To: Daniel Braniss <danny@cs.huji.ac.il> Cc: freebsd- <hackers@freebsd.org>, "usb@freebsd.org" <usb@FreeBSD.org> Subject: Re: usb CH9102 serial chip Message-ID: <013FB4BA-7D32-4FFB-AFD3-E594CF638A66@dons.net.au> In-Reply-To: <C07DE6BE-65AB-43FA-8C52-2A7D0197767E@cs.huji.ac.il> References: <C8258774-B183-48DD-905F-260F5999152C@cs.huji.ac.il> <7DD6E1FA-3EA4-44D9-A272-9E51FB9F2BFC@dons.net.au> <C07DE6BE-65AB-43FA-8C52-2A7D0197767E@cs.huji.ac.il>
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> On 17 Feb 2022, at 19:50, Daniel Braniss <danny@cs.huji.ac.il> wrote: > >> If that is the case then the chip/driver are working fine since that requires bidirectional communication etc.. >> > > but that works only if I power up the board while pressing a button, then it also appears as /dev/ttyU0, and > so then I can flash, after reset, the device is gone and there are errors ( BTW, the flashed image workes): > > Feb 17 09:46:59 pampero kernel: usbd_setup_device_desc: getting device descriptor at addr 4 failed, USB_ERR_IOERROR > Feb 17 09:47:00 pampero kernel: usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_IOERROR, ignored) What sort of dev board is it? Seems very strange the USB UART would behave differently unless it's wired up in an unusual way IMO. -- Daniel O'Connor "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaumhelp
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