Date: Wed, 20 Nov 2019 08:32:02 +0100 From: Hans Petter Selasky <hps@selasky.org> To: Yuri <yuri@rawbw.com>, freebsd-usb@FreeBSD.org Subject: Re: Why do USB timeouts happen: getting device descriptor at addr 5 failed, USB_ERR_TIMEOUT ? Message-ID: <de8a3469-4d48-8391-71cf-8ea082eab66f@selasky.org> In-Reply-To: <517c2cf9-c695-5641-f908-b04bd02fbcf0@rawbw.com> References: <517c2cf9-c695-5641-f908-b04bd02fbcf0@rawbw.com>
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On 2019-11-20 05:23, Yuri wrote: > I have a USB Hantek PC-oscilloscope. > > Several seconds after the PulseView program begins to upload firmware > into it, the device disconnects: > > ugen8.5: <vendor 0x04b4 product 0x6022> at usbus8 > ugen8.5: <vendor 0x04b4 product 0x6022> at usbus8 (disconnected) > usbd_setup_device_desc: getting device descriptor at addr 5 failed, > USB_ERR_TIMEOUT > usbd_setup_device_desc: getting device descriptor at addr 5 failed, > USB_ERR_TIMEOUT > usbd_setup_device_desc: getting device descriptor at addr 5 failed, > USB_ERR_TIMEOUT > usbd_setup_device_desc: getting device descriptor at addr 5 failed, > USB_ERR_TIMEOUT > usbd_setup_device_desc: getting device descriptor at addr 5 failed, > USB_ERR_TIMEOUT > ugen8.5: <Unknown > at usbus8 (disconnected) > > > I don't believe that the device is broken, it is brand new. > > Why would the device access, no mater what it is, cause the timeout and > disconnect? > Hi, Some devices need to re-enumerate themself after the firmware is uploaded. Maybe that process fails. What is your USB host controller? Did you try connecting through an external USB HUB. Does the firmware uploader try to reset the USB device? --HPS
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