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?
Yuri
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