Re: usb serial - need quirk?

> On 29 Nov 2021, at 03:39, Daniel Braniss <danny@cs.huji.ac.il> wrote:
> 
> hi,
> this usb device (actually the micro usb on a esp32c3) is reported by FreeBSD 12.1 as:
> ugen0.10: <vendor 0x1a86 USB Single Serial> at usbus0, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (134mA)
> 
> and dimes shows:
> 
> Nov 28 19:02:19 pampa kernel: ugen0.10: <vendor 0x1a86 USB Single Serial> at usbus0
> Nov 28 19:02:19 pampa kernel: umodem0 on uhub3
> Nov 28 19:02:19 pampa kernel: umodem0: <vendor 0x1a86 USB Single Serial, class 2/0, rev 1.10/4.43, addr 16> on usbus0
> Nov 28 19:02:19 pampa kernel: umodem0: data interface 1, has no CM over data, has no break
> 
> it’s the last line that I think is causing failure to flash the device (probably needs the break to set the speed?)

Why would it need break to set the speed?

> any ways, is there some fix for this?

You didn't actually post the problem you are having so it's impossible to say :)

I assume esptool fails but it would be helpful if you posted the output.

I haven't used an ESP32-C3 but all of the other ESP's don't have USB built in so it depends what USB UART you have on your board - any idea which one it it?

--
Daniel O'Connor
"The nice thing about standards is that there
are so many of them to choose from."
 -- Andrew Tanenbaum