Date: Mon, 29 Nov 2021 09:05:12 +0200 From: Daniel Braniss <danny@cs.huji.ac.il> To: Daniel O'Connor <darius@dons.net.au> Cc: freebsd- <hackers@freebsd.org> Subject: Re: usb serial - need quirk? Message-ID: <D7FBBD72-5655-4F68-A539-7F2012A7D09A@cs.huji.ac.il> In-Reply-To: <20F9C20E-BB89-4FC1-A339-171447368AD2@dons.net.au> References: <11EBCD70-3259-4E4D-8B9C-9F25364BC73C@cs.huji.ac.il> <20F9C20E-BB89-4FC1-A339-171447368AD2@dons.net.au>
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--Apple-Mail=_809D77B7-F639-42C2-988E-9A4197914A37 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On 29 Nov 2021, at 02:36, Daniel O'Connor <darius@dons.net.au> wrote: >=20 >=20 >=20 >> On 29 Nov 2021, at 03:39, Daniel Braniss <danny@cs.huji.ac.il> wrote: >>=20 >> 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=3D0 = md=3DHOST spd=3DFULL (12Mbps) pwr=3DON (134mA) >>=20 >> and dimes shows: >>=20 >> 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 >>=20 >> it=E2=80=99s the last line that I think is causing failure to flash = the device (probably needs the break to set the speed?) >=20 > Why would it need break to set the speed? don=E2=80=99t know, but I=E2=80=99ve seen in the past serial stuff that = needed the break to synchronize. >=20 >> any ways, is there some fix for this? >=20 > 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. the flashing keeps failing with: Chip is ESP32-C3 (revision 3) Features: Wi-Fi Crystal is 40MHz MAC: 7c:df:a1:a3:61:74 Uploading stub... A fatal error occurred: Failed to write to target RAM (result was = 01070000) >=20 > 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? all the other esp32 I have work fine, it=E2=80=99s this esp32c3 that = fails. anyways, i got hold of a ttl to usb from m5stack, and after some = fiddling got it to flash! this chip is CP2104, so the problem seems to be in the driver for the unknown chip on this = esp32c3 - no indication in the diagrams, nor can I read the micro words on the chip = :-( thanks, danny >=20 > -- > Daniel O'Connor > "The nice thing about standards is that there > are so many of them to choose from." > -- Andrew Tanenbaum --Apple-Mail=_809D77B7-F639-42C2-988E-9A4197914A37--
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