Re: usb serial - need quirk?
- In reply to: Daniel O'Connor via hackers : "Re: usb serial - need quirk?"
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Date: Mon, 29 Nov 2021 08:42:54 UTC
> On 29 Nov 2021, at 10:16, Daniel O'Connor <firstname.lastname@example.org> wrote: > > > >> On 29 Nov 2021, at 18:09, Daniel Braniss <email@example.com> wrote: >> >>> On 29 Nov 2021, at 09:24, Daniel O'Connor <firstname.lastname@example.org> wrote: >>> >>> I had a look at the ESP32-C3 datasheet and it *does* have a USB interface built in and it talks about a CDC-ACM virtual serial port which matches what you see. >>> >>> The only ACM quirk I can see is UQ_ASSUME_CM_OVER_DATA so you could try that I suppose.. >> >> >>> (See the usb_quirk man page) >>> >> i’ll try this ASAP, thanks >> >> BTW, looking at the m5 stamp c3 diagram, I can’t see how the usb-typec is connected to the esp32c3 >> from the esp32c3 docs, it’s gpio9 that needs to be grounded to flash, and I don’t see that happening when >> using the onboard usb. >> oh well, > > The schematic at https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/static/assets/img/product_pics/core/stamp_c3/stamp_c3_sch_01.webp it has a CH9102F and some googling suggests it presents as a CDC ACM device. > > It looks like it has RTS and DTR hooked up so they can reset and drive GPIO9 for programming. > > Unfortunately I can't see anything obvious about why it doesn't work :( well, I tried adding the quirk but no change, so using a different ttl2usb works - though needs manual intervention to ground pin 9 - im ok, I need to flash via serial only once, since after that I can use OTA (unless I screwup and it panics :-) BTW: who ever is interested in the esp-idf the master version now installs and works almost out of the box on FreeBSD 13.0 thanks, danny > > -- > Daniel O'Connor > "The nice thing about standards is that there > are so many of them to choose from." > -- Andrew Tanenbaum >