Re: uchcom USB-serial
On Tue, Oct 16, 2018 at 05:44:30PM +0200, Manuel Bouyer wrote: > On Tue, Oct 16, 2018 at 04:36:35PM +0100, Patrick Welche wrote: > > Just had a proper go, and see: > > > > uchcom0: QinHeng Electronics (0x1a86) USB2.0-Ser! (0x7523), rev 1.10/2.54, > > addr 3 > > uchcom0: CH341 detected > > ucom3 at uchcom0 > > uchcom0: cannot reset: STALLED > > uchcom0: cannot reset: STALLED > > uchcom0: cannot reset: STALLED > > uchcom0: cannot reset: STALLED > > uchcom0: cannot reset: STALLED > > uchcom0: cannot reset: STALLED > > uchcom0: cannot reset: STALLED > > ... > > > > I note that you have the full word "Serial"... > > Looks like a communication problem. Mine is manufactured by olimex, > which usually do robust hardware. I can see there is a true 12Mhz crystal. > Maybe yours uses a ceramic resonator, which is not stable enough ? This says "NLink Pax" on it. I think it is returning to where it came from... Thanks, Patrick
Re: uchcom USB-serial
On Tue, Oct 16, 2018 at 04:36:35PM +0100, Patrick Welche wrote: > Just had a proper go, and see: > > uchcom0: QinHeng Electronics (0x1a86) USB2.0-Ser! (0x7523), rev 1.10/2.54, > addr 3 > uchcom0: CH341 detected > ucom3 at uchcom0 > uchcom0: cannot reset: STALLED > uchcom0: cannot reset: STALLED > uchcom0: cannot reset: STALLED > uchcom0: cannot reset: STALLED > uchcom0: cannot reset: STALLED > uchcom0: cannot reset: STALLED > uchcom0: cannot reset: STALLED > ... > > I note that you have the full word "Serial"... Looks like a communication problem. Mine is manufactured by olimex, which usually do robust hardware. I can see there is a true 12Mhz crystal. Maybe yours uses a ceramic resonator, which is not stable enough ? -- Manuel Bouyer NetBSD: 26 ans d'experience feront toujours la difference --
Re: uchcom USB-serial
On Sat, Oct 13, 2018 at 12:39:35PM +0200, Manuel Bouyer wrote: > On Tue, Oct 09, 2018 at 04:13:32PM +0100, Patrick Welche wrote: > > I purchased a couple of USB-serial adapters. Unfortunately, given the lack > > of detail in the descriptions, they turned out to be > > > > uchcom0: QinHeng Electronics (0x1a86) USB2.0-Ser! (0x7523), rev 1.10/2.54 > > > > According to > > > > https://nxr.netbsd.org/xref/src/sys/dev/usb/uchcom.c#40 > > > > this is "the worst USB-serial chip in the world." > > > > Do these work at all? (Get "tip: link down", then change to a > > uplcom0: Prolific Technology Inc. and all is well.) > > I use one: > uchcom0: QinHeng Electronics (0x1a86) USB2.0-Serial (0x7523), rev 1.10/2.54, > addr 3 > uchcom0: CH341 detected > ucom0 at uchcom0 > > to connect to an ARM board's console. I didn't notice problems so far ... Just had a proper go, and see: uchcom0: QinHeng Electronics (0x1a86) USB2.0-Ser! (0x7523), rev 1.10/2.54, addr 3 uchcom0: CH341 detected ucom3 at uchcom0 uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED ... I note that you have the full word "Serial"... Cheers, Patrick
Re: uchcom USB-serial
On Tue, Oct 09, 2018 at 04:13:32PM +0100, Patrick Welche wrote: > I purchased a couple of USB-serial adapters. Unfortunately, given the lack > of detail in the descriptions, they turned out to be > > uchcom0: QinHeng Electronics (0x1a86) USB2.0-Ser! (0x7523), rev 1.10/2.54 > > According to > > https://nxr.netbsd.org/xref/src/sys/dev/usb/uchcom.c#40 > > this is "the worst USB-serial chip in the world." > > Do these work at all? (Get "tip: link down", then change to a > uplcom0: Prolific Technology Inc. and all is well.) I use one: uchcom0: QinHeng Electronics (0x1a86) USB2.0-Serial (0x7523), rev 1.10/2.54, addr 3 uchcom0: CH341 detected ucom0 at uchcom0 to connect to an ARM board's console. I didn't notice problems so far ... -- Manuel Bouyer NetBSD: 26 ans d'experience feront toujours la difference --
uchcom USB-serial
I purchased a couple of USB-serial adapters. Unfortunately, given the lack of detail in the descriptions, they turned out to be uchcom0: QinHeng Electronics (0x1a86) USB2.0-Ser! (0x7523), rev 1.10/2.54 According to https://nxr.netbsd.org/xref/src/sys/dev/usb/uchcom.c#40 this is "the worst USB-serial chip in the world." Do these work at all? (Get "tip: link down", then change to a uplcom0: Prolific Technology Inc. and all is well.) Cheers, Patrick
