Date: Sat, 6 Jan 2018 15:55:34 -0800 From: Mark Millard <markmi@dsl-only.net> To: Emmanuel Vadot <manu@bidouilliste.com>, Mark Linimon <linimon@lonesome.com> Cc: Freebsd-arm <freebsd-arm@freebsd.org>, Ian Lepore <ian@FreeBSD.org> Subject: Re: I now have access to a Rock64-4GB (Rock64_V2.0 board); I hope to put FreeBSD on it someday Message-ID: <0BD8991D-8425-44CD-88AF-E0BF9C10213C@dsl-only.net> In-Reply-To: <9FDFF16A-02D4-4EC3-BB66-AF9C0FA3B2EE@dsl-only.net> References: <F8BF35D8-7DEB-4803-A53D-E40E20E2C921@dsl-only.net> <20180105133154.GC31064@lonesome.com> <34E00728-3FC0-4B56-A420-5171FD224008@dsl-only.net> <20180105144541.GA32430@lonesome.com> <6168e37ebf0210ddc49947030db83e9f@megadrive.org> <41bcf0afe2a94d80909837b43d25022c@megadrive.org> <9FDFF16A-02D4-4EC3-BB66-AF9C0FA3B2EE@dsl-only.net>
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[Based on Ian's observation report, I decided to try the FT232R: It seems to be working great. Thanks Ian.] On 2018-Jan-6, at 1:23 PM, Mark Millard <markmi at dsl-only.net> wrote: > On 2018-Jan-6, at 8:45 AM, Emmanuel Vadot <manu at bidouilliste.com> = wrote: >=20 >> On 2018-01-06 17:43, Emmanuel Vadot wrote: >>> On 2018-01-05 15:45, Mark Linimon wrote: >>>> On Fri, Jan 05, 2018 at 06:27:41AM -0800, Mark Millard wrote: >>>>> the early boot baudrate for the console is apparently 1.5Mbit/s >>>> I've had to use minicom. That's the only thing that I'm sure = supports it. >>>> mcl >>> Works fine with tip(1) here using an FDTI usb<->serial, using a >>> PL2303XA doesn't work (but should based on the datasheet), and my >>> CP2108 should work but I haven't tested yet. >>=20 >> Also my PL2303XA adapter works on linux using minicom but only for = RX, that might be a driver issue. >=20 > I've been using Serial on an old MacOS X laptop. > I've done more experiments. Here is what I've > observed. . . >=20 > For a CH340G, Serial did not allow 1500000 > (built-in driver for USB ID 1a86:7523:0254) > but Serial is being updated to allow it. (I > have a preliminary release now, so I have > 1500000 support now.) >=20 > However, there was extensive dropped text from > sustained output in my limited testing of this > combination. >=20 > [The CH340G is from the type of serial console > for the ROCK64 that is sold at pine64.org .] >=20 > I got access to a CP2102 and tried it with Serial > (again a built-in driver, but for USB ID > 10c4:ea60:0100). There is far less dropped text, > although it does happen on occasion for sustained > serial output. >=20 > I've not tried a FT232R with Serial (AppleUSBFTDI > driver for USB ID 0403:6001:0600) but could have > access to do so. I've gotten access to a FT232R for use with Serial against the ROCK64. It seems a highly reliable combination. For example, I've yet to see a 70-line top display that was corrupted. [Of course this also introduced Apple's driver, instead of a built-in one for Serial.] > I've not tried a LP2303X/HX/TA with Serial > (built-in driver for USB ID 067b:2303:0300) but > could have access to do so. >=20 > (The device identifications are as reported by > Serial, both USB ID and "Chip" name.) >=20 >=20 >=20 > As stands for ubuntu 16.04's top on the ROCK64, > running via a 70 line window in Serial, I've > yet to see a screen update that looked completely > good. >=20 > But most lines for the CP2102 and Serial > combination look good for each update so far. >=20 > By contrast, the CH340G with Serial had text > all over the place with few lines ever looking > good. The bad lines were hard to interpret. =3D=3D=3D Mark Millard markmi at dsl-only.net
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