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Date:      Wed, 13 Nov 2019 13:42:13 -0700
From:      Ian Lepore <ian@freebsd.org>
To:        ticso@cicely.de, John-Mark Gurney <jmg@funkthat.com>
Cc:        freebsd-arm@freebsd.org
Subject:   Re: Choose between Raspberry Pi 4B 4GB and ROCKPro64
Message-ID:  <0ad483794f3f1163a852025f4aa331efde82fb7d.camel@freebsd.org>
In-Reply-To: <20191113164800.GS43404@cicely7.cicely.de>
References:  <7b75e2ed23e334878fbb3c1d585ffc51.squirrel@10.1.1.11> <20191015220433.GS96402@funkthat.com> <20191112124539.GM43404@cicely7.cicely.de> <1573571378957-0.post@n6.nabble.com> <20191112221610.GN43404@cicely7.cicely.de> <20191112225251.GB4552@funkthat.com> <20191113075343.GP43404@cicely7.cicely.de> <20191113164800.GS43404@cicely7.cicely.de>

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On Wed, 2019-11-13 at 17:48 +0100, Bernd Walter wrote:
> I just remembered that I own an FTDI FT4232H module.
> This one is capable of 12Mbps with 2k Buffers and high speed USB.
> I have it at a different location - guess I will have to drive and
> pick it up.

You'll certainly have no trouble with the ftdi 4232.  I've tested those
at 6mpbs in both directions concurrently without any data loss.

IMO, breaking free of the 115200 barrier is long overdue, but it would
have been nice if the step up everyone took was to 921600, because
virtually all usb-serial support that.  With line-level rather than
ttl-level adapters, 1mpbs is often the effective speed limit because of
the cheap rs232 line-level chips they use.

-- Ian





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