Date: Wed, 13 Nov 2019 08:53:43 +0100 From: Bernd Walter <ticso@cicely7.cicely.de> To: John-Mark Gurney <jmg@funkthat.com> Cc: ticso@cicely.de, freebsd-arm@freebsd.org Subject: Re: Choose between Raspberry Pi 4B 4GB and ROCKPro64 Message-ID: <20191113075343.GP43404@cicely7.cicely.de> In-Reply-To: <20191112225251.GB4552@funkthat.com> 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>
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On Tue, Nov 12, 2019 at 02:52:51PM -0800, John-Mark Gurney wrote: > Bernd Walter wrote this message on Tue, Nov 12, 2019 at 23:16 +0100: > > On Tue, Nov 12, 2019 at 08:09:38AM -0700, Klaus Küchemann via freebsd-arm wrote: > > > <<The u-boot has to go into the SPI-Flash or on the card? >> > > > > > > onto the uSD : > > > https://www.freshports.org/sysutils/u-boot-rockpro64/ > > > Regards > > > Klaus > > > > Thank you. > > > > Do you know the bps rate used by u-boot and later components? > > I do see some output at the usual 115200 bps, but it is messed up. > > Also tried other typical bps rates, including 1.5Mbps as mentioned > > on the RockPro Wiki, but none worked. > > I wouldn't rule out that it is the USB uart failing at 1.5M though, > > but I've tried a PL2303, CP2102 (which refused 1.5Mbps) and > > a CH340. > > Unfortunately I don't have an FTDI based TTL one at hands. > > It also fails with reading the uartt output when booting an Armbian > > image, which as such is booting fine according to the HDMI output. > > It's 1.5Mbps, aka 1500000. I'm using the CH340G that they sell: > https://store.pine64.org/?product=padi-serial-console > > And it works, but it will occasionally drop characters. Sigh - IMO 1.5M is an insane idea for that and so needless. > None of my other serial adapters could do the speed necessary. I just retried with the CH340 - again no success, but noticed that the chip on my adapter is unlabeled. So probably it isn't a genuine. I should have some others, but not at home, and I also have some loose CH340G chips. -- B.Walter <bernd@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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