Date: Sat, 19 Sep 2020 16:04:37 -0600 From: Ian Lepore <ian@freebsd.org> To: tech-lists <tech-lists@zyxst.net>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: onboard wireless on rpi4 Message-ID: <c19ff3a9eb78f710204fa416365617553f5aec06.camel@freebsd.org> In-Reply-To: <20200919184637.GA27098@bastion.zyxst.net> References: <20200904134619.GB80905@bastion.zyxst.net> <69934262-D9D3-4986-849D-9E8221D1E387@kronometrix.org> <1677459627.55.1599232125847@localhost> <75E08DC2-D229-45AA-85AE-CCF06FD0B490@kronometrix.org> <AAA3DC42-5C3E-4A1D-BE75-A20DE3BC300F@googlemail.com> <09959D86-E3E3-43E9-8134-C2FC73343DBA@lists.zabbadoz.net> <20200905181220.GG80905@bastion.zyxst.net> <20200905234313.GH80905@bastion.zyxst.net> <EYvxKAScgQW0Nxfdxz4KPXZ-3OBfwdEsT2RIZSQqudyfb1n0Tr0kwHGlNER6mbloRqTK9vIaeAa0bIqUc_bU75Gab8uOuWgMBvQMzR810uw=@protonmail.com> <20200919184637.GA27098@bastion.zyxst.net>
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On Sat, 2020-09-19 at 19:46 +0100, tech-lists wrote: > On Sat, Sep 19, 2020 at 04:22:34PM +0000, Robert Crowston wrote: > > > Do you have a serial cable to get the console output? It would be handy > > to have the boot output. > > alas, not a suitable one. Seems I need a serial (or usb masquerading as > serial) to tty cable for serial console output, from three GPIO pins on > the pi. > > I hoped it was possible to get the output to ethernet port on the rpi but > I don't know how. Think I need tty to serial/usb cable, unless you > know of a different method? Somehow make the ethernet port output console > output? The one I already have is an FTDI usb <> rj45 console cable suitable > for eg cisco equipment. > > anyway, should be getting said (usb/serial<>tty) cable in a few days though, > hopefully. > Your cisco cable is a standard usb-serial adapter the same as any other, it just has an rj45 plug because cisco made a rather insane decision many years ago to use that type of jack for a serial console connection. But, the cisco cable is rs-232 (inverted high voltage signaling), whereas the console pins on the rpi are uart-level (3.3v non-inverted). -- Ian
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