Date: Thu, 12 Jul 2018 08:28:56 -0700 From: bob prohaska <fbsd@www.zefox.net> To: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: RPI3B+ does not reboot Message-ID: <20180712152856.GA882@www.zefox.net> In-Reply-To: <op.zl1enivhkndu52@klop.ws> References: <BY2PR16MB0149B3B639A5664E8CAF1870BD430@BY2PR16MB0149.namprd16.prod.outlook.com> <op.zl1enivhkndu52@klop.ws>
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On Thu, Jul 12, 2018 at 01:39:08PM +0200, Ronald Klop wrote: > On Mon, 02 Jul 2018 16:58:30 +0200, Wis Macomson <Wis@teraspeed.com> wrote: > > > Can you disconnect the serial TX data (data to the RPi) and try the > > reboots? > > > > It may be that this signal is partially powering the processor through > > the input ESD protection diode, leading to very awkward internal states. > > This has been observed on the Rock64 (RK3328 SoC) and Rockpro64 (RK3399). > > > > If you can just break the TX connection, you'll be able to see the boot > > messages. > > > > -wis > > > Hi, > > I will try this. Is this also relevant if my serial connection of the RPI3 > is not connected to my laptop (via USB). > Because the reboot also fails than. > > Regards, > > Ronald. I'm still seeing cpu_reset failed on a Pi3 (not +) at r336188. TX and RX only are connected, GND is lifted. The Pi's board ground is connected via USB to the other four hosts in the ring. The USB-serial adapter is FTDI and has shown absolutely no tendency to lock up or malfunction. Thanks for reading, bob prohaska
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