Date: Sun, 28 Apr 2013 10:37:03 +0100 From: Iain Young <iain@g7iii.net> To: freebsd-arm@freebsd.org Subject: Re: BeagleBone Black Message-ID: <517CEDBF.3090102@g7iii.net> In-Reply-To: <77E91A57-7880-4908-8999-6115333F5002@kientzle.com> References: <CANuCnH9XP3Jn30EWCuZ0AmQF6MA4q4U9GUB7LU=XXZEdp7ZJ8g@mail.gmail.com> <D74DF146-7E72-4A2A-B74B-A20758010166@kientzle.com> <26A08C89-95EA-463D-98C5-A471F8D15C90@freebsd.org> <BCB14F16-203D-4C9A-8318-4E7DF1F88E17@kientzle.com> <54A0884D-31D0-4FC6-BBB5-58E3D11050E6@freebsd.org> <F01F0BC9-8464-469C-B1FE-D0E6AC217164@freebsd.org> <77E91A57-7880-4908-8999-6115333F5002@kientzle.com>
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On 28/04/13 08:13, Tim Kientzle wrote: > The 4-pin adapter I got from Adafruit for use with Raspberry Pi seems > to work just fine, though the CircuitCo documentation has the instructions > wrong. It should be: > Black => Pin 1 > Green => Pin 4 > White => Pin 5 Hurm, I wonder what the other 3 pins are used for. They seem to be undocumented in the SRM [SNIP] > Harumph. Looks like it always boots initially from the eMMC and > U-Boot then looks at the boot switch to decide whether to continue > from eMMC or uSD. This would appear to be the default behaviour, but can be over-ridden if I read the SRM correctly. For a one off force to uSD boot, hold down the "boot" button". See Page 57 of the SRM > This sucks: the U-Boot on the eMMC doesn't have ELF support > nor API support so can't load and boot ubldr. > > Short version: The existing FreeBSD images for BeagleBone > won't work as-is. At a minimum, we'll have to replace the U-Boot > on the eMMC with one that has ELF and API enabled. I guess > I'll be spending more quality time with U-Boot. :-/ Or wipe the eMMC. In that case, then it appears it boots off the uSD card next. (Yes, I know for general user usage this wouldn't be acceptable, but for us hackers, it would be a quick way to get the board up and running in userspace and checkout any other changes that might need fixups..) Best Regards Iain
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