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Subject: Re: rpi3 and Adafruit GPS Hat
To: Diane Bruce <db@db.net>
Cc: freebsd-arm@freebsd.org
References: <47f49a55-66b0-1c02-4530-4701a3bd0c43@nethead.se>
 <20180718170157.GA40221@night.db.net>
From: Per olof Ljungmark <peo@nethead.se>
Message-ID: <69777450-a532-3f00-c2ed-426d20a6bf0e@nethead.se>
Date: Thu, 2 Aug 2018 19:29:44 +0200
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On 7/18/18 7:01 PM, Diane Bruce wrote:
> On Wed, Jul 18, 2018 at 05:10:16PM +0200, Per olof Ljungmark wrote:
>> Being a complete newbie to arm I thought a nice project would be to
>> build a NTP server with the parts in the subject line.
>>
>> Unfortunately I have almost no idea where to start, it seems FreeBSD for
>> arm have shifted around quite a bit, almost none of the googled pages I
>> find has relevance, and to add insult to injury, the Pi project
>> apparently shifted the serial ports around for the Pi3.
>>
>> What I need to achieve,
>>
>> - Stop the kernel to use the uart for console output (I have ethernet
>> and HDMI connected)
> 
> No need.
> 
> change your config.txt
> 
> #dtoverlay=pi3-disable-bt
> device_tree_address=0x4000
> kernel=u-boot.bin
> enable_uart=1
> 
> This moves the console port to the less capable micro uart port
> this will free up the good uart (the pl011 device) as /dev/ttyu0
> 
> Remove the pi3-disable-dt in config.txt
> enable_uart=1 is needed.

But would this move uart0 to pin 14 & 15? It moves the serial console to
uart1 which is fine bit if I want to talk to the hat I need uart0 on
pins 14 and 15.