[time-nuts] ARM boards for low-cost GPSDOs

Bob Camp lists at rtty.us
Sat Apr 12 19:10:35 EDT 2014


Hi

If you are doing a GPSDO, you probably are playing a lot with things like clock trees and PLL frequencies. There are other free toolchains (often vendor specific) that can make this *much* easier. Not all ARM’s are the same in terms of clocking, so it’s not a one size fits all sort of thing. 

Bob

On Apr 12, 2014, at 7:01 PM, Jim Lux <jimlux at earthlink.net> wrote:

> On 4/12/14, 12:50 PM, Bob Camp wrote:
>> Hi
>> 
>> I’ve been working with some friends on an ARM based Arduino project. The support for ARM in the Arduino tool chain is still not really up to speed. It’s actually been faster / easier to take the stuff we need over to another board and tool chain than to fight through all of the gotchas within the Arduino / ARM world. The stuff is free / easy just about any way you do it.
>> 
> 
> The teensyduino stuff from PJRC is adding quite a lot to the ARM world within the Arduino IDE.  It is true that for some of the onchip peripherals, there might not be full support, and you have to do some register writing, etc.
> 
> 
>> At the chip level, the ARM’s have already overtaken many / most of the AVR’s that you would be using.
>> 
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