[time-nuts] Simple open source microcontroller solution to tune DDS needed

[Jerry Hancock]

I was using PIC chips to talk to AD9854 and 9851 and switched to the low cost Arduino boards as they are so much easier to program and have so much accessible I/O and adapter boards.  I know there is a lot of code out there for AD chips as it could be a little tricky to clock the bits out to the various registers.  The nice thing about the Arduino boards is that they have built in serial so whatever you write can be easily converted to USB control for both error logging and setting of parameters.  There are ethernet shields, wireless, etc.  There are a lot of AD9854 codes out there that can probably be used as a foundation for the AD9836.


> On Dec 13, 2017, at 12:10 PM, Adrian Godwin <artgodwin at gmail.com> wrote:
> 
> Maybe this one ?
> 
> http://www.qsl.net/pa3ckr/bascom%20and%20avr/ad9951/index.html
> 
> There are probably many others
> 
> 
> On Wed, Dec 13, 2017 at 8:03 PM, Richard (Rick) Karlquist <
> richard at karlquist.com> wrote:
> 
>> I need a very simple controller to tune a DDS with up/down
>> switches (imagine setting the time on a clock).  A DDS
>> chip, such as an AD9836 would go on a PC board and a couple
>> of pushbuttons would tell the controller to tune up or
>> down.
>> 
>> Before reinventing this wheel, I thought I would see if
>> anyone knows of a similar solution that can be leveraged.
>> What I would like is both hardware and software, where
>> the software could be edited to accommodate the up/down
>> buttons.  A last resort would be to write software from
>> scratch.  My software skills are extremely limited.
>> Cutting and pasting code might work for me.
>> 
>> I need to be able to embed this onto an existing PC board.
>> I can't use a preexisting "daughter" card, other than
>> to copy the design of the card.
>> 
>> Rick Karlquist
>> N6RK
>> 
>> 
>> 
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