[time-nuts] Looking for Dual-Time "Atomic Clock"

[Didier Juges]

Paul,

If you use a different 8051, particularly one that comes from another
vendor, things like the UART, ADC, timers, watchdog, the clock and port IOs
are likely to be configured and addressed differently because most vendors
have their own peripherals different from the original Intel (or Philips)
specs. Most of the differences will be in the file that configures the
ports and peripherals, with some tweaking of the drivers and Interrupt
Service Routines. The code is very modular, so once the drivers are
modified to accommodate the new peripherals, the main code should not
require any change (famous last words).

The chip I use is made by Silabs and they have their own features (used to
expand the original 8051 architecture) that may be available in other forms
under other names from other vendors, like SFR pages, crossbar and such.

The compiler is generic 8051 (Keil) so it will generate code that runs on
every 8051, aside from the peripheral issues listed above.

Didier KO4BB



On Wed, Jan 22, 2014 at 4:06 PM, Paul Berger <phb.hfx at gmail.com> wrote:

> Didier:
>
> This is of interest to me however I wonder is there anything in the code
> that is tied to this specific 8051 derived processor?  I have a number of
> variations some going all the way back to the original Intel 8751s and
> wonder if one might be used in place of the processor you used.  I would be
> capable of making code and wiring changes if necessary as long as it did
> not require a complete rewrite.
>
> BTW great web site I have found a lot of good information here
>
> Paul.
>
>
>
>
> On 1/22/14 5:43 PM, Didier Juges wrote:
>
>> How about free software?
>>
>> http://www.ko4bb.com/ham_radio/Clock/
>>
>> If you want a piece of hardware, my Thunderbolt monitor could relatively
>> easily be convinced to display UTC and local time on its two line display.
>> Some coding would be required.
>>
>> http://www.ko4bb.com/Timing/GPSMonitor/kit.php
>>
>> Didier KO4BB
>>
>>
>> On Tue, Jan 21, 2014 at 4:48 PM, Richard Solomon <w1ksz at earthlink.net
>> >wrote:
>>
>>  I love that title, nothing Atomic about it but the Marketing types love
>>> it.
>>>
>>> What I am looking for is a way to display Local Time (MST) and Zulu (GMT)
>>> time in a small (6" X 8" or similar) package. There must be two displays
>>> and
>>> both lock up to NBS.
>>>
>>> Has anyone seen such a thing ?
>>>
>>> Thanks,
>>>
>>> Dick S., W1KSZ
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