[time-nuts] Re: Clock display on Linux systems?

[David Taylor]

On 05/12/2021 20:53, Adam Space wrote:
> Most distributions of Linux already have a "clock" application that shows
> the system time, but I am wondering how to program a more customizable
> display on a Linux system / Raspberry pi. There are a few solutions that
> pop up by googling the issue, but these are all insufficient. For example,
> the only solutions in Python (which I would prefer to use if possible, but
> not necessary) I have found are 1) using a library like pygame or tkinter
> to build a display or 2) doing something more barebones like displaying the
> time and sleep() ing for a second. 1) is terribly inefficient for a display
> of accurate time, because either you have a refresh rate that is low and
> the clock updates with significant lag, or you have a high refresh rate
> which eats up large processing power. 2) is also inefficient because the
> frequency of a local clock may be poor, so long term accuracy can only be
> sustained with synchronization via NTP for example.
> 
> Perhaps there are lower level Linux commands that could be used for this?
> I'm not sure. Any suggestions are welcome.
> 
> Adam

Adam,

I have a simple digital wall clock program for the Raspberry Pi if it's of any 
help.  FreePascal/Lazarus both source and executable available:

   https://www.satsignal.eu/raspberry-pi/DigitalClock.html

Cheers,
David
-- 
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