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  • Author Author: kurthjwerner
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time programming

kurthjwerner

I need to know how to program the intern timer, or does a timer not excist in the Ras Pi?

 

I must  learn to program the  GPIO´s together with the intern timer:

 

Here is my task: time based programming of the GPIO4

 

It is a starting maskin for sailboat racing:

 

To start the program, i have an extern switch, that even starts the first signal (hooter)

After 60 seconds, the program must set the GPIO4 high again (for appr. 30 milliseconds).

Then, after 120 seconds, the program must set GPIO4  high again ( ”      ” ”  ”       )   to give a third signal.

Finally, after 60 seconds, the program must set the GPIO4 high again ( ”  ”   ”    ” ) for the final start

signal hooter for all boats.

I´m very exited, programming this little wonder maskin, and i would be very thankfull to you guy´s, if

you would be able to help me now!

(i´ve three other projects, when i finished this one!!)

  • Hi Kurt,

     

    The Pi runs Linux which provides the timing functions to applications.

    These functions are identical regardless the underlying hardware.

    This is important to know, because it then helps when searching for resources; you're not restricted to searching for Pi-specific information related to timing, instead you can search for information based on the language you wish to use in Linux.

     

    Having said that, it could be too soon to specify the sequence and timing you need. To take a step back, choose a language you're comfortable with (e.g. Python, C, etc) and then examine how to control the GPIO, and examine the time features available in an API offered in that language.

    Some languages and middleware even provide higher-layer capabilities that are timing related (e.g. automatically execute code at a certain rate).

    If you're open to trying any language, check out MagPi online magazine, it has loads of Pi-related beginner tutorials that address GPIO but also example games and apps, and the principles could be extended after playing with the basics.