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| Component macros are sections of code that have been written to support the components included with Flowcode 6.<br />
| | For an excellent introduction guide, we recommend [https://www.flowcode.co.uk/education/ Introduction to microcontroller programming] |
| They take all the effort out of using these components.<br />
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| This exercise uses them to control a particularly complicated, but very common device, the Liquid Crystal Display (LCD).<br />
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| In this case, it uses a LCD to display elapsed time.
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| __TOC__
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| ==The core sequence==
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| The flowchart sequence for the elapsed time will be:
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| : Check if the switch is pressed.
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| :: If it isn't, go back to the beginning.
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| :: If it is:
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| ::: initialize the LCD;
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| ::: display the text "Elapsed time";
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| ::: initialize the time;
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| ::: display the time
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| ::: wait for one second;
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| ::: increment the time;
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| ::: display the new time;
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| ::: loop back and repeat this process.
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| ==Set up the flowchart==
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| * Open Flowcode, and set up the new flowchart as described in [[Exercise - Creating Your First Flowchart|Creating Your First Flowchart]].
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| ==Create the core sequence==
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| * Locate the 'LCD' inside the 'Outputs' toolbox.
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| :* Hover over the image to the left of the 'LCD' label, and click on the down-arrow that appears.
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| :* Click on the 'Add to system panel' option to select it.
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| :* Zoom in until the LCD image is big enough to read.(See [[System Panel]] for information on how to zoom.)
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| * Click and drag an infinite loop between the 'BEGIN' and 'END' icons.
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| * Inside the loop:
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| :* Click and drag a 'Component macro' icon.
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| ::* Double click on it to open the dialogue box.
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| : The program 'knows' which components you have added to the System or Dashboard panel, and modifies the list of available commands accordingly.
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For an excellent introduction guide, we recommend Introduction to microcontroller programming