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| − | :* Double click on the [[Input Icon Properties|Input icon]].
| + | For an excellent introduction guide, we recommend Introduction to microcontroller programming CP4375 which can be found at https://www.matrixtsl.com/learning/ |
| − | :: This opens the 'Properties: Input' dialogue box, allowing you to configure the way the program treats information from the switch.
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| − | :: This information will be contained in a variable called 'switch'.
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| − | ::* Click on the down arrow at the right-hand end of the 'Variable:' box to open the variables dialogue box.
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| − | ::* Hover to the left of the 'Variables' label and click on the down arrow that appears.
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| − | ::* Click on the 'Add new' option to open the 'Create a New Variable' dialogue box.
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| − | ::* [[Creating Variables|Create a new variable]] named "switch" with initial value "0" and description "Copies the state of the switch"
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| − | ::* Leave the 'Variable type:' as 'Byte'.
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| − | ::: (For more information about variables, see [[Creating Variables]] and [[Variable Types]].
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| − | ::: (The resulting dialogue box is shown opposite.)
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| − | [[File:gen_exerciseFirstFlowchart_inputprops_01.png|250px|right]]
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| − | :* Finish configuring the input properties as follows:
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| − | ::* Change the 'Display name:' to "Read the switch".
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| − | ::* In the 'Variable:' box, type the name of the variable you created "switch".
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| − | ::* Leave the 'Port:' as PORT A.
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| − | ::* Select to 'Input from:' 'Single Bit' and choose bit 0.
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| − | ::: (The resulting dialogue box is shown opposite.)
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| − | : Set up like this, the program monitors the state of the switch, which will be connected to bit 0 of Port A of the microcontroller.
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| − | : When the program looks at the input switch if it is pressed, the variable 'switch' contains logic 1. If unpressed, it contains logic 0.
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| − | :* Double click on it to open the configuration dialogue box, and then: [[File:gen_exerciseFirstFlowchartadddev_deciconprops_01.png|250px|right]]
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| − | ::* Rename it "Switch pressed?".
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| − | ::* In the 'If:' box, type "switch=1".
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| − | ::* Leave the 'Swap Yes and No' box unchecked. | |
| − | ::* Click on 'OK'.
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| − | : ''This icon will be used to make the program perform what is known as a conditional branch.''
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| − | : The subsequent course of the program depends on the outcome of the condition specified in the 'Decision' icon.
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| − | : In this case, it depends on whether or not the variable 'switch' = 1.
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| − | : If it is, the program follows the 'Yes' route. If not, it follows the 'No' route.
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