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Switch Test flowchart

Enter the flowchart symbols and connect as in the adjoining figure.

The PUSH 1 = 1 symbol turns on Light1 and turns OFF Light 2.

The PUSH2 = 1 symbol does the reverse.

Note that both lights are OFF when PUSH1 and PUSH 2 are OFF.

Note that PUSH1 AND PUSH2 conditions are not covered with this flowchart.

Simulate the operation as you press the two buttons corresponding to PUSH1 and PUSH2.

Switch Test BASIC code

The above image shows the resultant code from your flowchart. You can identify the steps from the The PUSH 1 = 1 symbol turns on Light1 and turns OFF Light 2.T.

Download to your system and connect switches to SWITCH1 and SWITCH2 on the Control 7 board.

You should see LIGHTS1 and LIGHT2 come on when the switches are pressed.

Switch Test discussion

If you look closely at the flowchart and the resultant code you can see a problem caused if BOTH SWITCH1 and SWITCH2 are pressed.

There is no path or direction for this particular event. In fact, if SWITCH1 is pressed, the program always loops to the first option and never gets down to checking on SWITCH2.

You can have a try with the flow chart and fix up the problem by having a special event linked to both SWITCH1 AND SWITCH2 being pressed.

This is the AND option that can be easily placed into your TEXT based BASIC program.

The line is

if PUSH1 = 1 AND PUSH2 = 1 Then BothOn.

You have to add another subroutine called BothOn that has both lights in he ON state.

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