When dealing with LCDs, refresh rate is not much of a concern since they use a different technology to draw the image. Before we dive into the coding, we need to understand what we are working with. The basics of the switch() statement is that you watch a variable, and depending what the variable's value is, a different case in the switch() is activated. This property makes it very easy to make a program pointer that will move through your code, applying all the appropriate inputs and outputs at the correct time. There is also a default case, so that you can put a section of the program to happen when the variable you are watching does not match one of the programmed cases.įor the first example, we'll have a passive code.
#Iscribe lcd tablet serial#
By watching the serial monitor, you can see the program count to 5 over 5 seconds. The switch statement sits in each case until 1 second has passed, then moves to the next. See the attached code, read the comments, and upload it to see how it works before moving on. * This code is to show the basic workings of a switch statement. ProgramCount = 0 //start at the beginning Serial.begin(9600) // initialize serial communication: Int programCount = 0 //variable to move through the program To 10 in the serial monitor using a delay. Now that we know the basics of a switch statement, we can add in a basic digital input. We'll use a button to trigger the movement to the next state.
In the first case, we'll use a counter to store how long the button has been pressed. Once it has been held for 5 seconds, we'll move to the next state. Watch the serial monitor to see when the program is done. See the code below, then upload it to see how it works before moving to the next step. Since these are just test programs, you can leave the board plugged into the computer so the Arduino can receive power.
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