Stepper motor control using hex keypad for input and LCD display

Projects General Guidance
1

Iam new to Arduino & C language.

I need to control stepper motor with different combinations of forward speed & reverse speed and number of rotations.

We need 300 settings for our application. For each setting, 4 digit code from Hexpad programmed to call while function as mentioned in code.

My project requirement is while function should run indefinitely with present key input and break the present while function & go to the next selected while function.

4 digit Hexpad key code is as follows

10AB, 10AC, 10AD, 10AB....

Iam forwarding my code.

With my code two problems encountered

  1. Till 10AD, while function starting after completion of 4 digit input command.

After inclusion of while command with 10BA, the function starting with only pressing of 10A
and it is not waiting till the completion of 4 digit code.

Please suggest me how to write 4 digit code for each setting.

  1. I have written a code for while function for each setting,
    please suggest me how to break while function as soon as new 4 digit code
    entered from HEX keypad and starts new while function.

stepper.txt (5.28 KB)

2

If you need to change things during a WHILE loop then you should be using WHILE. Just use IF and allow loop() to do the repetition.

Have a look at how the code is organized in Several Things at a Time

Note how each function runs very briefly and returns to loop() so the next one can be called. None of the functions tries to complete a task in one call. And there may be dozens of calls to a function before it is actually time for it to do anything.

Please remove all the unnecessary blank space from your Post - it makes it very difficult to read through the Thread.

And for short programs please include the code in your Post. Use the code button </>
codeButton.png

so your code 
looks like this

and is easy to copy to a text editor See How to use the forum

...R