这是个用矩阵键盘控制步进电机圈数和转速的程序，参数设定在触摸屏上显示-This is a matrix keyboard to control the stepper motor number of turns and speed program parameter settings on the touch screen display

非递归中序遍历二叉树：要求从键盘输入二叉树各结点的值，并使用二叉链表来存储二叉树；使用非递归算法遍历二叉树，在屏幕上打印出二叉树中序遍历序列。-Non-recursive traversal of binary tree: the input binary tree node value from the keyboard and use the binary tree to store binary tree non-recursive algorithm for binary tree t