I tryed your program, and it is working. But it seems to be constantly printing, and its printing different values as its constantly printing. The data i am reading gets triggered to send when i hit a up or down button. when i hit up it sends data to the shift register to update the 2 digit display, same thing happens when i hit down, display will go up or down 1 number each time, when i go up or down i do get a long block printed, but it then just keeps printing and printing data, and not the same as when i hit the up button to make it print that data. Some times it will print a large block of numbers, other times a small block of numbers.
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