Monitoring an Input Pin by Polling

• Breadboard an input switch pulled up and connect it to an open pin on port A of your Pic connected to a single LED 7 segment display.
• Create a program to count the number of times the button is pushed by polling (continually sampling) the status of the input pin.
• Base this program on the flowchart. To understand flowcharts see these links.
• Remember program organization.
• Consider the following when writing your code;
  • Program Initialization
    • same as counting program
    • also PortA = 0 'to initialize
    • TrisA - set whole port or at least specific pin to input
    • It may help to understand memory organization and special function registers
  • Is Button Pushed
    • if statement
    • testbit built in routine
  • Increment Count and Display
    • use the previous assignment code with adjustment.