Input using logic switches

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Input using logic switches
In this project, we will use port a as both input
and output, by connecting three input bits to
logic switches, and connecting three output bits
to LEDs. Your assignment will be to extend an
example program. Port_a bits 4,5,6 for output,
will be wired to LEDs (as before). Port_a bits
0,1,2 for input, will be wired to three of the
0-1 logic switches on the IDL-800.
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You may choose to use SW0-2
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Example inputtst.asm
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Example cont.
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Example cont.
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Your Assignment

• Lab Preparation
• Create and test the inputtst.asm program on the
  wookie simulator.
• Modify your program, so that input PA_0 controls
  PA_4 output differently instead of determining
  whether PA_4 will be on or not, it will determine
  how fast PA_4 flashes. 0-slow, 1-fast. The
  other inputs/outputs can work to echo the state
  of the switches without flashing.
• Test your program on the wookie.
• Modify your program to work on the
  68HC11/Microstamp.
• Hands-On portion next Monday
• Wire your input switches, assembly, download, and
  test/debug your program from step 4 on the
  MicroStamp.
• Demonstrate your working program to your
  instructor.