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lab-04 - CSE 380 Lab#4 Spring 2009 Objective In this lab...

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CSE 380 Lab #4 Spring 2009 Objective In this lab, you will use parallel I/O to interface with the ARM processor and create a library for your subroutines. The ARM board has a seven segment display, four LEDs, and four DIP switches. You will learn how to read from the switches and control the seven-segment display and LEDs. In addition to using parallel I/O, HyperTerminal will be also used to communicate with the processor as you did in lab #3. Description Write an ARM assembly language subroutine, called lab4 , which allows the user to repeatedly enter a hexadecimal digit (0 through F) in HyperTerminal . The entered digit should be displayed on the seven- segment display. If the user enters a value other than 0 through F, the seven-segment display should not change. If the user hits the space bar, the DIP switches should be read. The value read should be interpreted as a 4-bit number, with DIP switch 4 representing the most significant bit. This value should be displayed on the seven-segment display. The LEDs should be illuminated to reflect which switches
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