Unit 2 Project 3: Flash LEDs in One Hz Frequency using LOOP

Project: Please read Chapter 3 of your textbook for writing subroutines and Chapter 4 of your textbook; then, write assembly programs to do the following:

The clock frequency is Dragon 12 board 24MHz.

Flash all LEDs in one Hz frequency when running your program.

You must complete the given delay subroutine using LOOP to time approximately one second.

You need to turn on all the LEDs, then, call this subroutine, turn off all LEDs, and then, call this subroutine.

Note:

NOP consumes 1 Clk Cycle

DEC consumes 4 Clk Cycles

BNE consumes 3 Clk Cycles

Delay subroutine template

L2         LDAA    #240

             STAA    R1

L1         NOP                 ;1 Clk Cycle

             NOP                 ;1 Clk Cycle

             NOP                 ;1 Clk Cycle

             DEC     R1        ;4 Clk Cycles

             BNE     L1         ;3 Clk Cycles

Total number clock is that 10 Clk x 240 times = 2400 Clk = 0.1ms

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