Description
1. Using VHDL to perform the following tasks on the FPGA board. [20 marks]
a. Input a 7-bit pattern using the switches (i.e. sw6 to sw0) to construct the last digit of your SID (e.g. your SID is
1155123456, the last digit is “6”), display the digit onto the two leftmost 7-segment displays (e.g. “66”), and leave the
rightmost 7-segment displays blank.
b. By pressing the center button (i.e. btnC), move the patterns to the two rightmost 7-segment displays.
c. By pressing the center button again, move the patterns back to the two leftmost 7-segment displays, and so on.
2. Using VHDL to implement a J-K Flip-Flop with the following truth table. [40 marks]
PRESET CLEAR J K CLOCK Q Q’ Remarks
0 1 X X X 1 0 Preset
1 0 X X X 0 1 Clear
0 0 X X X 1 1 Unstable
1 1 0 0 ↓ Q Q’ No change
1 1 0 1 ↓ 0 1 —
1 1 1 0 ↓ 1 0 —
1 1 1 1 ↓ Q’ Q Toggle
1 1 X X 1 Q Q’ No change
X = Don’t Care
↓= Falling Edge
a. Use the switches (i.e. sw3, sw2, sw1, and sw0) as the inputs (i.e. PRESET, CLEAR, J, and K) respectively.
b. Use the center button (i.e. btnC) as the CLOCK. Noted that pressing down the button is HIGH, releasing the button is
LOW. Also, since we are not using the real CLOCK signal on the board, please avoid naming this CLOCK as “CLK” or
“CLOCK” in the VHDL codes.
c. Use the LEDs (i.e. led1 and led0) as the outputs (i.e. Q and Q’) respectively.
THE END
