/DE10-lite-Calculator

Scientific calculator on Intel DE10-lite FPGA.

Primary LanguageVerilog

DE10-lite-Calculator

Scientific calculator on Intel DE10-lite FPGA + NIOS II processor.

  • Calculator is capable of the following:

    • Addition, Subtraction, Multiplication, Division, Log10, Power, Factorial, Degrees to Radians, Negative numbers
    • Using Verilog to debounce keypresses
    • Carrying over answer of previous operation to operand 0 of next equation
    • Displaying answer on DE10-lite seven segment displays (truncated)
    • Displaying "double" formatted answer to a PC using NIOS II UART

  • Requires a Digilent PMOD keypad to run this program: https://store.digilentinc.com/pmod-kypd-16-button-keypad/ -NOTE THIS PROJECT WAS DONE USING QUARTUS 18.1; IF YOU SEE WEIRD RESULTS IT'S DUE TO VERSION DIFFERENCES

Pinout for DE10-lite (PG 30): https://www.intel.com/content/dam/www/programmable/us/en/portal/dsn/42/doc-us-dsnbk-42-2912030810549-de10-lite-user-manual.pdf

Pinout for keypad is as follows:

(Keypad Pin,DE-10 lite): (Pin 1, Pin_W12), (Pin 2, Pin_AB12), (Pin 3, Pin_AB11), (Pin 4, Pin_AB10), (Pin 5, GND), (Pin 6, 5/3.3V), (Pin 7, Pin_AB13), (Pin 8, Pin_Y11), (Pin 9, Pin_W11), (Pin 10, Pin_AA10), (Pin 11, GND), (Pin 12, 5/3.3V)

General State Machine:

State 0:

  • Reset (async: enter this state via KEY0 pushbutton)

State 1:

  • Type in operand 0 using keypad, enter the number by pressing KEY1 pushbutton
  • Advance to state 2

State 2:

  • Choose operator
    • SW9 is off
      • SW0 is on -> Add
      • SW1 is on -> Sub
      • SW2 is on -> Mul
      • SW3 is on -> Div
    • SW9 is on
      • SW0 is on -> Log_2
      • SW1 is on -> Pow
      • SW2 is on -> Fact
      • SW3 is on -> D2r
  • Enter desired operator by pressing KEY1 button
  • Advance to state 3

State 3:

  • Type in operand 1 using keypad, enter the number by pressing KEY1 button
  • Advance to state 4

State 4:

  • Show the output of the operation. Output will show in NIOS II uart terminal (in double format); output will also show on SSD on FPGA dev board. Obviously the uart terminal will show the best and most accurate results
  • Press KEY1 to use output as operand0 and advance to state 2
  • Press KEY0 to reset operation and advance to state 0

Easiest way to run the project:

  1. Download the .qar file
  2. Open the .qar file using Quartus
  3. Run compilation
  4. Program the FPGA
  5. In file explorer, open "Calculator_restored -> software -> nios2_uart_sw_bsp" directory
  6. Edit "settings.bsp" 6a. Change "BspGeneratedLocation" path to whatever the path to the directory is on your pc (inside of generated Calculator_restored project directory) 6b. Change "SopcDesignFile" path to whatever the path to the .sopc file is on your pc
  7. In Quartus -> tools -> nios ii software build tools for eclipse
  8. Eclipse opens, open workspace at "Calculator_restored -> software"
  9. Go to "File -> import", then "general -> existing projects in workspace", then "browse" 9a. Navigate to "Calculator_restored -> software" and press ok 9b. Under "Projects", "nios2_uart_sw" and "nios2_uart_sw_bsp" will show up, make sure they have check-marks next to them and press finish 9c. "nios2_uart_sw" and "nios2_uart_sw_bsp" should show up under project explorer at this point
  10. Go to "Nios II -> BSP Editor" in top bar
  11. "File -> open", navigate to "Calculator_restored -> software -> nios2_uart_sw_bsp", and open "settings.bsp"
  12. Hit "generate" and exit BSP editor
  13. Right-click "nios2_uart_sw_bsp" directory in the project explorer and press "NIOS II -> Generate BSP"
  14. Project -> Build all
  15. Run -> Run configurations 15a. Double-click "nios II hardware" 15b. "New_configuration" will show up, click on it 15c. Under "new configuration", go to project, press on project name and select "nios2_uart_sw" 15d. Go to "target connection", make sure you can see USB Blaster (if you can't, hit refresh connections), select the USB Blaster, and click run