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Altera_Forum
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15 years ago

Problem with reading the ROM data using Avalon Interface

Hi all

I am trying to learn the usage of avalon interface

I created a ROM in verilog and i want to read the data into Nios

Rom is connected as a avalon slave to Nios II processor

But i see the data read into NIOS from the particular address is not as i modeled the ROM

What is the mistake i am doing Please help

regards

M Kalyansrinivas

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    Here with i paste the result i am getting

    Memory 32 should have an output of 42 but it shows 0 which is incorrect

    nios2-terminal: connected to hardware target using JTAG UART on cable

    nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0

    nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)

    Hello from Nios II!

    data_rom_out 0 = 0

    data_rom_out 1 = 12

    data_rom_out 2 = 14

    data_rom_out 3 = 16

    data_rom_out 4 = 18

    data_rom_out 5 = 20

    data_rom_out 6 = 22

    data_rom_out 7 = 24

    data_rom_out 8 = 26

    data_rom_out 9 = 28

    data_rom_out 10 = 30

    data_rom_out 11 = 32

    data_rom_out 12 = 34

    data_rom_out 13 = 36

    data_rom_out 14 = 38

    data_rom_out 15 = 40

    data_rom_out 16 = 42

    data_rom_out 17 = 44

    data_rom_out 18 = 46

    data_rom_out 19 = 48

    data_rom_out 20 = 50

    data_rom_out 21 = 52

    data_rom_out 22 = 54

    data_rom_out 23 = 56

    data_rom_out 24 = 58

    data_rom_out 25 = 60

    data_rom_out 26 = 62

    data_rom_out 27 = 64

    data_rom_out 28 = 66

    data_rom_out 29 = 68

    data_rom_out 30 = 70

    data_rom_out 31 = 72

    data_rom_out 32 = 0

    data_rom_out 33 = 12

    data_rom_out 34 = 14