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Altera_Forum's avatar
Altera_Forum
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13 years ago

Writing to SRAM from VHDL and using NIOS

Dear All,

For a schoolproject I am working on a spectrum analyzer. I have downloaded the Altera University program and I modified de C code so it will display a nice coordinate system. Outside NIOS I programmed a FFT in VHDL with input from an external ADC. So far this all works.

What I want to do now is build a bar graph. I would like to write this directly to the SRAM from VHDL but this is already occupied by NIOS. So I understand I now need to make a custom peripheral to acces this SRAM from VHDL but I can't figure out how. I do understand VHDL but all things that have to do with NIOS and SOPC are completely strange to me.

Please give me some tips.

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

    How did you connect your component to the SRAM controller? If you do it in SOPC builder, you don't really have to care about the SRAM controller, or what kind of memory you are using. That's the big advantage of using Avalon memory mapped interfaces, your design can work with any kind of memory, as long as it is supported by SOPC builder.

    Are you using SignalTap? You can use it to monitor your component and see what it is doing.