Re: Reset and tutorial Using the SDRAM on Altera's DE0-Nano Boards

Altera_Forum · ‎12-23-2016

Hello,

The tutorial Using the SDRAM on Altera's DE0-Nano Boards uses the Clock Signals IP Core to provide a clock to the SDRAM.

But I found that pressing the Key(0) was not resetting.

Indeed, in altera_up_altpll.v the reset is not connected to areset of the altpll instance.

Here is a correction:

altpll PLL_for_DE_Series_Boards (
    // Inputs
    .inclk            ({1'b0, refclk}),
    .areset            (reset),
    // Outputs
    .clk            ({3'b0, outclk2, outclk1, outclk0}),
    .locked            (locked),
);
defparam
    PLL_for_DE_Series_Boards.port_areset = "PORT_USED",

It works fine, but let me know if I overlooked something.

Thanks

rsoff · ‎12-16-2018

hello,

i am trying to work with he same tutorial.

everything works fine except that the key(0) is not resetting.

i tried to use your correction but still with no success.

i noticed that in "nios_system.v" file, the reset defines as "reset_reset" and not as "reset_reset_n" as it should be:

perhapes it might be the problem.

what should i do to change it?

thanks in advance.