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Showing results for tags 'ddr memory'.
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Hi, I impelemnted a design composed of a softcore processor (RISC-V based), on a Nexys 4 DDR (Nexys A7) board. The software is stored in the DDR2 Memory. The software accesses the DDR2 memory through a controller interface. Now, I'd like to add an Audio IP that can fetch some audio samples, stored in a specific location (by the processor) in the DDR2 memory, and feed them to the audio output. However, since the interface is taken by the processor, is there a way to use that interface by the audio driver too? I read about something called the Ping Pong PHY, but apparently it is only supported in DDR3 and DDR4. Is there any equivalent way to do that?
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write and read data with DDR3 SDRAM Arty-7-35T
weilai posted a question in Digilent Microcontroller Boards
Hi guys, happy new year!! I'm currently trying to write and read data from my DDR3 SDRAM block. Instead of using any IP core, I want to write and read data diractly using Verilog in Vivado. But unforunitely, I can't find the XDC configition in XDC file of my board. so I'm stucking at how t `timescale 1ns / 1ps //ram.v module ram( input clk_i, input rst_i, input wr_en_i, input rd_en_i, input [7:0] addr_i, inout [31:0] data_io ); reg [31:0] bram[255:0]; integer i; reg [31:0] data; //add implementation code here always @(posedge clk_i or posedge rst_i) begin if (rst_i) begin for(i=0;i<=255;i=i+1) //reset bram[i] <= 32'b0; end else if (wr_en_i) begin bram[addr_i] <= data_io; end else if (rd_en_i) begin data <= bram[addr_i]; end else begin data <= 32'bz; end end assign data_io = rd_en_i? data : 32'bz; endmodule Mater xdc file for arty-35.txto realize my XDC. The attachment is DDR3 CIRCUIT, XDC file and My verilog code.thumb.jpg.95812a0cc865653adbe8f9e8bf94b258.jpg)
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