Java教程
FPGA——VIVADO DDR3 MIG IP核读写接口
本文主要是介绍FPGA——VIVADO DDR3 MIG IP核读写接口，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
一、DDR3
ddrio_mod u_ddrio_mod (
// Memory interface ports
.ddr3_addr (ddr3_addr ), // output [13:0] ddr3_addr
.ddr3_ba (ddr3_ba ), // output [2:0] ddr3_ba
.ddr3_cas_n (ddr3_cas_n ), // output ddr3_cas_n
.ddr3_ck_n (ddr3_ck_n ), // output [0:0] ddr3_ck_n
.ddr3_ck_p (ddr3_ck_p ), // output [0:0] ddr3_ck_p
.ddr3_cke (ddr3_cke ), // output [0:0] ddr3_cke
.ddr3_ras_n (ddr3_ras_n ), // output ddr3_ras_n
.ddr3_reset_n (ddr3_reset_n ), // output ddr3_reset_n
.ddr3_we_n (ddr3_we_n ), // output ddr3_we_n
.ddr3_dq (ddr3_dq ), // inout [15:0] ddr3_dq
.ddr3_dqs_n (ddr3_dqs_n ), // inout [1:0] ddr3_dqs_n
.ddr3_dqs_p (ddr3_dqs_p ), // inout [1:0] ddr3_dqs_p
.init_calib_complete (init_calib_complete), // output init_calib_complete
.ddr3_cs_n (ddr3_cs_n ), // output [0:0] ddr3_cs_n
.ddr3_dm (ddr3_dm ), // output [1:0] ddr3_dm
.ddr3_odt (ddr3_odt ), // output [0:0] ddr3_odt
// Application interface ports
.app_addr (app_addr ), // input [27:0] app_addr
.app_cmd (app_cmd ), // input [2:0] app_cmd (write 000,read 001,write bytes 011)
.app_en (app_en ), // input app_en
.app_wdf_data (app_wdf_data ), // input [127:0] app_wdf_data
.app_wdf_end (app_wdf_end ), // input app_wdf_end
.app_wdf_wren (app_wdf_wren ), // input app_wdf_wren
.app_rd_data (app_rd_data ), // output [127:0] app_rd_data
.app_rd_data_end (app_rd_data_end ), // output app_rd_data_end
.app_rd_data_valid (app_rd_data_valid ), // output app_rd_data_valid
.app_rdy (app_rdy ), // output app_rdy
.app_wdf_rdy (app_wdf_rdy ), // output app_wdf_rdy
.app_sr_req ('b0 ), // input app_sr_req(This input is reserved and should be tied to 0.)
.app_ref_req ('b0 ), // input app_ref_req
.app_zq_req ('b0 ), // input app_zq_req
.app_sr_active ( ), // output app_sr_active
.app_ref_ack ( ), // output app_ref_ack
.app_zq_ack ( ), // output app_zq_ack
.ui_clk (clk ), // output ui_clk
.ui_clk_sync_rst (ui_clk_sync_rst ), // output ui_clk_sync_rst
.app_wdf_mask (app_wdf_mask ), // input [15:0] app_wdf_mask
// System Clock Ports
.sys_clk_i (sys_clk_i ),
.sys_rst (sys_rst ) // input sys_rst
);
二、写
//////////////////////////////////////////////////////////////////////////////////
// Company:
// Engineer:
//
// Create Date: 2022/03/05 15:56:56
// Design Name CNLUZT:
// Module Name: ddr_wrapp
// Project Name:
// Target Devices:
// Tool Versions:
// Description:
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////
module ddr_wrapp(
//sys port
clk ,
rst_n ,
en ,
addr ,
dat_i ,
done ,
busy ,
//ddrctr interface port
app_cmd ,
app_addr ,
app_en ,
app_wdf_data,
app_wdf_end ,
app_wdf_wren,
app_rdy ,
app_wdf_rdy
);
//sys param
parameter ADDR_W = 28;
parameter DATA_W = 128;
//state mechine param
parameter STATE_W = 3 ,
IDLE = 3'b001 ,
WR = 3'b010 ,
ADDR = 3'b100 ;
//sys port
input clk ;
input rst_n ;
input en ;
input [ADDR_W-1:0] addr ;
input [DATA_W-1:0] dat_i ;
output done ;
output busy ;
//ddrctr interface port
output [2:0] app_cmd ;
output [ADDR_W-1:0] app_addr ;
output app_en ;
output [DATA_W-1:0] app_wdf_data ;
output app_wdf_end ;
output app_wdf_wren ;
input app_rdy ;
input app_wdf_rdy ;
//ddrctr interface signal
reg [2:0] app_cmd = 'b0;
reg [27:0] app_addr = 'b0;
wire app_en ;
reg [127:0] app_wdf_data = 'b0;
wire app_wdf_end ;
wire app_wdf_wren ;
//sys signal
reg done ;
reg busy ;
//state mechine singal
reg [STATE_W-1:0] state_c ;
reg [STATE_W-1:0] state_n ;
wire idl2wr_start ;
wire wr2addr_start ;
wire addr2idl_start ;
//flag singal
wire wr_end ;
wire cmd_end ;
always@(posedge clk or negedge rst_n)begin
if(!rst_n)begin
state_c <= IDLE;
end
else begin
state_c <= state_n;
end
end
always@(*)begin
case(state_c)
IDLE: begin
if(idl2wr_start)begin
state_n = WR;
end
else begin
state_n = state_c;
end
end
WR:begin
if(wr2addr_start)begin
state_n = ADDR;
end
else begin
state_n = state_c;
end
end
ADDR:begin
if(addr2idl_start)begin
state_n = IDLE;
end
else begin
state_n = state_c;
end
end
default:begin
state_n = IDLE;
end
endcase
end
assign idl2wr_start = state_c == IDLE && en;
assign wr2addr_start = state_c == WR && wr_end;
assign addr2idl_start = state_c == ADDR && cmd_end;
//flag
assign wr_end = (app_rdy & app_wdf_rdy & app_wdf_wren & state_c == WR);
assign cmd_end = (app_rdy & app_wdf_rdy & app_en & (state_c == ADDR));
always @(posedge clk)begin
if(state_c == IDLE & en)begin
app_cmd <= 3'b000;
app_addr <= addr;
app_wdf_data <= dat_i;
end
end
assign app_wdf_wren = (state_c == WR) & app_rdy & app_wdf_rdy;
assign app_wdf_end = (state_c == WR) & app_rdy & app_wdf_rdy;
assign app_en = (state_c == ADDR) & app_rdy & app_wdf_rdy;
always @(posedge clk or negedge rst_n)begin
if(!rst_n)
done <= 0;
else if(cmd_end)
done <= 1;
else
done <= 0;
end
always @(posedge clk or negedge rst_n)begin
if(!rst_n)
busy <= 0;
else if(state_c == IDLE & en)
busy <= 1;
else if(done)
busy <= 0;
end
endmodule
三、读
//////////////////////////////////////////////////////////////////////////////////
// Company:
// Engineer:
//
// Create Date: 2022/03/05 15:56:56
// Design Name: CNLUZT
// Module Name: ddr_wrapp
// Project Name:
// Target Devices:
// Tool Versions:
// Description:
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////
module ddr_rdapp(
//sys port
clk ,
rst_n ,
en ,
addr ,
dat_o ,
nd ,
busy ,
//ddrctr interface port
app_cmd ,
app_addr ,
app_en ,
app_rd_data ,
app_rd_data_end ,
app_rdy ,
app_rd_data_valid
);
//sys param
parameter ADDR_W = 28;
parameter DATA_W = 128;
//state mechine param
parameter STATE_W = 3 ,
IDLE = 3'b001 ,
RD = 3'b010 ,
ADDR = 3'b100 ;
//sys port
input clk ;
input rst_n ;
input en ;
input [ADDR_W-1:0] addr ;
output [DATA_W-1:0] dat_o ;
output nd ;
output busy ;
//ddrctr interface port
output [2:0] app_cmd ;
output [ADDR_W-1:0] app_addr ;
output app_en ;
input [DATA_W-1:0] app_rd_data ;
input app_rd_data_end ;
input app_rdy ;
input app_rd_data_valid ;
//ddrctr interface signal
reg [2:0] app_cmd = 'b0;
reg [27:0] app_addr = 'b0;
wire app_en ;
//sys signal
reg [DATA_W-1:0] dat_o ;
reg nd ;
reg busy ;
//state mechine singal
reg [STATE_W-1:0] state_c ;
reg [STATE_W-1:0] state_n ;
wire idl2addr_start ;
wire addr2rd_start ;
wire rd2idl_start ;
//flag singal
wire rd_end ;
wire cmd_end ;
always@(posedge clk or negedge rst_n)begin
if(!rst_n)begin
state_c <= IDLE;
end
else begin
state_c <= state_n;
end
end
always@(*)begin
case(state_c)
IDLE: begin
if(idl2addr_start)begin
state_n = ADDR;
end
else begin
state_n = state_c;
end
end
ADDR:begin
if(addr2rd_start)begin
state_n = RD;
end
else begin
state_n = state_c;
end
end
RD:begin
if(rd2idl_start)begin
state_n = ADDR;
end
else begin
state_n = state_c;
end
end
default:begin
state_n = IDLE;
end
endcase
end
assign idl2addr_start = state_c == IDLE && en;
assign addr2rd_start = state_c == ADDR && cmd_end;
assign rd2idl_start = state_c == RD && rd_end;
//flag
assign rd_end = (app_rdy & app_rd_data_end & (state_c == RD) );
assign cmd_end = (app_rdy & app_en & (state_c == ADDR) );
always @(posedge clk)begin
if(state_c == IDLE & en)begin
app_cmd <= 3'b001;
app_addr <= addr;
end
end
assign app_en = (state_c == ADDR) & app_rdy;
always @(posedge clk or negedge rst_n)begin
if(!rst_n)
dat_o <= 0;
else if((state_c == RD) & app_rd_data_valid)
dat_o <= app_rd_data;
else if(nd)
dat_o <= 0;
end
always @(posedge clk or negedge rst_n)begin
if(!rst_n)
nd <= 0;
else if(cmd_end)
nd <= 1;
else
nd <= 0;
end
always @(posedge clk or negedge rst_n)begin
if(!rst_n)
busy <= 0;
else if(state_c == IDLE & en)
busy <= 1;
else if(nd)
busy <= 0;
end
endmodule
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