Zynq PL DDR4读写测试工程
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基于XCZU21DR-2FFVD1156E开发，本文介绍对PL DDR4的读写操作，代码全部经过上板测试。
目录
添加DDR4 IP
Basic
Mode and Interface & Clocking
Controller Options
Advanced Clocking
VIO IP配置
ILA IP配置
General Options
Probe_Ports(0..7)
Probe_Ports(8..15)
Probe_Ports(16..18)
top代码
ddr4_rw代码
top.xdc内容
系统框图如下：
添加DDR4 IP
DDR4颗粒采用MT40A2G8VA-062E IT，配置如下：
Basic
Mode and Interface & Clocking
Controller Options
Advanced Clocking
VIO IP配置
ILA IP配置
General Options
Probe_Ports(0..7)
Probe_Ports(8..15)
Probe_Ports(16..18)
top代码
module ddr4_rw_top(
output c0_ddr4_act_n ,
output [16:0] c0_ddr4_adr ,
output [1:0] c0_ddr4_ba ,
output [1:0] c0_ddr4_bg ,
output [0:0] c0_ddr4_cke ,
output [0:0] c0_ddr4_odt ,
output [0:0] c0_ddr4_cs_n ,
output [0:0] c0_ddr4_ck_t ,
output [0:0] c0_ddr4_ck_c ,
output c0_ddr4_reset_n ,
inout [7:0] c0_ddr4_dm_dbi_n,
inout [63:0] c0_ddr4_dq ,
inout [7:0] c0_ddr4_dqs_c ,
inout [7:0] c0_ddr4_dqs_t ,
//Differential system clocks
input c0_sys_clk_p,
input c0_sys_clk_n,
output led,
input sys_rst_n
);
//wire define
wire error_flag;
wire c0_ddr4_ui_clk ;
wire c0_ddr4_ui_clk_sync_rst ;
wire c0_ddr4_app_en ;
wire c0_ddr4_app_hi_pri ;
wire c0_ddr4_app_wdf_end ;
wire c0_ddr4_app_wdf_wren ;
wire c0_ddr4_app_rd_data_end ;
wire c0_ddr4_app_rd_data_valid ;
wire c0_ddr4_app_rdy ;
wire c0_ddr4_app_wdf_rdy ;
wire [27 : 0] c0_ddr4_app_addr ;
wire [2 : 0] c0_ddr4_app_cmd ;
wire [127 : 0] c0_ddr4_app_wdf_data;
wire [15 : 0] c0_ddr4_app_wdf_mask ;
wire [127 : 0] c0_ddr4_app_rd_data ;
wire c0_init_calib_complete;
wire addn_ui_clkout1;
wire ui_clk_sync_rst; //用户复位信号
wire init_calib_complete; //校准完成信号
wire [20:0] rd_cnt; //实际读地址计数
wire [1 :0] state; //状态计数器
wire [23:0] rd_addr_cnt; //用户读地址计数器
wire [23:0] wr_addr_cnt; //用户写地址计数器
wire out_sys_rst_n;
wire probe_out0_n;
//读写模块
ddr4_rw u_ddr4_rw(
.ui_clk (c0_ddr4_ui_clk),
.ui_clk_sync_rst (c0_ddr4_ui_clk_sync_rst),
.init_calib_complete (c0_init_calib_complete),
.app_rdy (c0_ddr4_app_rdy),
.app_wdf_rdy (c0_ddr4_app_wdf_rdy),
.app_rd_data_valid (c0_ddr4_app_rd_data_valid),
.app_rd_data (c0_ddr4_app_rd_data),
.app_addr (c0_ddr4_app_addr),
.app_en (c0_ddr4_app_en),
.app_wdf_wren (c0_ddr4_app_wdf_wren),
.app_wdf_end (c0_ddr4_app_wdf_end),
.app_cmd (c0_ddr4_app_cmd),
.app_wdf_data (c0_ddr4_app_wdf_data),
.state (state),
.rd_addr_cnt (rd_addr_cnt),
.wr_addr_cnt (wr_addr_cnt),
.rd_cnt (rd_cnt),
.error_flag (error_flag),
.led (led)
);
ddr4_0 u_ddr4_0 (
.c0_init_calib_complete(c0_init_calib_complete), // 初始化完成信号
.dbg_clk(),
.c0_sys_clk_p(c0_sys_clk_p), // 系统差分时钟p
.c0_sys_clk_n(c0_sys_clk_n), // 系统差分时钟n
.dbg_bus(),
.c0_ddr4_adr(c0_ddr4_adr), // 行列地址
.c0_ddr4_ba(c0_ddr4_ba), // bank地址
.c0_ddr4_cke(c0_ddr4_cke), // 时钟使能
.c0_ddr4_cs_n(c0_ddr4_cs_n), // 片选信号
.c0_ddr4_dm_dbi_n(c0_ddr4_dm_dbi_n), // 数据掩码
.c0_ddr4_dq(c0_ddr4_dq), // 数据线
.c0_ddr4_dqs_c(c0_ddr4_dqs_c), // inout wire [7 : 0] c0_ddr4_dqs_c
.c0_ddr4_dqs_t(c0_ddr4_dqs_t), // inout wire [7 : 0] c0_ddr4_dqs_t
.c0_ddr4_odt(c0_ddr4_odt), // output wire [0 : 0] c0_ddr4_odt
.c0_ddr4_bg(c0_ddr4_bg), // output wire [1 : 0] c0_ddr4_bg
.c0_ddr4_reset_n(c0_ddr4_reset_n), // output wire c0_ddr4_reset_n
.c0_ddr4_act_n(c0_ddr4_act_n), // output wire c0_ddr4_act_n
.c0_ddr4_ck_c(c0_ddr4_ck_c), // output wire [0 : 0] c0_ddr4_ck_c
.c0_ddr4_ck_t(c0_ddr4_ck_t), // output wire [0 : 0] c0_ddr4_ck_t
//user interface
.c0_ddr4_ui_clk(c0_ddr4_ui_clk), // output wire c0_ddr4_ui_clk 用户时钟
.c0_ddr4_ui_clk_sync_rst(c0_ddr4_ui_clk_sync_rst), // output wire c0_ddr4_ui_clk_sync_rst 用户复位
.c0_ddr4_app_en(c0_ddr4_app_en), // input wire c0_ddr4_app_en
.c0_ddr4_app_hi_pri(1'b0), // input wire c0_ddr4_app_hi_pri
.c0_ddr4_app_wdf_end(c0_ddr4_app_wdf_end), // input wire c0_ddr4_app_wdf_end
.c0_ddr4_app_wdf_wren(c0_ddr4_app_wdf_wren), // input wire c0_ddr4_app_wdf_wren
.c0_ddr4_app_rd_data_end(c0_ddr4_app_rd_data_end), // output wire c0_ddr4_app_rd_data_end
.c0_ddr4_app_rd_data_valid(c0_ddr4_app_rd_data_valid), // output wire c0_ddr4_app_rd_data_valid
.c0_ddr4_app_rdy(c0_ddr4_app_rdy), // output wire c0_ddr4_app_rdy
.c0_ddr4_app_wdf_rdy(c0_ddr4_app_wdf_rdy), // output wire c0_ddr4_app_wdf_rdy
.c0_ddr4_app_addr(c0_ddr4_app_addr), // input wire [27 : 0] c0_ddr4_app_addr
.c0_ddr4_app_cmd(c0_ddr4_app_cmd), // input wire [2 : 0] c0_ddr4_app_cmd
.c0_ddr4_app_wdf_data(c0_ddr4_app_wdf_data), // input wire [127 : 0] c0_ddr4_app_wdf_data
.c0_ddr4_app_wdf_mask(16'b0), // input wire [15 : 0] c0_ddr4_app_wdf_mask
.c0_ddr4_app_rd_data(c0_ddr4_app_rd_data), // output wire [127 : 0] c0_ddr4_app_rd_data
.addn_ui_clkout1(addn_ui_clkout1), // output wire addn_ui_clkout1
.sys_rst(~sys_rst_n) // input wire sys_rst
//.sys_rst(~probe_out0_n) // input wire sys_rst
);
vio_0 vio_0_inst (
.clk(addn_ui_clkout1), // input wire clk
.probe_in0(error_flag), // input wire [0 : 0] probe_in0
.probe_out0(probe_out0_n) // output wire [0 : 0] probe_out0
);
endmodule
ddr4_rw代码
module ddr4_rw (
input ui_clk, //用户时钟
input ui_clk_sync_rst, //复位,高有效
input init_calib_complete, //DDR4初始化完成
input app_rdy, //MIG 命令接收准备好标致
input app_wdf_rdy, //MIG数据接收准备好
input app_rd_data_valid, //读数据有效
input [127:0] app_rd_data, //用户读数据
output reg [27:0] app_addr, //DDR4地址
output app_en, //MIG IP发送命令使能
output app_wdf_wren, //用户写数据使能
output app_wdf_end, //突发写当前时钟最后一个数据
output [2:0] app_cmd, //MIG IP核操作命令，读或者写
output reg [127:0] app_wdf_data, //用户写数据
output reg [1 :0] state, //读写状态
output reg [23:0] rd_addr_cnt, //用户读地址计数
output reg [23:0] wr_addr_cnt, //用户写地址计数
output reg [20:0] rd_cnt, //实际读地址标记
output reg error_flag, //读写错误标志
output reg led //读写测试结果指示灯
);
//parameter define
parameter TEST_LENGTH = 1000;
parameter L_TIME = 25'd25_000_000;
parameter IDLE = 2'd0; //空闲状态
parameter WRITE = 2'd1; //写状态
parameter WAIT = 2'd2; //读到写过度等待
parameter READ = 2'd3; //读状态
//reg define
reg [24:0] led_cnt; //led计数
//wire define
wire error; //读写错误标记
wire rst_n; //复位，低有效
assign rst_n = ~ui_clk_sync_rst;
//读信号有效，且读出的数不是写入的数时，将错误标志位拉高
assign error = (app_rd_data_valid && (rd_cnt!=app_rd_data));
//在写状态MIG IP 命令接收和数据接收都准备好,或者在读状态命令接收准备好，此时拉高使能信号，
assign app_en = ((state == WRITE && (app_rdy && app_wdf_rdy))
||(state == READ && app_rdy)) ? 1'b1:1'b0;
//在写状态,命令接收和数据接收都准备好，此时拉高写使能
assign app_wdf_wren = (state == WRITE && (app_rdy && app_wdf_rdy)) ? 1'b1:1'b0;
//由于DDR4芯片时钟和用户时钟的分频选择4:1，突发长度为8，故两个信号相同
assign app_wdf_end = app_wdf_wren;
//处于读的时候命令值为1，其他时候命令值为0
assign app_cmd = (state == READ) ? 3'd1 :3'd0;
//DDR4读写逻辑实现
always @(posedge ui_clk or negedge rst_n) begin
if((~rst_n)||(error_flag)) begin
state <= IDLE;
app_wdf_data <= 128'd0;
wr_addr_cnt <= 24'd0;
rd_addr_cnt <= 24'd0;
app_addr <= 28'd0;
end
else if(init_calib_complete)begin //MIG IP核初始化完成
case(state)
IDLE:begin
state <= WRITE;
app_wdf_data <= 128'd0;
wr_addr_cnt <= 24'd0;
rd_addr_cnt <= 24'd0;
app_addr <= 28'd0;
end
WRITE:begin
if(wr_addr_cnt == TEST_LENGTH - 1 &&(app_rdy && app_wdf_rdy))
state <= WAIT; //写到设定的长度跳到等待状态
else if(app_rdy && app_wdf_rdy)begin //写条件满足
app_wdf_data <= app_wdf_data + 1; //写数据自加
wr_addr_cnt <= wr_addr_cnt + 1; //写地址自加
app_addr <= app_addr + 8; //DDR4地址加8
end
else begin //写条件不满足，保持当前值
app_wdf_data <= app_wdf_data;
wr_addr_cnt <= wr_addr_cnt;
app_addr <= app_addr;
end
end
WAIT:begin
state <= READ; //下一个时钟，跳到读状态
rd_addr_cnt <= 24'd0; //读地址复位
app_addr <= 28'd0; //DDR4读从地址0开始
end
READ:begin //读到设定的地址长度
if(rd_addr_cnt == TEST_LENGTH - 1 && app_rdy)
state <= IDLE; //则跳到空闲状态
else if(app_rdy)begin //若MIG已经准备好,则开始读
rd_addr_cnt <= rd_addr_cnt + 1'd1; //用户地址每次加一
app_addr <= app_addr + 8; //DDR4地址加8
end
else begin //若MIG没准备好,则保持原值
rd_addr_cnt <= rd_addr_cnt;
app_addr <= app_addr;
end
end
default:begin
state <= IDLE;
app_wdf_data <= 128'd0;
wr_addr_cnt <= 24'd0;
rd_addr_cnt <= 24'd0;
app_addr <= 28'd0;
end
endcase
end
end
//对DDR4实际读数据个数编号计数
always @(posedge ui_clk or negedge rst_n) begin
if(~rst_n)
rd_cnt <= 0; //若计数到读写长度，且读有效，地址计数器则置0
else if(app_rd_data_valid && rd_cnt == TEST_LENGTH - 1)
rd_cnt <= 0; //其他条件只要读有效，每个时钟自增1
else if (app_rd_data_valid )
rd_cnt <= rd_cnt + 1;
end
//寄存状态标志位
always @(posedge ui_clk or negedge rst_n) begin
if(~rst_n)
error_flag <= 0;
else if(error)
error_flag <= 1;
else
error_flag <= 0;
end
//led指示效果控制
always @(posedge ui_clk or negedge rst_n) begin
if((~rst_n) || (~init_calib_complete )) begin
led_cnt <= 25'd0;
led <= 1'b0;
end
else begin
if(~error_flag) //读写测试正确
led <= 1'b1; //led灯常亮
else begin //读写测试错误
led_cnt <= led_cnt + 25'd1;
if(led_cnt == L_TIME - 1'b1) begin
led_cnt <= 25'd0;
led <= ~led; //led灯闪烁
end
end
end
end
ila_0 ila_0_inst (
.clk(ui_clk), // input wire clk
.probe0(app_rd_data_valid), // input wire [0:0] probe0
.probe1(app_rd_data), // input wire [127:0] probe1
.probe2(app_addr), // input wire [27:0] probe2
.probe3(app_cmd), // input wire [2:0] probe3
.probe4(app_wdf_data), // input wire [127:0] probe4
.probe5(state), // input wire [1:0] probe5
.probe6(rd_addr_cnt), // input wire [23:0] probe6
.probe7(wr_addr_cnt), // input wire [23:0] probe7
.probe8(rd_cnt), // input wire [20:0] probe8
.probe9(error_flag), // input wire [0:0] probe9
.probe10(led), // input wire [0:0] probe10
.probe11(ui_clk_sync_rst), // input wire [0:0] probe11
.probe12(init_calib_complete), // input wire [0:0] probe12
.probe13(app_rdy), // input wire [0:0] probe13
.probe14(app_wdf_rdy), // input wire [0:0] probe14
.probe15(app_wdf_end), // input wire [0:0] probe15
.probe16(app_en), // input wire [0:0] probe16
.probe17(app_wdf_wren), // input wire [0:0] probe17
.probe18(error) // input wire [0:0] probe18
);
endmodule
top.xdc内容
set_property PACKAGE_PIN L14 [get_ports led]
set_property PACKAGE_PIN T3 [get_ports sys_rst_n]
set_property IOSTANDARD LVCMOS33 [get_ports sys_rst_n]
set_property PACKAGE_PIN AK1 [get_ports {c0_ddr4_adr[16]}]
set_property PACKAGE_PIN AH6 [get_ports {c0_ddr4_adr[6]}]
set_property PACKAGE_PIN AG3 [get_ports {c0_ddr4_adr[11]}]
set_property PACKAGE_PIN AK2 [get_ports {c0_ddr4_adr[12]}]
set_property PACKAGE_PIN AJ3 [get_ports {c0_ddr4_adr[10]}]
set_property PACKAGE_PIN AG2 [get_ports {c0_ddr4_adr[2]}]
set_property PACKAGE_PIN AH2 [get_ports {c0_ddr4_adr[4]}]
set_property PACKAGE_PIN AP3 [get_ports {c0_ddr4_adr[0]}]
set_property PACKAGE_PIN AP4 [get_ports {c0_ddr4_adr[8]}]
set_property PACKAGE_PIN AN4 [get_ports {c0_ddr4_adr[3]}]
set_property PACKAGE_PIN AN5 [get_ports {c0_ddr4_adr[7]}]
set_property PACKAGE_PIN AP2 [get_ports {c0_ddr4_adr[15]}]
set_property PACKAGE_PIN AN2 [get_ports {c0_ddr4_adr[14]}]
set_property PACKAGE_PIN AM2 [get_ports {c0_ddr4_adr[9]}]
set_property PACKAGE_PIN AM3 [get_ports {c0_ddr4_adr[13]}]
set_property PACKAGE_PIN AH7 [get_ports {c0_ddr4_adr[5]}]
set_property PACKAGE_PIN AG1 [get_ports {c0_ddr4_adr[1]}]
set_property PACKAGE_PIN AH1 [get_ports {c0_ddr4_ba[1]}]
set_property PACKAGE_PIN AM4 [get_ports {c0_ddr4_ba[0]}]
set_property PACKAGE_PIN AJ2 [get_ports {c0_ddr4_bg[1]}]
set_property PACKAGE_PIN AL4 [get_ports {c0_ddr4_bg[0]}]
set_property PACKAGE_PIN AK6 [get_ports {c0_ddr4_ck_t[0]}]
set_property PACKAGE_PIN AL1 [get_ports {c0_ddr4_cke[0]}]
set_property PACKAGE_PIN AL6 [get_ports {c0_ddr4_cs_n[0]}]
set_property PACKAGE_PIN C5 [get_ports {c0_ddr4_dm_dbi_n[7]}]
set_property PACKAGE_PIN F6 [get_ports {c0_ddr4_dm_dbi_n[6]}]
set_property PACKAGE_PIN J5 [get_ports {c0_ddr4_dm_dbi_n[5]}]
set_property PACKAGE_PIN M7 [get_ports {c0_ddr4_dm_dbi_n[4]}]
set_property PACKAGE_PIN AA3 [get_ports {c0_ddr4_dm_dbi_n[3]}]
set_property PACKAGE_PIN AA6 [get_ports {c0_ddr4_dm_dbi_n[2]}]
set_property PACKAGE_PIN AD8 [get_ports {c0_ddr4_dm_dbi_n[1]}]
set_property PACKAGE_PIN AE1 [get_ports {c0_ddr4_dm_dbi_n[0]}]
set_property PACKAGE_PIN A9 [get_ports {c0_ddr4_dq[63]}]
set_property PACKAGE_PIN B4 [get_ports {c0_ddr4_dq[62]}]
set_property PACKAGE_PIN B9 [get_ports {c0_ddr4_dq[61]}]
set_property PACKAGE_PIN A6 [get_ports {c0_ddr4_dq[60]}]
set_property PACKAGE_PIN A8 [get_ports {c0_ddr4_dq[59]}]
set_property PACKAGE_PIN A5 [get_ports {c0_ddr4_dq[58]}]
set_property PACKAGE_PIN B8 [get_ports {c0_ddr4_dq[57]}]
set_property PACKAGE_PIN A4 [get_ports {c0_ddr4_dq[56]}]
set_property PACKAGE_PIN E5 [get_ports {c0_ddr4_dq[55]}]
set_property PACKAGE_PIN E8 [get_ports {c0_ddr4_dq[54]}]
set_property PACKAGE_PIN F5 [get_ports {c0_ddr4_dq[53]}]
set_property PACKAGE_PIN D9 [get_ports {c0_ddr4_dq[52]}]
set_property PACKAGE_PIN E7 [get_ports {c0_ddr4_dq[51]}]
set_property PACKAGE_PIN C6 [get_ports {c0_ddr4_dq[50]}]
set_property PACKAGE_PIN C7 [get_ports {c0_ddr4_dq[49]}]
set_property PACKAGE_PIN C9 [get_ports {c0_ddr4_dq[48]}]
set_property PACKAGE_PIN F8 [get_ports {c0_ddr4_dq[47]}]
set_property PACKAGE_PIN J7 [get_ports {c0_ddr4_dq[46]}]
set_property PACKAGE_PIN G8 [get_ports {c0_ddr4_dq[45]}]
set_property PACKAGE_PIN H9 [get_ports {c0_ddr4_dq[44]}]
set_property PACKAGE_PIN G6 [get_ports {c0_ddr4_dq[43]}]
set_property PACKAGE_PIN G7 [get_ports {c0_ddr4_dq[42]}]
set_property PACKAGE_PIN G9 [get_ports {c0_ddr4_dq[41]}]
set_property PACKAGE_PIN J8 [get_ports {c0_ddr4_dq[40]}]
set_property PACKAGE_PIN L6 [get_ports {c0_ddr4_dq[39]}]
set_property PACKAGE_PIN K6 [get_ports {c0_ddr4_dq[38]}]
set_property PACKAGE_PIN M8 [get_ports {c0_ddr4_dq[37]}]
set_property PACKAGE_PIN J10 [get_ports {c0_ddr4_dq[36]}]
set_property PACKAGE_PIN L8 [get_ports {c0_ddr4_dq[35]}]
set_property PACKAGE_PIN J9 [get_ports {c0_ddr4_dq[34]}]
set_property PACKAGE_PIN L10 [get_ports {c0_ddr4_dq[33]}]
set_property PACKAGE_PIN K10 [get_ports {c0_ddr4_dq[32]}]
set_property PACKAGE_PIN V1 [get_ports {c0_ddr4_dq[31]}]
set_property PACKAGE_PIN AB1 [get_ports {c0_ddr4_dq[30]}]
set_property PACKAGE_PIN W3 [get_ports {c0_ddr4_dq[29]}]
set_property PACKAGE_PIN AB2 [get_ports {c0_ddr4_dq[28]}]
set_property PACKAGE_PIN W2 [get_ports {c0_ddr4_dq[27]}]
set_property PACKAGE_PIN Y1 [get_ports {c0_ddr4_dq[26]}]
set_property PACKAGE_PIN V2 [get_ports {c0_ddr4_dq[25]}]
set_property PACKAGE_PIN AA1 [get_ports {c0_ddr4_dq[24]}]
set_property PACKAGE_PIN Y5 [get_ports {c0_ddr4_dq[23]}]
set_property PACKAGE_PIN W7 [get_ports {c0_ddr4_dq[22]}]
set_property PACKAGE_PIN Y7 [get_ports {c0_ddr4_dq[21]}]
set_property PACKAGE_PIN W9 [get_ports {c0_ddr4_dq[20]}]
set_property PACKAGE_PIN Y6 [get_ports {c0_ddr4_dq[19]}]
set_property PACKAGE_PIN W5 [get_ports {c0_ddr4_dq[18]}]
set_property PACKAGE_PIN W4 [get_ports {c0_ddr4_dq[17]}]
set_property PACKAGE_PIN W8 [get_ports {c0_ddr4_dq[16]}]
set_property PACKAGE_PIN AB6 [get_ports {c0_ddr4_dq[15]}]
set_property PACKAGE_PIN AC6 [get_ports {c0_ddr4_dq[14]}]
set_property PACKAGE_PIN AD9 [get_ports {c0_ddr4_dq[13]}]
set_property PACKAGE_PIN AB7 [get_ports {c0_ddr4_dq[12]}]
set_property PACKAGE_PIN AB4 [get_ports {c0_ddr4_dq[11]}]
set_property PACKAGE_PIN AC7 [get_ports {c0_ddr4_dq[10]}]
set_property PACKAGE_PIN AA4 [get_ports {c0_ddr4_dq[9]}]
set_property PACKAGE_PIN AC9 [get_ports {c0_ddr4_dq[8]}]
set_property PACKAGE_PIN AE5 [get_ports {c0_ddr4_dq[7]}]
set_property PACKAGE_PIN AC1 [get_ports {c0_ddr4_dq[6]}]
set_property PACKAGE_PIN AD5 [get_ports {c0_ddr4_dq[5]}]
set_property PACKAGE_PIN AC4 [get_ports {c0_ddr4_dq[4]}]
set_property PACKAGE_PIN AD4 [get_ports {c0_ddr4_dq[3]}]
set_property PACKAGE_PIN AD2 [get_ports {c0_ddr4_dq[2]}]
set_property PACKAGE_PIN AE2 [get_ports {c0_ddr4_dq[1]}]
set_property PACKAGE_PIN AC2 [get_ports {c0_ddr4_dq[0]}]
set_property PACKAGE_PIN Y3 [get_ports {c0_ddr4_dqs_t[3]}]
set_property PACKAGE_PIN Y8 [get_ports {c0_ddr4_dqs_t[2]}]
set_property PACKAGE_PIN AB9 [get_ports {c0_ddr4_dqs_t[1]}]
set_property PACKAGE_PIN AD3 [get_ports {c0_ddr4_dqs_t[0]}]
set_property PACKAGE_PIN B7 [get_ports {c0_ddr4_dqs_t[7]}]
set_property PACKAGE_PIN D8 [get_ports {c0_ddr4_dqs_t[6]}]
set_property PACKAGE_PIN H7 [get_ports {c0_ddr4_dqs_t[5]}]
set_property PACKAGE_PIN K8 [get_ports {c0_ddr4_dqs_t[4]}]
set_property PACKAGE_PIN AL3 [get_ports {c0_ddr4_odt[0]}]
set_property PACKAGE_PIN AJ7 [get_ports c0_ddr4_act_n]
set_property PACKAGE_PIN AK3 [get_ports c0_ddr4_reset_n]
set_property PACKAGE_PIN G12 [get_ports c0_sys_clk_p]
set_property IOSTANDARD SSTL12_DCI [get_ports {c0_ddr4_cke[0]}]
####################################################################################
# Constraints from file : 'bd_9054_microblaze_I_0.xdc'
####################################################################################
current_instance u_ddr4_0/inst
set_property LOC MMCM_X0Y2 [get_cells -hier -filter {NAME =~ */u_ddr4_infrastructure/gen_mmcme*.u_mmcme_adv_inst}]
set_property CLOCK_DEDICATED_ROUTE BACKBONE [get_pins -hier -filter {NAME =~ */u_ddr4_infrastructure/gen_mmcme*.u_mmcme_adv_inst/CLKIN1}]
current_instance -quiet
set_property INTERNAL_VREF 0.84 [get_iobanks 67]
set_property INTERNAL_VREF 0.84 [get_iobanks 66]
set_property INTERNAL_VREF 0.84 [get_iobanks 65]
set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
set_property IOSTANDARD LVCMOS18 [get_ports led]
set_property C_CLK_INPUT_FREQ_HZ 300000000 [get_debug_cores dbg_hub]
set_property C_ENABLE_CLK_DIVIDER false [get_debug_cores dbg_hub]
set_property C_USER_SCAN_CHAIN 1 [get_debug_cores dbg_hub]
connect_debug_port dbg_hub/clk [get_nets clk]
约束文件无需手动填入约束代码，在执行Open Implemented Design后， 在I/O Ports中填入引脚位置和电平约束，Ctrl+S后自动保存到xdc中。
以上代码经过上板测试通过。
本文完。
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