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4:修改sim_tb_top.v文件,把自己ddr读写的工程加入,替代原xilinx的example_top。即可仿真

5:原有例子仅仅可以仿真1024个内存空间,如果需要更多,需要修改如下地方:

parameter MEM_BITS         =     23+5;// 15; // Set this parameter to control how many write data bursts can be stored in memory.  The default is 2^10=1024.

6:原官方例子,在一段时间后会停止,是因为原例子仅仅是ddr init成功后读写几次后停止。如果需要仿真时间更多,需要修改这里。

7:ok。

关于仿真出现很多Warning,很简单,vlog -suppress 2083,这些烦人的Warning就没有了。

“# ** Warning: (vlog-2083) ../ddr.srcs/sources_1/ip/mig_7series_0/mig_7series_0/user_design/rtl/mig_7series_0_mig_sim.v(641): Carriage return (0x0D) is not followed by a newline (0x0A).

# ** Warning: (vlog-2083) ../ddr.srcs/sources_1/ip/mig_7series_0/mig_7series_0/user_design/rtl/mig_7series_0_mig_sim.v(641): Carriage return (0x0D) is not followed by a newline (0x0A).

# ** Warning: (vlog-2083) ../ddr.srcs/sources_1/ip/mig_7series_0/mig_7series_0/user_design/rtl/mig_7series_0_mig_sim.v(653): Carriage return (0x0D) is not followed by a newline (0x0A).

# ** Warning: (vlog-2083) ../ddr.srcs/sources_1/ip/mig_7series_0/mig_7series_0/user_design/rtl/mig_7series_0_mig_sim.v(653): Carriage return (0x0D) is not followed by a newline (0x0A).

# ** Warning: (vlog-2083) ../ddr.srcs/sources_1/ip/mig_7series_0/mig_7series_0/user_design/rtl/mig_7series_0_mig_sim.v(653): Carriage return (0x0D) is not followed by a newline (0x0A).

# ** Warning: (vlog-2083) ../ddr.srcs/sources_1/ip/mig_7series_0/mig_7series_0/user_design/rtl/mig_7series_0_mig_sim.v(667): Carriage return (0x0D) is not followed by a newline (0x0A).

# ** Warning: (vlog-2083) ../ddr.srcs/sources_1/ip/mig_7series_0/mig_7series_0/user_design/rtl/mig_7series_0_mig_sim.v(667): Carriage return (0x0D) is not followed by a newline (0x0A).

# ** Warning: (vlog-2083) ../ddr.srcs/sources_1/ip/mig_7series_0/mig_7series_0/user_design/rtl/mig_7series_0_mig_sim.v(667): Carriage return (0x0D) is not follow"

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