How to import matlab data into modelsim simulation

1. 目的

   This method is mainly applicable to matlab和modelsimUseful for co-simulation,比如matlab生成的adc数据作为modelsim during simulationadcIncentive data,或者modelsim生成的ramData can also be loaded during simulationmodelsim进行仿真,下面我们将以matlab生成adc原始数据导入modelsim来演示.

2. matlab代码

   生成adc数据的代码：

clc;
clear all;
close all;

fs = 250e6;     % adc采样率
fout = 10e6;    % Generate signal frequency
len = 8192;     % Generate signal length
t = 0:1/fs:(len-1)/fs;  % The time slice of the sampling point
amp = 25000;    % adc信号幅度

adc_dat = cos(2*pi*fout*t); % adc数据
adc_dat = awgn(adc_dat, 40);% Add noise to the resulting signal

adc_dat = round(adc_dat*amp);% 量化adc数据

% Plot the time and frequency domains of the signal
subplot(211);
plot(adc_dat);
subplot(212);
fft_data = abs(fft(adc_dat, len));
fft_data = 20*log10(fft_data);
fft_data = fft_data - max(fft_data);
plot(fft_data);

% 存储ADC数据
u_adc_dat = sign2com(adc_dat, 16);
fp = fopen('adc_dat.bin', 'w');
fprintf(fp, '%04x\n',u_adc_dat);
fclose all;

adcFrequency and time domain plots of the data

3. verilog代码

`timescale 1ns/1ps

module testbench();

localparam					LEN	=	8192			;

reg		[15:0]				adc_dat[8191:0]			;
reg							clk						;
reg							rst						;
reg		[12:0]				cnt						;
reg		[15:0]				sim_dat					;

initial	begin
	$readmemh("./adc_dat.bin", adc_dat, 0, LEN-1);
end

initial	begin
	clk		= 0;
	rst		= 1;
	cnt		= 0;
	sim_dat	= 0;
	#1000;
	rst		= 0;
end

always	#2.00	clk	=	~clk						;

[email protected](posedge clk)
begin
	if(rst)	begin
		cnt <= 0;
	end
	else	begin
		cnt		<= cnt + 1;
		sim_dat	<= adc_dat[cnt];
	end
end

endmodule

4. 仿真效果

5. 总结
   This method works very wellmatlabThe generated data serves as a stimulus source.Replace the module that needs to generate the data source inside the module.