initial version for this project

Author: zhuzhzh

README.md

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+# C TBA
+
+##Author
+[Harris Zhu]([email protected])
+
+## Purpose
+use this demo to show how to communicate with C realtime.
+
+## Keys
+### get config data from C
+### support any memory width

clkgen.sv

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+//
+// Created by         : Harris Zhu
+// Filename           : clkgen.sv
+// Author             : Harris Zhu
+// Created On         : 2016-11-15 20:36
+// Last Modified      : 
+// Update Count       : 2016-11-15 20:36
+// Tags               :  
+// Description        : 
+// Conclusion         : 
+//                      
+//=======================================================================
+
+module clkgen;
+
+reg clk0=0;
+reg clk1=0;
+reg clk2=0;
+
+always #1 clk0 = ~clk0;
+always #2 clk1 = ~clk1;
+always #3 clk2 = ~clk2;
+
+initial
+begin
+	force hw_top.u_dut.clk0 = clk0;
+	force hw_top.u_dut.clk1 = clk1;
+	force hw_top.u_dut.clk2 = clk2;
+end
+
+endmodule
+

config.txt

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+0x0000ffff
+0x0000fff0
+0x0000ff00
+0x0000f000
+0x00000000

dut.f

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+clkgen.sv
+dut.v
+hw_top.sv
+memBFM.sv
+dutmem0.v
+dutmem1.v
+dutmem2.v

dut.v

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+//
+// Created by         : Harris Zhu
+// Filename           : dut.v
+// Author             : Harris Zhu
+// Created On         : 2016-11-15 20:38
+// Last Modified      : 
+// Update Count       : 2016-11-15 20:38
+// Tags               :  
+// Description        : 
+// Conclusion         : 
+//                      
+//=======================================================================
+
+module dut;
+
+parameter DWIDTH0 = 32;
+parameter DWIDTH1 = 16;
+parameter DWIDTH2 = 64;
+
+parameter AWIDTH0 = 10;
+parameter AWIDTH1 = 14;
+parameter AWIDTH2 = 16;
+
+
+reg [AWIDTH0-1:0] addr0;
+reg [AWIDTH1-1:0] addr1;
+reg [AWIDTH2-1:0] addr2;
+
+wire [DWIDTH0-1:0] dout0;
+wire [DWIDTH1-1:0] dout1;
+wire [DWIDTH2-1:0] dout2;
+
+reg [DWIDTH0-1:0] din0;
+reg [DWIDTH1-1:0] din1;
+reg [DWIDTH2-1:0] din2;
+
+wire clk0;
+wire clk1;
+wire clk2;
+
+reg rstn=0;
+
+reg ce0=1;
+reg ce1=1;
+reg ce2=1;
+
+reg we0=0;
+reg we1=0;
+reg we2=0;
+
+reg [31:0] cnt0=0;
+reg [27:0] cnt1=0;
+reg [15:0] cnt2=0;
+
+dutmem0 #(DWIDTH0, AWIDTH0) u_mem0(clk0, rstn, ce0, we0, addr0, din0, dout0);
+dutmem1 #(DWIDTH1, AWIDTH1) u_mem1(clk1, rstn, ce1, we1, addr1, din1, dout1);
+dutmem2 #(DWIDTH2, AWIDTH2) u_mem2(clk2, rstn, ce2, we2, addr2, din2, dout2);
+
+initial
+begin
+	#10;
+	rstn=1;
+end
+
+always @(posedge clk0)
+begin
+	cnt0 <= cnt0 + 1;
+	if(cnt0 % 17 == 0)
+	begin
+		we0 <= 1;
+	end else if(cnt0 % 33 == 0)
+	begin
+		we0 <= 0;
+	end
+end
+
+
+always @(posedge clk1)
+begin
+	cnt1 <= cnt1 + 1;
+	if(cnt1 % 19 == 0)
+	begin
+		we1 <= 1;
+	end else if(cnt1 % 37 == 0)
+	begin
+		we1 <= 0;
+	end
+end
+
+
+always @(posedge clk2)
+begin
+	cnt2 <= cnt2 + 1;
+	if(cnt2 % 23 == 0)
+	begin
+		we2 <= 1;
+	end else if(cnt2 % 47 == 0)
+	begin
+		we2 <= 0;
+	end
+end
+
+endmodule

dutmem0.v

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+//
+// Created by         : Harris Zhu
+// Filename           : dutmem0.v
+// Author             : Harris Zhu
+// Created On         : 2016-11-15 23:37
+// Last Modified      : 
+// Update Count       : 2016-11-15 23:37
+// Tags               :  
+// Description        : 
+// Conclusion         : 
+//                      
+//=======================================================================
+
+module dutmem0(clk, rstn, ce, we, addr, din, dout);
+parameter DWIDTH = 32;
+parameter AWIDTH = 10;
+parameter DEPTH = (1<<AWIDTH);
+
+input clk, rstn;
+input ce, we;
+
+input [AWIDTH-1:0] addr;
+input [DWIDTH-1:0] din;
+output [DWIDTH-1:0] dout;
+
+reg [DWIDTH-1:0] do_r;
+
+reg [DWIDTH-1:0] mem [0:DEPTH-1];
+
+always @(posedge clk)
+begin
+	if(ce && we)
+	begin
+		mem[addr] <= din;
+	end
+end
+
+always @(posedge clk)
+begin
+	if(ce && !we)
+	begin
+		do_r <= mem[addr];
+	end
+end
+
+assign dout = do_r;
+
+endmodule

dutmem1.v

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+//
+// Created by         : Harris Zhu
+// Filename           : dutmem0.v
+// Author             : Harris Zhu
+// Created On         : 2016-11-15 23:37
+// Last Modified      : 
+// Update Count       : 2016-11-15 23:37
+// Tags               :  
+// Description        : 
+// Conclusion         : 
+//                      
+//=======================================================================
+
+module dutmem1(clk, rstn, ce, we, addr, din, dout);
+parameter DWIDTH = 32;
+parameter AWIDTH = 10;
+parameter DEPTH = (1<<AWIDTH);
+
+input clk, rstn;
+input ce, we;
+
+input [AWIDTH-1:0] addr;
+input [DWIDTH-1:0] din;
+output [DWIDTH-1:0] dout;
+
+reg [DWIDTH-1:0] do_r;
+
+reg [DWIDTH-1:0] mem [0:DEPTH-1];
+
+always @(posedge clk)
+begin
+	if(ce && we)
+	begin
+		mem[addr] <= din;
+	end
+end
+
+always @(posedge clk)
+begin
+	if(ce && !we)
+	begin
+		do_r <= mem[addr];
+	end
+end
+
+assign dout = do_r;
+
+endmodule

dutmem2.v

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+//
+// Created by         : Harris Zhu
+// Filename           : dutmem0.v
+// Author             : Harris Zhu
+// Created On         : 2016-11-15 23:37
+// Last Modified      : 
+// Update Count       : 2016-11-15 23:37
+// Tags               :  
+// Description        : 
+// Conclusion         : 
+//                      
+//=======================================================================
+
+module dutmem2(clk, rstn, ce, we, addr, din, dout);
+parameter DWIDTH = 32;
+parameter AWIDTH = 10;
+parameter DEPTH = (1<<AWIDTH);
+
+input clk, rstn;
+input ce, we;
+
+input [AWIDTH-1:0] addr;
+input [DWIDTH-1:0] din;
+output [DWIDTH-1:0] dout;
+
+reg [DWIDTH-1:0] do_r;
+
+reg [DWIDTH-1:0] mem [0:DEPTH-1];
+
+always @(posedge clk)
+begin
+	if(ce && we)
+	begin
+		mem[addr] <= din;
+	end
+end
+
+always @(posedge clk)
+begin
+	if(ce && !we)
+	begin
+		do_r <= mem[addr];
+	end
+end
+
+assign dout = do_r;
+
+endmodule

hw_top.sv

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+//
+// Created by         : Harris Zhu
+// Filename           : hw_top.sv
+// Author             : Harris Zhu
+// Created On         : 2016-11-15 20:35
+// Last Modified      : 
+// Update Count       : 2016-11-15 20:35
+// Tags               :  
+// Description        : 
+// Conclusion         : 
+//                      
+//=======================================================================
+
+module hw_top;
+
+memBFM u_membfm();
+dut u_dut();
+
+clkgen u_clkgen();
+
+endmodule

libdpi.c

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+#include <stdio.h>
+#include <svdpi.h>
+
+void getMem(int addr, int* data);
+
+int getConfig(int * addrArray, char* addrLen) {
+	FILE* fh;
+	int a;
+	int anum=0;
+	fh = fopen("config.txt", "r");
+	if(fh==NULL) {
+		printf("cannot open file config.txt!\n");
+		exit(1);
+	}
+	while((fscanf(fh, "%x", &a)==1) && (anum<=64)) {
+		addrArray[anum] = a;
+		anum++;
+	}
+	*addrLen = anum;
+	fclose(fh);
+	return anum;
+}
+
+void trekFunc0(int data) {
+	int dataArray[2];
+	getMem(0x0000ffff, dataArray);
+}
+
+void trekFunc1(int data) {
+	int dataArray[2];
+	getMem(0x0000fff0, dataArray);
+}
+
+void trekFunc2(int data) {
+	int dataArray[2];
+	getMem(0x0000ff00, dataArray);
+}
+
+void getMem(int addr, int* data) {
+	switch (addr)
+	{
+	case 0x0000ffff:
+		data[0] = 0;
+		data[0] = 1;
+		break;
+	case 0x0000fff0:
+		data[0] = 2;
+		data[0] = 3;
+		break;
+	case 0x0000ff00:
+		data[0] = 4;
+		data[0] = 5;
+		break;
+	default:
+		data[0] = 6;
+		data[0] = 7;
+		break;
+	}
+		
+}