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#!/usr/bin/env python3
import numpy as np
while True:
bram_width = 4 * np.random.randint(1, 9)
bram_depth = 256 * np.random.randint(1, 9)
numrports = np.random.randint(1, 5)
if bram_width * bram_depth * numrports < 16*4096: break
with open("demo.v", "wt") as f:
print("// bram_width = %d" % bram_width, file=f)
print("// bram_depth = %d" % bram_depth, file=f)
print("// numrports = %d" % numrports, file=f)
print("module demo (", file=f)
for i in range(numrports):
print(" input [%d:0] raddr%d," % (np.ceil(np.log2(bram_depth))-1, i), file=f)
print(" output reg [%d:0] rdata%d," % (bram_width-1, i), file=f)
print(" input [%d:0] waddr," % (np.ceil(np.log2(bram_depth))-1), file=f)
print(" input [%d:0] wdata," % (bram_width-1), file=f)
print(" input wen, clk", file=f)
print(");", file=f)
print(" reg [%d:0] memory [0:%d];" % (bram_width-1, bram_depth-1), file=f)
print(" initial $readmemh(\"demo_dat0.hex\", memory);", file=f)
for i in range(numrports):
print(" always @(posedge clk) rdata%d <= memory[raddr%d];" % (i, i), file=f)
print(" always @(posedge clk) if (wen) memory[waddr] <= wdata;", file=f)
print("endmodule", file=f)
with open("demo_tb.v", "wt") as f:
print("module demo_tb;", file=f)
print(" reg clk = 0;", file=f)
print(" always #5 clk = ~clk;", file=f)
print(" integer i, errcnt = 0;", file=f)
print(" reg [%d:0] addr;" % (np.ceil(np.log2(bram_depth))-1), file=f)
for i in range(numrports):
print(" wire [%d:0] rdata%d;" % (bram_width-1, i), file=f)
print(" reg [%d:0] refmem [0:%d];" % (bram_width-1, bram_depth-1), file=f)
print(" initial $readmemh(\"demo_dat1.hex\", refmem);", file=f)
print(" demo uut (", file=f)
for i in range(numrports):
print(" .raddr%d(addr+%d'd%d)," % (i, np.ceil(np.log2(bram_depth)), i), file=f)
print(" .rdata%d(rdata%d)," % (i, i), file=f)
print(" .wen(1'b0),", file=f)
print(" .clk(clk)", file=f)
print(" );", file=f)
print(" initial begin", file=f)
print(" repeat (10) @(negedge clk);", file=f)
print(" for (i = 0; i < %d; i = i + %d) begin" % (bram_depth, numrports), file=f)
print(" addr <= i;", file=f)
print(" @(posedge clk);", file=f)
print(" @(negedge clk);", file=f)
for i in range(numrports):
print(" if (i+%d < %d && refmem[i+%d] !== rdata%d) begin errcnt = errcnt+1; " % (i, bram_depth, i, i) +
"$display(\"ERROR @%%x: %%0%dx != %%0%dx\", i+%d, refmem[i+%d], rdata%d); end" % (bram_width/4, bram_width/4, i, i, i), file=f)
print(" end", file=f)
print(" if (errcnt == 0)", file=f)
print(" $display(\"All tests OK.\");", file=f)
print(" else", file=f)
print(" $display(\"Found %1d ERROR(s).\", errcnt);", file=f)
print(" $finish;", file=f)
print(" end", file=f)
print("endmodule", file=f)
with open("demo_dat0.hex", "wt") as f:
for i in range(bram_depth):
print("%0*x" % (bram_width//4, np.random.randint(1 << bram_width)), file=f)
with open("demo_dat1.hex", "wt") as f:
for i in range(bram_depth):
print("%0*x" % (bram_width//4, np.random.randint(1 << bram_width)), file=f)
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