#!/usr/bin/env python """ Copyright (c) 2018 Alex Forencich Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. """ from myhdl import * import os import axil module = 'axil_cdc' testbench = 'test_%s' % module srcs = [] srcs.append("../rtl/%s.v" % module) srcs.append("../rtl/axil_cdc_rd.v") srcs.append("../rtl/axil_cdc_wr.v") srcs.append("%s.v" % testbench) src = ' '.join(srcs) build_cmd = "iverilog -o %s.vvp %s" % (testbench, src) def bench(): # Parameters DATA_WIDTH = 32 ADDR_WIDTH = 32 STRB_WIDTH = (DATA_WIDTH/8) # Inputs s_clk = Signal(bool(0)) s_rst = Signal(bool(0)) m_clk = Signal(bool(0)) m_rst = Signal(bool(0)) current_test = Signal(intbv(0)[8:]) s_axil_awaddr = Signal(intbv(0)[ADDR_WIDTH:]) s_axil_awprot = Signal(intbv(0)[3:]) s_axil_awvalid = Signal(bool(0)) s_axil_wdata = Signal(intbv(0)[DATA_WIDTH:]) s_axil_wstrb = Signal(intbv(0)[STRB_WIDTH:]) s_axil_wvalid = Signal(bool(0)) s_axil_bready = Signal(bool(0)) s_axil_araddr = Signal(intbv(0)[ADDR_WIDTH:]) s_axil_arprot = Signal(intbv(0)[3:]) s_axil_arvalid = Signal(bool(0)) s_axil_rready = Signal(bool(0)) m_axil_awready = Signal(bool(0)) m_axil_wready = Signal(bool(0)) m_axil_bresp = Signal(intbv(0)[2:]) m_axil_bvalid = Signal(bool(0)) m_axil_arready = Signal(bool(0)) m_axil_rdata = Signal(intbv(0)[DATA_WIDTH:]) m_axil_rresp = Signal(intbv(0)[2:]) m_axil_rvalid = Signal(bool(0)) # Outputs s_axil_awready = Signal(bool(0)) s_axil_wready = Signal(bool(0)) s_axil_bresp = Signal(intbv(0)[2:]) s_axil_bvalid = Signal(bool(0)) s_axil_arready = Signal(bool(0)) s_axil_rdata = Signal(intbv(0)[DATA_WIDTH:]) s_axil_rresp = Signal(intbv(0)[2:]) s_axil_rvalid = Signal(bool(0)) m_axil_awaddr = Signal(intbv(0)[ADDR_WIDTH:]) m_axil_awprot = Signal(intbv(0)[3:]) m_axil_awvalid = Signal(bool(0)) m_axil_wdata = Signal(intbv(0)[DATA_WIDTH:]) m_axil_wstrb = Signal(intbv(0)[STRB_WIDTH:]) m_axil_wvalid = Signal(bool(0)) m_axil_bready = Signal(bool(0)) m_axil_araddr = Signal(intbv(0)[ADDR_WIDTH:]) m_axil_arprot = Signal(intbv(0)[3:]) m_axil_arvalid = Signal(bool(0)) m_axil_rready = Signal(bool(0)) # AXIl4 master axil_master_inst = axil.AXILiteMaster() axil_master_pause = Signal(bool(False)) axil_master_logic = axil_master_inst.create_logic( s_clk, s_rst, m_axil_awaddr=s_axil_awaddr, m_axil_awprot=s_axil_awprot, m_axil_awvalid=s_axil_awvalid, m_axil_awready=s_axil_awready, m_axil_wdata=s_axil_wdata, m_axil_wstrb=s_axil_wstrb, m_axil_wvalid=s_axil_wvalid, m_axil_wready=s_axil_wready, m_axil_bresp=s_axil_bresp, m_axil_bvalid=s_axil_bvalid, m_axil_bready=s_axil_bready, m_axil_araddr=s_axil_araddr, m_axil_arprot=s_axil_arprot, m_axil_arvalid=s_axil_arvalid, m_axil_arready=s_axil_arready, m_axil_rdata=s_axil_rdata, m_axil_rresp=s_axil_rresp, m_axil_rvalid=s_axil_rvalid, m_axil_rready=s_axil_rready, pause=axil_master_pause, name='master' ) # AXIl4 RAM model axil_ram_inst = axil.AXILiteRam(2**16) axil_ram_pause = Signal(bool(False)) axil_ram_port0 = axil_ram_inst.create_port( m_clk, s_axil_awaddr=m_axil_awaddr, s_axil_awprot=m_axil_awprot, s_axil_awvalid=m_axil_awvalid, s_axil_awready=m_axil_awready, s_axil_wdata=m_axil_wdata, s_axil_wstrb=m_axil_wstrb, s_axil_wvalid=m_axil_wvalid, s_axil_wready=m_axil_wready, s_axil_bresp=m_axil_bresp, s_axil_bvalid=m_axil_bvalid, s_axil_bready=m_axil_bready, s_axil_araddr=m_axil_araddr, s_axil_arprot=m_axil_arprot, s_axil_arvalid=m_axil_arvalid, s_axil_arready=m_axil_arready, s_axil_rdata=m_axil_rdata, s_axil_rresp=m_axil_rresp, s_axil_rvalid=m_axil_rvalid, s_axil_rready=m_axil_rready, pause=axil_ram_pause, name='port0' ) # DUT if os.system(build_cmd): raise Exception("Error running build command") dut = Cosimulation( "vvp -m myhdl %s.vvp -lxt2" % testbench, s_clk=s_clk, s_rst=s_rst, m_clk=m_clk, m_rst=m_rst, current_test=current_test, s_axil_awaddr=s_axil_awaddr, s_axil_awprot=s_axil_awprot, s_axil_awvalid=s_axil_awvalid, s_axil_awready=s_axil_awready, s_axil_wdata=s_axil_wdata, s_axil_wstrb=s_axil_wstrb, s_axil_wvalid=s_axil_wvalid, s_axil_wready=s_axil_wready, s_axil_bresp=s_axil_bresp, s_axil_bvalid=s_axil_bvalid, s_axil_bready=s_axil_bready, s_axil_araddr=s_axil_araddr, s_axil_arprot=s_axil_arprot, s_axil_arvalid=s_axil_arvalid, s_axil_arready=s_axil_arready, s_axil_rdata=s_axil_rdata, s_axil_rresp=s_axil_rresp, s_axil_rvalid=s_axil_rvalid, s_axil_rready=s_axil_rready, m_axil_awaddr=m_axil_awaddr, m_axil_awprot=m_axil_awprot, m_axil_awvalid=m_axil_awvalid, m_axil_awready=m_axil_awready, m_axil_wdata=m_axil_wdata, m_axil_wstrb=m_axil_wstrb, m_axil_wvalid=m_axil_wvalid, m_axil_wready=m_axil_wready, m_axil_bresp=m_axil_bresp, m_axil_bvalid=m_axil_bvalid, m_axil_bready=m_axil_bready, m_axil_araddr=m_axil_araddr, m_axil_arprot=m_axil_arprot, m_axil_arvalid=m_axil_arvalid, m_axil_arready=m_axil_arready, m_axil_rdata=m_axil_rdata, m_axil_rresp=m_axil_rresp, m_axil_rvalid=m_axil_rvalid, m_axil_rready=m_axil_rready ) @always(delay(4)) def s_clkgen(): s_clk.next = not s_clk @always(delay(5)) def m_clkgen(): m_clk.next = not m_clk def wait_normal(): while not axil_master_inst.idle(): yield s_clk.posedge def wait_pause_master(): while not axil_master_inst.idle(): axil_master_pause.next = True yield s_clk.posedge yield s_clk.posedge yield s_clk.posedge axil_master_pause.next = False yield s_clk.posedge def wait_pause_slave(): while not axil_master_inst.idle(): axil_ram_pause.next = True yield s_clk.posedge yield s_clk.posedge yield s_clk.posedge axil_ram_pause.next = False yield s_clk.posedge @instance def check(): yield delay(100) yield s_clk.posedge s_rst.next = 1 m_rst.next = 1 yield s_clk.posedge s_rst.next = 0 m_rst.next = 0 yield s_clk.posedge yield delay(100) yield s_clk.posedge # testbench stimulus yield s_clk.posedge print("test 1: write") current_test.next = 1 addr = 4 test_data = b'\x11\x22\x33\x44' axil_master_inst.init_write(addr, test_data) yield axil_master_inst.wait() yield s_clk.posedge data = axil_ram_inst.read_mem(addr&0xffffff80, 32) for i in range(0, len(data), 16): print(" ".join(("{:02x}".format(c) for c in bytearray(data[i:i+16])))) assert axil_ram_inst.read_mem(addr, len(test_data)) == test_data yield delay(100) yield s_clk.posedge print("test 2: read") current_test.next = 2 addr = 4 test_data = b'\x11\x22\x33\x44' axil_ram_inst.write_mem(addr, test_data) axil_master_inst.init_read(addr, len(test_data)) yield axil_master_inst.wait() yield s_clk.posedge data = axil_master_inst.get_read_data() assert data[0] == addr assert data[1] == test_data yield delay(100) yield s_clk.posedge print("test 3: various writes") current_test.next = 3 for length in range(1,8): for offset in range(4,8): for wait in wait_normal, wait_pause_master, wait_pause_slave: print("length %d, offset %d"% (length, offset)) addr = 256*(16*offset+length)+offset test_data = bytearray([x%256 for x in range(length)]) axil_ram_inst.write_mem(addr&0xffffff80, b'\xAA'*(length+256)) axil_master_inst.init_write(addr, test_data) yield wait() yield s_clk.posedge data = axil_ram_inst.read_mem(addr&0xffffff80, 32) for i in range(0, len(data), 16): print(" ".join(("{:02x}".format(c) for c in bytearray(data[i:i+16])))) assert axil_ram_inst.read_mem(addr, length) == test_data assert axil_ram_inst.read_mem(addr-1, 1) == b'\xAA' assert axil_ram_inst.read_mem(addr+length, 1) == b'\xAA' yield delay(100) yield s_clk.posedge print("test 4: various reads") current_test.next = 4 for length in range(1,8): for offset in range(4,8): for wait in wait_normal, wait_pause_master, wait_pause_slave: print("length %d, offset %d"% (length, offset)) addr = 256*(16*offset+length)+offset test_data = bytearray([x%256 for x in range(length)]) axil_ram_inst.write_mem(addr, test_data) axil_master_inst.init_read(addr, length) yield wait() yield s_clk.posedge data = axil_master_inst.get_read_data() assert data[0] == addr assert data[1] == test_data yield delay(100) raise StopSimulation return instances() def test_bench(): sim = Simulation(bench()) sim.run() if __name__ == '__main__': print("Running test...") test_bench()