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import cocotb
from cocotb.clock import Clock
from cocotb.triggers import FallingEdge
from pyuvm import *
from pyuvm import utility_classes
class CocotbProxy:
def __init__(self, dut, label):
self.dut = dut
ConfigDB().set(None, "*", label, self)
self.driver_queue = UVMQueue(maxsize=1)
self.cmd_mon_queue = UVMQueue(maxsize=0)
self.result_mon_queue = UVMQueue(maxsize=0)
self.done = cocotb.triggers.Event(name="Done")
def send_op(self, aa, bb, op):
self.driver_queue.put((aa, bb, op))
def get_cmd(self):
return self.cmd_mon_queue.get()
def get_result(self):
return self.result_mon_queue.get()
async def reset(self):
await FallingEdge(self.dut.clk)
self.dut.reset_n = 0
self.dut.A = 0
self.dut.B = 0
self.dut.op = 0
await FallingEdge(self.dut.clk)
self.dut.reset_n = 1
await FallingEdge(self.dut.clk)
async def driver_bfm(self):
self.dut.start = self.dut.A = self.dut.B = 0
self.dut.op = 0
while True:
await FallingEdge(self.dut.clk)
if self.dut.start == 0 and self.dut.done == 0:
try:
(aa, bb, op) = self.driver_queue.get_nowait()
self.dut.A = aa
self.dut.B = bb
self.dut.op = op
self.dut.start = 1
except queue.Empty:
pass
elif self.dut.start == 1:
if self.dut.done.value == 1:
self.dut.start = 0
async def cmd_mon_bfm(self):
prev_start = 0
while True:
await FallingEdge(self.dut.clk)
try:
start = int(self.dut.start.value)
except ValueError:
start = 0
if start == 1 and prev_start == 0:
self.cmd_mon_queue.put_nowait(
(int(self.dut.A), int(self.dut.B), int(self.dut.op))
)
prev_start = start
async def result_mon_bfm(self):
prev_done = 0
while True:
await FallingEdge(self.dut.clk)
try:
done = int(self.dut.done)
except ValueError:
done = 0
if done == 1 and prev_done == 0:
self.result_mon_queue.put_nowait(int(self.dut.result.value))
prev_done = done
def run_uvm_test(test_name):
root = uvm_root()
root.run_test(test_name)
# noinspection PyArgumentList,PyAsyncCall
# @cocotb.test()
async def test_alu(dut):
clock = Clock(dut.clk, 2, "us")
cocotb.start_soon(clock.start())
proxy = CocotbProxy(dut, "PROXY")
await proxy.reset()
cocotb.start_soon(proxy.driver_bfm())
cocotb.start_soon(proxy.cmd_mon_bfm())
cocotb.start_soon(proxy.result_mon_bfm())
await FallingEdge(dut.clk)
test_thread = threading.Thread(
target=run_uvm_test, args=("CocotbAluTest",), name="run_test"
)
test_thread.start()
await proxy.done.wait()
await FallingEdge(dut.clk)
# noinspection PyArgumentList,PyAsyncCall
@cocotb.test()
async def test_queue(dut):
"Test basic QUEUE functions"
qq = utility_classes.UVMQueue(maxsize=1)
await qq.put(5)
got = await qq.get()
assert got == 5
await qq.put("x")
peeked = await qq.peek()
assert "x" == peeked
got = await qq.get()
qq.put_nowait(5)
got = qq.get_nowait()
assert got == 5
qq.put_nowait("x")
peeked = qq.peek_nowait()
assert "x" == peeked
got = qq.get_nowait()
assert got == peeked
async def delay_put(qq, delay, data):
for dd in data:
await qq.put(dd)
async def delay_get(qq, delay):
ret_dat = []
datum = await qq.get()
ret_dat.append(datum)
while datum is not None:
datum = await qq.get()
ret_dat.append(datum)
return ret_dat
async def delay_peek(qq, delay):
return await qq.peek()
@cocotb.test()
async def wait_on_queue(dut):
"""Test put and get with waits"""
clock = Clock(dut.clk, 2, "us") # make the simulator wait
cocotb.start_soon(clock.start())
qq = utility_classes.UVMQueue(maxsize=1)
send_data = [0.01, "two", 3, None]
cocotb.start_soon(delay_put(qq, 0.01, send_data))
got_data = await delay_peek(qq, 0.01)
assert got_data == 0.01
got_data = await delay_get(qq, 0.01)
@cocotb.test()
async def nowait_tests(dut):
"""Test the various nowait flavors"""
qq = utility_classes.UVMQueue(maxsize=1)
await qq.put(5)
try:
qq.put_nowait(6)
assert False
except cocotb.queue.QueueFull:
pass
try:
xx = qq.peek_nowait()
assert xx == 5
except cocotb.queue.QueueEmpty:
assert False
try:
xx = qq.get_nowait()
assert xx == 5
except cocotb.queue.QueueEmpty:
assert False
try:
xx = qq.peek_nowait()
assert False
except cocotb.queue.QueueEmpty:
pass
try:
xx = qq.get_nowait()
assert False
except cocotb.queue.QueueEmpty:
pass
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