You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
4.0 KiB
125 lines
4.0 KiB
import logging
|
|
import cocotb
|
|
from cocotb.utils import get_sim_time
|
|
from cocotb.triggers import FallingEdge, RisingEdge, Timer
|
|
|
|
|
|
class Sram:
|
|
|
|
def __init__(self, clk, wen, ren, adr, din, dout, mem, *args, **kwargs):
|
|
self._version = "0.0.1"
|
|
|
|
self.log = logging.getLogger(f"cocotb.{clk._path}")
|
|
|
|
self._clk = clk
|
|
self._wen = wen
|
|
self._ren = ren
|
|
self._adr = adr
|
|
self._din = din
|
|
self._dout = dout
|
|
self._mem = mem
|
|
|
|
self._clkedge = RisingEdge(self._clk)
|
|
|
|
|
|
class SramRead(Sram):
|
|
|
|
def __init__(self, clk, ren, adr, din, mem, *args, **kwargs):
|
|
super().__init__(clk, None, ren, adr, din, None, mem, *args, **kwargs)
|
|
|
|
self.log.info("SRAM read")
|
|
self.log.info(" cocotbext-sram version %s", self._version)
|
|
self.log.info(" Copyright (c) 2022 Torsten Meissner")
|
|
|
|
self._active = None
|
|
self._restart()
|
|
|
|
def _restart(self):
|
|
self.log.debug("SramRead._restart()")
|
|
if self._active is not None:
|
|
self._active.kill()
|
|
# Schedule SRAM read to run concurrently
|
|
self._active = cocotb.start_soon(self._read())
|
|
|
|
async def _read(self):
|
|
self.log.debug("SramRead._read()")
|
|
while True:
|
|
await self._clkedge
|
|
if self._ren.value == 1:
|
|
_data = self._mem[str(self._adr.value)]
|
|
self._din.value = _data
|
|
self.log.info(f"Read data: {hex(_data)} from adr: {hex(self._adr.value)}")
|
|
|
|
|
|
class SramWrite(Sram):
|
|
|
|
def __init__(self, clk, wen, adr, dout, mem, *args, **kwargs):
|
|
super().__init__(clk, wen, None, adr, None, dout, mem, *args, **kwargs)
|
|
|
|
self.log.info("SRAM write")
|
|
self.log.info(" cocotbext-sram version %s", self._version)
|
|
self.log.info(" Copyright (c) 2022 Torsten Meissner")
|
|
|
|
self._active = None
|
|
self._restart()
|
|
|
|
def _restart(self):
|
|
self.log.debug("SramWrite._restart()")
|
|
if self._active is not None:
|
|
self._active.kill()
|
|
# Schedule SRAM write to run concurrently
|
|
self._active = cocotb.start_soon(self._write())
|
|
|
|
async def _write(self):
|
|
self.log.debug("SramWrite._write()")
|
|
while True:
|
|
await self._clkedge
|
|
if self._wen.value == 1:
|
|
self._mem[str(self._adr.value)] = self._dout.value
|
|
self.log.info(f"Wrote data: {hex(self._dout.value)} to adr: {hex(self._adr.value)}")
|
|
|
|
|
|
class SramMonitor(Sram):
|
|
|
|
def __init__(self, clk, wen, ren, adr, din, dout, *args, **kwargs):
|
|
super().__init__(clk, wen, ren, adr, din, dout, None, *args, **kwargs)
|
|
|
|
self.log.info("SRAM monitor")
|
|
self.log.info(" cocotbext-sram version %s", self._version)
|
|
self.log.info(" Copyright (c) 2022 Torsten Meissner")
|
|
|
|
self._active = None
|
|
self._transactions = {}
|
|
self._restart()
|
|
|
|
def _restart(self):
|
|
self.log.debug("SramMonitor._restart()")
|
|
if self._active is not None:
|
|
self._active.kill()
|
|
# Schedule SRAM read to run concurrently
|
|
self._active = cocotb.start_soon(self._read())
|
|
|
|
async def _read(self):
|
|
self.log.debug("SramMonitor._read()")
|
|
while True:
|
|
await self._clkedge
|
|
if self._wen.value:
|
|
self._transactions[str(get_sim_time('ns'))] = {
|
|
"type" : "write",
|
|
"adr" : self._adr.value,
|
|
"data" : self._dout.value}
|
|
elif self._ren.value:
|
|
_adr = self._adr.value
|
|
await self._clkedge
|
|
self._transactions[str(get_sim_time('ns'))] = {
|
|
"type" : "read",
|
|
"adr" : _adr,
|
|
"data" : self._din.value}
|
|
|
|
@property
|
|
def transactions(self, index=None):
|
|
if index:
|
|
key = list(self._transactions.keys())[index]
|
|
return {key: self._transactions[key]}
|
|
else:
|
|
return self._transactions
|