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coredevice/analyzer: set VCD timescale

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This commit is contained in:
Sebastien Bourdeauducq 2015-12-20 22:06:07 +08:00
parent 4b5c10b641
commit b96e0d241e
1 changed files with 27 additions and 8 deletions
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35
artiq/coredevice/analyzer.py
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@ -3,11 +3,8 @@ from collections import namedtuple
from itertools import count
from enum import Enum
import struct
import importlib
import logging
from artiq.coredevice import ttl
logger = logging.getLogger(__name__)
@ -110,6 +107,9 @@ class VCDManager:
self.codes = vcd_codes()
self.current_time = None
def set_timescale_ns(self, timescale):
self.out.write("$timescale {}ns $end\n".format(timescale))
def get_channel(self, name, width):
code = next(self.codes)
self.out.write("$var wire {width} {code} {name} $end\n"
@ -145,13 +145,25 @@ class TTLHandler:
self.channel_value.set_value("X")
def get_timescale(devices):
timescale = None
for desc in devices.values():
if isinstance(desc, dict) and desc["type"] == "local":
if (desc["module"] == "artiq.coredevice.core"
and desc["class"] == "Core"):
if timescale is None:
timescale = desc["arguments"]["ref_period"]*1e9
else:
return None # more than one core device found
return timescale
def create_channel_handlers(vcd_manager, devices):
channel_handlers = dict()
for name, desc in sorted(devices.items(), key=itemgetter(0)):
if isinstance(desc, dict) and desc["type"] == "local":
module = importlib.import_module(desc["module"])
device_class = getattr(module, desc["class"])
if device_class in {ttl.TTLOut, ttl.TTLInOut}:
if (desc["module"] == "artiq.coredevice.ttl"
and desc["class"] in {"TTLOut", "TTLInOut"}):
channel = desc["arguments"]["channel"]
channel_handlers[channel] = TTLHandler(vcd_manager, name)
return channel_handlers
@ -162,12 +174,19 @@ def get_message_time(message):
def messages_to_vcd(filename, devices, messages):
messages = [m for m in messages if get_message_time(m)] # TODO: remove this hack
messages = sorted(messages, key=get_message_time)
vcd_manager = VCDManager(filename)
try:
timescale = get_timescale(devices)
if timescale is not None:
vcd_manager.set_timescale_ns(timescale)
else:
logger.warning("unable to determine VCD timescale")
channel_handlers = create_channel_handlers(vcd_manager, devices)
vcd_manager.set_time(0)
messages = [m for m in messages if get_message_time(m)] # TODO: remove this hack
messages = sorted(messages, key=get_message_time)
if messages:
start_time = get_message_time(messages[0])
for message in messages: