forked from M-Labs/artiq
379 lines
14 KiB
Python
379 lines
14 KiB
Python
from operator import itemgetter
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from collections import namedtuple
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from itertools import count
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import struct
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import logging
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from artiq.protocols.analyzer import MessageType, ExceptionType
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logger = logging.getLogger(__name__)
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OutputMessage = namedtuple(
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"OutputMessage", "channel timestamp rtio_counter address data")
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InputMessage = namedtuple(
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"InputMessage", "channel timestamp rtio_counter data")
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ExceptionMessage = namedtuple(
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"ExceptionMessage", "channel rtio_counter exception_type")
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def decode_message(data):
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message_type_channel = struct.unpack(">I", data[28:32])[0]
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message_type = MessageType(message_type_channel & 0b11)
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channel = message_type_channel >> 2
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if message_type == MessageType.output:
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parts = struct.unpack(">QIQQ", data[:28])
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data, address, rtio_counter, timestamp = parts
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return OutputMessage(channel, timestamp, rtio_counter, address, data)
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elif message_type == MessageType.input:
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parts = struct.unpack(">QIQQ", data[:28])
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data, _, rtio_counter, timestamp = parts
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return InputMessage(channel, timestamp, rtio_counter, data)
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elif message_type == MessageType.exception:
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exception_type, rtio_counter = struct.unpack(">BQ", data[11:20])
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return ExceptionMessage(channel, rtio_counter,
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ExceptionType(exception_type))
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DecodedDump = namedtuple(
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"DecodedDump", "log_channel dds_channel dds_onehot_sel messages")
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def decode_dump(data):
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parts = struct.unpack(">IQbbbb", data[:16])
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(sent_bytes, total_byte_count,
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overflow_occured, log_channel, dds_channel, dds_onehot_sel) = parts
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if sent_bytes + 16 != len(data):
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raise ValueError("analyzer dump has incorrect length")
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if overflow_occured:
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logger.warning("analyzer FIFO overflow occured, "
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"some messages have been lost")
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if total_byte_count > sent_bytes:
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logger.info("analyzer ring buffer has wrapped %d times",
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total_byte_count//sent_bytes)
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position = 16
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messages = []
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for _ in range(sent_bytes//32):
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messages.append(decode_message(data[position:position+32]))
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position += 32
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return DecodedDump(log_channel,
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dds_channel, bool(dds_onehot_sel),
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messages)
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def vcd_codes():
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codechars = [chr(i) for i in range(33, 127)]
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for n in count():
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q, r = divmod(n, len(codechars))
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code = codechars[r]
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while q > 0:
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q, r = divmod(q, len(codechars))
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code = codechars[r] + code
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yield code
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class VCDChannel:
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def __init__(self, out, code):
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self.out = out
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self.code = code
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def set_value(self, value):
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if len(value) > 1:
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self.out.write("b" + value + " " + self.code + "\n")
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else:
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self.out.write(value + self.code + "\n")
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def set_value_double(self, x):
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integer_cast = struct.unpack(">Q", struct.pack(">d", x))[0]
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self.set_value("{:064b}".format(integer_cast))
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class VCDManager:
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def __init__(self, fileobj):
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self.out = fileobj
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self.codes = vcd_codes()
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self.current_time = None
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def set_timescale_ns(self, timescale):
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self.out.write("$timescale {}ns $end\n".format(timescale))
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def get_channel(self, name, width):
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code = next(self.codes)
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self.out.write("$var wire {width} {code} {name} $end\n"
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.format(name=name, code=code, width=width))
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return VCDChannel(self.out, code)
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def set_time(self, time):
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if time != self.current_time:
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self.out.write("#{}\n".format(time))
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self.current_time = time
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class TTLHandler:
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def __init__(self, vcd_manager, name):
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self.name = name
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self.channel_value = vcd_manager.get_channel("ttl/" + name, 1)
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self.last_value = "X"
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self.oe = True
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def process_message(self, message):
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if isinstance(message, OutputMessage):
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logger.debug("TTL write @%d %d to %d, name: %s",
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message.timestamp, message.data, message.address, self.name)
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if message.address == 0:
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self.last_value = str(message.data)
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if self.oe:
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self.channel_value.set_value(self.last_value)
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elif message.address == 1:
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self.oe = bool(message.data)
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if self.oe:
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self.channel_value.set_value(self.last_value)
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else:
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self.channel_value.set_value("X")
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elif isinstance(message, InputMessage):
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logger.debug("TTL read @%d %d, name: %s",
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message.timestamp, message.data, self.name)
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self.channel_value.set_value(str(message.data))
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class TTLClockGenHandler:
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def __init__(self, vcd_manager, name, ref_period):
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self.name = name
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self.ref_period = ref_period
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self.channel_frequency = vcd_manager.get_channel(
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"ttl_clkgen/" + name, 64)
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def process_message(self, message):
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if isinstance(message, OutputMessage):
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logger.debug("TTL_CLKGEN write @%d %d to %d, name: %s",
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message.timestamp, message.data, message.address, self.name)
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frequency = message.data/self.ref_period/2**24
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self.channel_frequency.set_value_double(frequency)
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class DDSHandler:
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def __init__(self, vcd_manager, dds_type, onehot_sel, sysclk):
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self.vcd_manager = vcd_manager
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self.dds_type = dds_type
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self.onehot_sel = onehot_sel
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self.sysclk = sysclk
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self.selected_dds_channels = set()
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self.dds_channels = dict()
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def add_dds_channel(self, name, dds_channel_nr):
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dds_channel = dict()
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dds_channel["vcd_frequency"] = \
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self.vcd_manager.get_channel("dds/" + name + "/frequency", 64)
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dds_channel["vcd_phase"] = \
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self.vcd_manager.get_channel("dds/" + name + "/phase", 64)
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if self.dds_type == "AD9858":
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dds_channel["ftw"] = [None, None, None, None]
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dds_channel["pow"] = [None, None]
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elif self.dds_type == "AD9914":
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dds_channel["ftw"] = [None, None]
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dds_channel["pow"] = None
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self.dds_channels[dds_channel_nr] = dds_channel
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def _gpio_to_channels(self, gpio):
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gpio >>= 1 # strip reset
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if self.onehot_sel:
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r = set()
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nr = 0
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mask = 1
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while gpio >= mask:
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if gpio & mask:
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r.add(nr)
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nr += 1
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mask *= 2
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return r
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else:
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return {gpio}
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def _decode_ad9858_write(self, message):
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if message.address == 0x41:
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self.selected_dds_channels = self._gpio_to_channels(message.data)
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for dds_channel_nr in self.selected_dds_channels:
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dds_channel = self.dds_channels[dds_channel_nr]
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if message.address in range(0x0a, 0x0e):
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dds_channel["ftw"][message.address - 0x0a] = message.data
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elif message.address in range(0x0e, 0x10):
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dds_channel["pow"][message.address - 0x0e] = message.data
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elif message.address == 0x40: # FUD
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if None not in dds_channel["ftw"]:
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ftw = sum(x << i*8
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for i, x in enumerate(dds_channel["ftw"]))
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frequency = ftw*self.sysclk/2**32
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dds_channel["vcd_frequency"].set_value_double(frequency)
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if None not in dds_channel["pow"]:
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pow = dds_channel["pow"][0] | (dds_channel["pow"][1] & 0x3f) << 8
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phase = pow/2**14
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dds_channel["vcd_phase"].set_value_double(phase)
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def _decode_ad9914_write(self, message):
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if message.address == 0x81:
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self.selected_dds_channels = self._gpio_to_channels(message.data)
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for dds_channel_nr in self.selected_dds_channels:
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dds_channel = self.dds_channels[dds_channel_nr]
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if message.address in range(0x2d, 0x2f):
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dds_channel["ftw"][message.address - 0x2d] = message.data
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elif message.address == 0x31:
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dds_channel["pow"] = message.data
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elif message.address == 0x80: # FUD
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if None not in dds_channel["ftw"]:
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ftw = sum(x << i*8
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for i, x in enumerate(dds_channel["ftw"]))
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frequency = ftw*self.sysclk/2**32
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dds_channel["vcd_frequency"].set_value_double(frequency)
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if dds_channel["pow"] is not None:
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phase = dds_channel["pow"]/2**16
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dds_channel["vcd_phase"].set_value_double(phase)
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def process_message(self, message):
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if isinstance(message, OutputMessage):
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logger.debug("DDS write @%d 0x%04x to 0x%02x, selected channels: %s",
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message.timestamp, message.data, message.address,
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self.selected_dds_channels)
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if self.dds_type == "AD9858":
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self._decode_ad9858_write(message)
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elif self.dds_type == "AD9914":
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self._decode_ad9914_write(message)
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def _extract_log_chars(data):
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r = ""
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for i in range(4):
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n = data >> 24
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data = (data << 8) & 0xffffffff
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if not n:
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return r
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r += chr(n)
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return r
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class LogHandler:
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def __init__(self, vcd_manager, vcd_log_channels):
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self.vcd_channels = dict()
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for name, maxlength in vcd_log_channels.items():
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self.vcd_channels[name] = vcd_manager.get_channel("log/" + name,
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maxlength*8)
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self.current_entry = ""
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def process_message(self, message):
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if isinstance(message, OutputMessage):
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message_payload = _extract_log_chars(message.data)
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self.current_entry += message_payload
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if len(message_payload) < 4:
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channel_name, log_message = \
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self.current_entry.split(":", maxsplit=1)
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vcd_value = ""
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for c in log_message:
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vcd_value += "{:08b}".format(ord(c))
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self.vcd_channels[channel_name].set_value(vcd_value)
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self.current_entry = ""
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def get_vcd_log_channels(log_channel, messages):
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vcd_log_channels = dict()
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log_entry = ""
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for message in messages:
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if (isinstance(message, OutputMessage)
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and message.channel == log_channel):
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message_payload = _extract_log_chars(message.data)
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log_entry += message_payload
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if len(message_payload) < 4:
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channel_name, log_message = log_entry.split("\x1E", maxsplit=1)
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l = len(log_message)
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if channel_name in vcd_log_channels:
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if vcd_log_channels[channel_name] < l:
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vcd_log_channels[channel_name] = l
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else:
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vcd_log_channels[channel_name] = l
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log_entry = ""
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return vcd_log_channels
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def get_ref_period(devices):
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ref_period = None
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for desc in devices.values():
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if isinstance(desc, dict) and desc["type"] == "local":
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if (desc["module"] == "artiq.coredevice.core"
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and desc["class"] == "Core"):
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if ref_period is None:
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ref_period = desc["arguments"]["ref_period"]
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else:
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return None # more than one core device found
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return ref_period
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def create_channel_handlers(vcd_manager, devices, ref_period,
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dds_channel, dds_onehot_sel):
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channel_handlers = dict()
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for name, desc in sorted(devices.items(), key=itemgetter(0)):
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if isinstance(desc, dict) and desc["type"] == "local":
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if (desc["module"] == "artiq.coredevice.ttl"
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and desc["class"] in {"TTLOut", "TTLInOut"}):
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channel = desc["arguments"]["channel"]
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channel_handlers[channel] = TTLHandler(vcd_manager, name)
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if (desc["module"] == "artiq.coredevice.ttl"
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and desc["class"] == "TTLClockGen"):
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channel = desc["arguments"]["channel"]
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channel_handlers[channel] = TTLClockGenHandler(vcd_manager, name, ref_period)
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if (desc["module"] == "artiq.coredevice.dds"
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and desc["class"] in {"AD9858", "AD9914"}):
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sysclk = desc["arguments"]["sysclk"]
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dds_channel_ddsbus = desc["arguments"]["channel"]
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if dds_channel in channel_handlers:
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dds_handler = channel_handlers[dds_channel]
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if dds_handler.dds_type != desc["class"]:
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raise ValueError("All DDS channels must have the same type")
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if dds_handler.sysclk != sysclk:
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raise ValueError("All DDS channels must have the same sysclk")
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else:
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dds_handler = DDSHandler(vcd_manager, desc["class"],
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dds_onehot_sel, sysclk)
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channel_handlers[dds_channel] = dds_handler
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dds_handler.add_dds_channel(name, dds_channel_ddsbus)
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return channel_handlers
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def get_message_time(message):
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return getattr(message, "timestamp", message.rtio_counter)
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def decoded_dump_to_vcd(fileobj, devices, dump):
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vcd_manager = VCDManager(fileobj)
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ref_period = get_ref_period(devices)
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if ref_period is not None:
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vcd_manager.set_timescale_ns(ref_period*1e9)
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else:
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logger.warning("unable to determine core device ref_period")
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ref_period = 1e-9 # guess
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messages = sorted(dump.messages, key=get_message_time)
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channel_handlers = create_channel_handlers(
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vcd_manager, devices, ref_period,
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dump.dds_channel, dump.dds_onehot_sel)
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vcd_log_channels = get_vcd_log_channels(dump.log_channel, messages)
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channel_handlers[dump.log_channel] = LogHandler(vcd_manager, vcd_log_channels)
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slack = vcd_manager.get_channel("rtio_slack", 64)
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vcd_manager.set_time(0)
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if messages:
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start_time = get_message_time(messages[0])
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for message in messages:
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if message.channel in channel_handlers:
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vcd_manager.set_time(
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get_message_time(message) - start_time)
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channel_handlers[message.channel].process_message(message)
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if isinstance(message, OutputMessage):
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slack.set_value_double(
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(message.timestamp - message.rtio_counter)*ref_period)
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