100 lines
2.9 KiB
Python
100 lines
2.9 KiB
Python
import random, copy
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from migen.fhdl.std import *
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from migen.genlib.record import *
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from migen.sim.generic import run_simulation
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from lib.sata.common import *
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from lib.sata.link import SATALink
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from lib.sata.test.hdd import *
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from lib.sata.test.common import *
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class LinkStreamer(Module):
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def __init__(self):
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self.source = Source(link_description(32))
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###
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self.packets = []
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self.packet = LinkTXPacket()
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self.packet.done = 1
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def send(self, packet, blocking=True):
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packet = copy.deepcopy(packet)
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self.packets.append(packet)
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if blocking:
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while packet.done == 0:
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yield
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def do_simulation(self, selfp):
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if len(self.packets) and self.packet.done:
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self.packet = self.packets.pop(0)
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if not self.packet.ongoing and not self.packet.done:
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selfp.source.stb = 1
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selfp.source.sop = 1
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selfp.source.d = self.packet.pop(0)
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self.packet.ongoing = True
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elif selfp.source.stb == 1 and selfp.source.ack == 1:
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selfp.source.sop = 0
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selfp.source.eop = (len(self.packet) == 1)
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if len(self.packet) > 0:
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selfp.source.stb = 1
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selfp.source.d = self.packet.pop(0)
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else:
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self.packet.done = 1
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selfp.source.stb = 0
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class LinkLogger(Module):
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def __init__(self):
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self.sink = Sink(link_description(32))
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###
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self.packet = LinkRXPacket()
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def receive(self):
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self.packet.done = 0
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while self.packet.done == 0:
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yield
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def do_simulation(self, selfp):
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selfp.sink.ack = 1
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if selfp.sink.stb == 1 and selfp.sink.sop == 1:
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self.packet = LinkRXPacket()
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self.packet.append(selfp.sink.d)
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elif selfp.sink.stb:
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self.packet.append(selfp.sink.d)
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if (selfp.sink.stb ==1 and selfp.sink.eop ==1):
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self.packet.done = True
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class TB(Module):
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def __init__(self):
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self.submodules.hdd = HDD(
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link_debug=False, link_random_level=50,
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transport_debug=False, transport_loopback=True)
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self.submodules.link = SATALink(self.hdd.phy)
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self.submodules.streamer = LinkStreamer()
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streamer_ack_randomizer = AckRandomizer(link_description(32), level=50)
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self.submodules += streamer_ack_randomizer
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self.submodules.logger = LinkLogger()
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logger_ack_randomizer = AckRandomizer(link_description(32), level=50)
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self.submodules += logger_ack_randomizer
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self.comb += [
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Record.connect(self.streamer.source, streamer_ack_randomizer.sink),
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Record.connect(streamer_ack_randomizer.source, self.link.sink),
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Record.connect(self.link.source, logger_ack_randomizer.sink),
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Record.connect(logger_ack_randomizer.source, self.logger.sink)
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]
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def gen_simulation(self, selfp):
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for i in range(8):
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streamer_packet = LinkTXPacket([i for i in range(64)])
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yield from self.streamer.send(streamer_packet)
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yield from self.logger.receive()
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# check results
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s, l, e = check(streamer_packet, self.logger.packet)
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print("shift "+ str(s) + " / length " + str(l) + " / errors " + str(e))
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if __name__ == "__main__":
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run_simulation(TB(), ncycles=2048, vcd_name="my.vcd", keep_files=True)
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