44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
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from migen.fhdl.std import *
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from migen.bus import lasmibus
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from migen.actorlib import dma_lasmi
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from migen.sim.generic import Simulator, TopLevel, Proxy
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from milkymist.lasmicon import *
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from common import sdram_phy, sdram_geom, sdram_timing, DFILogger
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class TB(Module):
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def __init__(self):
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self.submodules.ctler = LASMIcon(sdram_phy, sdram_geom, sdram_timing)
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# FIXME: remove dummy master
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self.submodules.xbar = lasmibus.Crossbar([self.ctler.lasmic], 2, self.ctler.nrowbits)
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self.submodules.logger = DFILogger(self.ctler.dfi)
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self.submodules.writer = dma_lasmi.Writer(self.xbar.masters[0])
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self.comb += self.writer.address_data.stb.eq(1)
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pl = self.writer.address_data.payload
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pl.a.reset = 255
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pl.d.reset = pl.a.reset*2
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self.sync += If(self.writer.address_data.ack,
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pl.a.eq(pl.a + 1),
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pl.d.eq(pl.d + 2)
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)
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self.open_row = None
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def do_simulation(self, s):
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dfip = Proxy(s, self.ctler.dfi)
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for p in dfip.phases:
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if p.ras_n and not p.cas_n and not p.we_n: # write
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d = dfip.phases[0].wrdata | (dfip.phases[1].wrdata << 64)
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print(d)
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if d != p.address//2 + p.bank*512 + self.open_row*2048:
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print("**** ERROR ****")
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elif not p.ras_n and p.cas_n and p.we_n: # activate
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self.open_row = p.address
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def main():
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sim = Simulator(TB(), TopLevel("my.vcd"))
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sim.run(3500)
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main()
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