from fractions import Fraction from math import ceil from migen.fhdl.std import * from misoclib import lasmicon MHz = 1000000 clk_freq = (83 + Fraction(1, 3))*MHz clk_period_ns = 1000000000/clk_freq def ns(t, margin=True): if margin: t += clk_period_ns/2 return ceil(t/clk_period_ns) sdram_phy = lasmicon.PhySettings( memtype="DDR", dfi_d=64, nphases=2, rdphase=0, wrphase=1, rdcmdphase=1, wrcmdphase=0, cl=3, read_latency=5, write_latency=0 ) sdram_geom = lasmicon.GeomSettings( bank_a=2, row_a=13, col_a=10 ) sdram_timing = lasmicon.TimingSettings( tRP=ns(15), tRCD=ns(15), tWR=ns(15), tWTR=2, tREFI=ns(7800, False), tRFC=ns(70), req_queue_size=8, read_time=32, write_time=16 ) def decode_sdram(ras_n, cas_n, we_n, bank, address): elts = [] if not ras_n and cas_n and we_n: elts.append("ACTIVATE") elts.append("BANK " + str(bank)) elts.append("ROW " + str(address)) elif ras_n and not cas_n and we_n: elts.append("READ\t") elts.append("BANK " + str(bank)) elts.append("COL " + str(address)) elif ras_n and not cas_n and not we_n: elts.append("WRITE\t") elts.append("BANK " + str(bank)) elts.append("COL " + str(address)) elif ras_n and cas_n and not we_n: elts.append("BST") elif not ras_n and not cas_n and we_n: elts.append("AUTO REFRESH") elif not ras_n and cas_n and not we_n: elts.append("PRECHARGE") if address & 2**10: elts.append("ALL") else: elts.append("BANK " + str(bank)) elif not ras_n and not cas_n and not we_n: elts.append("LMR") return elts class CommandLogger(Module): def __init__(self, cmd, rw=False): self.cmd = cmd if rw: self.comb += self.cmd.ack.eq(1) def do_simulation(self, selfp): elts = ["@" + str(selfp.simulator.cycle_counter)] cmdp = selfp.cmd elts += decode_sdram(cmdp.ras_n, cmdp.cas_n, cmdp.we_n, cmdp.ba, cmdp.a) if len(elts) > 1: print("\t".join(elts)) do_simulation.passive = True class DFILogger(Module): def __init__(self, dfi): self.dfi = dfi def do_simulation(self, selfp): dfip = selfp.dfi for i, p in enumerate(dfip.phases): elts = ["@" + str(selfp.simulator.cycle_counter) + ":" + str(i)] elts += decode_sdram(p.ras_n, p.cas_n, p.we_n, p.bank, p.address) if len(elts) > 1: print("\t".join(elts)) do_simulation.passive = True