from litex.boards.platforms import arty
-from litex.soc.integration.soc_core import *
+from litex.soc.integration.soc_core import mem_decoder
+from litex.soc.integration.soc_sdram import *
from litex.soc.integration.builder import *
+from litedram.modules import MT41K128M16
+from litedram.phy import a7ddrphy
+
from liteeth.phy.mii import LiteEthPHYMII
from liteeth.core.mac import LiteEthMAC
+
class _CRG(Module):
def __init__(self, platform):
self.clock_domains.cd_sys = ClockDomain()
- self.clock_domains.cd_eth = ClockDomain(reset_less=True)
+ self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
+ self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True)
+ self.clock_domains.cd_clk200 = ClockDomain()
+ self.clock_domains.cd_clk50 = ClockDomain()
clk100 = platform.request("clk100")
rst = platform.request("cpu_reset")
pll_locked = Signal()
pll_fb = Signal()
- pll_sys = Signal()
- pll_eth = Signal()
+ self.pll_sys = Signal()
+ pll_sys4x = Signal()
+ pll_sys4x_dqs = Signal()
+ pll_clk200 = Signal()
+ pll_clk50 = Signal()
self.specials += [
Instance("PLLE2_BASE",
p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked,
- # VCO @ 800 MHz
+ # VCO @ 1600 MHz
p_REF_JITTER1=0.01, p_CLKIN1_PERIOD=10.0,
- p_CLKFBOUT_MULT=8, p_DIVCLK_DIVIDE=1,
+ p_CLKFBOUT_MULT=16, p_DIVCLK_DIVIDE=1,
i_CLKIN1=clk100, i_CLKFBIN=pll_fb, o_CLKFBOUT=pll_fb,
# 100 MHz
- p_CLKOUT0_DIVIDE=8, p_CLKOUT0_PHASE=0.0,
- o_CLKOUT0=pll_sys,
+ p_CLKOUT0_DIVIDE=16, p_CLKOUT0_PHASE=0.0,
+ o_CLKOUT0=self.pll_sys,
- # 25 MHz
- p_CLKOUT1_DIVIDE=32, p_CLKOUT1_PHASE=0.0,
- o_CLKOUT1=pll_eth,
+ # 400 MHz
+ p_CLKOUT1_DIVIDE=4, p_CLKOUT1_PHASE=0.0,
+ o_CLKOUT1=pll_sys4x,
- # 200 MHz
- p_CLKOUT2_DIVIDE=4, p_CLKOUT2_PHASE=0.0,
- #o_CLKOUT2=,
+ # 400 MHz dqs
+ p_CLKOUT2_DIVIDE=4, p_CLKOUT2_PHASE=90.0,
+ o_CLKOUT2=pll_sys4x_dqs,
# 200 MHz
- p_CLKOUT3_DIVIDE=4, p_CLKOUT3_PHASE=0.0,
- #o_CLKOUT3=,
+ p_CLKOUT3_DIVIDE=8, p_CLKOUT3_PHASE=0.0,
+ o_CLKOUT3=pll_clk200,
- # 200MHz
- p_CLKOUT4_DIVIDE=4, p_CLKOUT4_PHASE=0.0,
- #o_CLKOUT4=
+ # 50MHz
+ p_CLKOUT4_DIVIDE=32, p_CLKOUT4_PHASE=0.0,
+ o_CLKOUT4=pll_clk50
),
- Instance("BUFG", i_I=pll_sys, o_O=self.cd_sys.clk),
- Instance("BUFG", i_I=pll_eth, o_O=self.cd_eth.clk),
+ Instance("BUFG", i_I=self.pll_sys, o_O=self.cd_sys.clk),
+ Instance("BUFG", i_I=pll_sys4x, o_O=self.cd_sys4x.clk),
+ Instance("BUFG", i_I=pll_sys4x_dqs, o_O=self.cd_sys4x_dqs.clk),
+ Instance("BUFG", i_I=pll_clk200, o_O=self.cd_clk200.clk),
+ Instance("BUFG", i_I=pll_clk50, o_O=self.cd_clk50.clk),
AsyncResetSynchronizer(self.cd_sys, ~pll_locked | ~rst),
+ AsyncResetSynchronizer(self.cd_clk200, ~pll_locked | rst),
+ AsyncResetSynchronizer(self.cd_clk50, ~pll_locked | ~rst),
]
-
+ reset_counter = Signal(4, reset=15)
+ ic_reset = Signal(reset=1)
+ self.sync.clk200 += \
+ If(reset_counter != 0,
+ reset_counter.eq(reset_counter - 1)
+ ).Else(
+ ic_reset.eq(0)
+ )
+ self.specials += Instance("IDELAYCTRL", i_REFCLK=ClockSignal("clk200"), i_RST=ic_reset)
+
+ eth_clk = Signal()
self.specials += [
- Instance("ODDR2", p_DDR_ALIGNMENT="NONE",
- p_INIT=0, p_SRTYPE="SYNC",
- i_D0=0, i_D1=1, i_S=0, i_R=0, i_CE=1,
- i_C0=self.cd_eth.clk, i_C1=~self.cd_eth.clk,
- o_Q=platform.request("eth_ref_clk"))
+ Instance("BUFR", p_BUFR_DIVIDE="4", i_CE=1, i_CLR=0, i_I=clk100, o_O=eth_clk),
+ Instance("BUFG", i_I=eth_clk, o_O=platform.request("eth_ref_clk")),
]
-class BaseSoC(SoCCore):
+class BaseSoC(SoCSDRAM):
+ csr_map = {
+ "ddrphy": 16,
+ }
+ csr_map.update(SoCSDRAM.csr_map)
def __init__(self, **kwargs):
platform = arty.Platform()
- SoCCore.__init__(self, platform, clk_freq=100*1000000,
+ SoCSDRAM.__init__(self, platform, clk_freq=100*1000000,
integrated_rom_size=0x8000,
integrated_sram_size=0x8000,
- integrated_main_ram_size=0x10000,
**kwargs)
self.submodules.crg = _CRG(platform)
+ # sdram
+ self.submodules.ddrphy = a7ddrphy.A7DDRPHY(platform.request("ddram"))
+ self.add_constant("A7DDRPHY_BITSLIP", 2)
+ self.add_constant("A7DDRPHY_DELAY", 6)
+ sdram_module = MT41K128M16(self.clk_freq, "1:4")
+ self.register_sdram(self.ddrphy,
+ sdram_module.geom_settings,
+ sdram_module.timing_settings)
+
class MiniSoC(BaseSoC):
csr_map = {
self.add_wb_slave(mem_decoder(self.mem_map["ethmac"]), self.ethmac.bus)
self.add_memory_region("ethmac", self.mem_map["ethmac"] | self.shadow_base, 0x2000)
+ self.ethphy.crg.cd_eth_rx.clk.attr.add("keep")
+ self.ethphy.crg.cd_eth_tx.clk.attr.add("keep")
+ self.platform.add_period_constraint(self.crg.cd_sys.clk, 10.0)
+ self.platform.add_period_constraint(self.ethphy.crg.cd_eth_rx.clk, 80.0)
+ self.platform.add_period_constraint(self.ethphy.crg.cd_eth_tx.clk, 80.0)
+ self.platform.add_false_path_constraints(
+ self.crg.cd_sys.clk,
+ self.ethphy.crg.cd_eth_rx.clk,
+ self.ethphy.crg.cd_eth_tx.clk)
+
def main():
parser = argparse.ArgumentParser(description="LiteX SoC port to Arty")
builder_args(parser)
- soc_core_args(parser)
+ soc_sdram_args(parser)
parser.add_argument("--with-ethernet", action="store_true",
help="enable Ethernet support")
args = parser.parse_args()
cls = MiniSoC if args.with_ethernet else BaseSoC
- soc = cls(**soc_core_argdict(args))
+ soc = cls(**soc_sdram_argdict(args))
builder = Builder(soc, **builder_argdict(args))
builder.build()
from litex.boards.platforms import nexys_video
-from litex.soc.integration.soc_core import *
+from litex.soc.integration.soc_core import mem_decoder
+from litex.soc.integration.soc_sdram import *
from litex.soc.integration.builder import *
+from litedram.modules import MT41K256M16
+from litedram.phy import a7ddrphy
+
from liteeth.phy.s7rgmii import LiteEthPHYRGMII
from liteeth.core.mac import LiteEthMAC
class _CRG(Module):
def __init__(self, platform):
self.clock_domains.cd_sys = ClockDomain()
+ self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
+ self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True)
self.clock_domains.cd_clk200 = ClockDomain()
+ self.clock_domains.cd_clk100 = ClockDomain()
clk100 = platform.request("clk100")
rst = platform.request("cpu_reset")
pll_locked = Signal()
pll_fb = Signal()
- pll_sys = Signal()
+ self.pll_sys = Signal()
+ pll_sys4x = Signal()
+ pll_sys4x_dqs = Signal()
pll_clk200 = Signal()
self.specials += [
Instance("PLLE2_BASE",
p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked,
- # VCO @ 800 MHz
+ # VCO @ 1600 MHz
p_REF_JITTER1=0.01, p_CLKIN1_PERIOD=10.0,
- p_CLKFBOUT_MULT=8, p_DIVCLK_DIVIDE=1,
+ p_CLKFBOUT_MULT=16, p_DIVCLK_DIVIDE=1,
i_CLKIN1=clk100, i_CLKFBIN=pll_fb, o_CLKFBOUT=pll_fb,
# 100 MHz
- p_CLKOUT0_DIVIDE=8, p_CLKOUT0_PHASE=0.0,
- o_CLKOUT0=pll_sys,
+ p_CLKOUT0_DIVIDE=16, p_CLKOUT0_PHASE=0.0,
+ o_CLKOUT0=self.pll_sys,
+
+ # 400 MHz
+ p_CLKOUT1_DIVIDE=4, p_CLKOUT1_PHASE=0.0,
+ o_CLKOUT1=pll_sys4x,
+
+ # 400 MHz dqs
+ p_CLKOUT2_DIVIDE=4, p_CLKOUT2_PHASE=90.0,
+ o_CLKOUT2=pll_sys4x_dqs,
# 200 MHz
- p_CLKOUT3_DIVIDE=4, p_CLKOUT3_PHASE=0.0,
- o_CLKOUT3=pll_clk200
+ p_CLKOUT3_DIVIDE=8, p_CLKOUT3_PHASE=0.0,
+ o_CLKOUT3=pll_clk200,
+
+ # 400MHz
+ p_CLKOUT4_DIVIDE=4, p_CLKOUT4_PHASE=0.0,
+ #o_CLKOUT4=
),
- Instance("BUFG", i_I=pll_sys, o_O=self.cd_sys.clk),
+ Instance("BUFG", i_I=self.pll_sys, o_O=self.cd_sys.clk),
+ Instance("BUFG", i_I=pll_sys4x, o_O=self.cd_sys4x.clk),
+ Instance("BUFG", i_I=pll_sys4x_dqs, o_O=self.cd_sys4x_dqs.clk),
Instance("BUFG", i_I=pll_clk200, o_O=self.cd_clk200.clk),
+ Instance("BUFG", i_I=clk100, o_O=self.cd_clk100.clk),
AsyncResetSynchronizer(self.cd_sys, ~pll_locked | ~rst),
AsyncResetSynchronizer(self.cd_clk200, ~pll_locked | rst),
+ AsyncResetSynchronizer(self.cd_clk100, ~pll_locked | rst),
]
reset_counter = Signal(4, reset=15)
self.specials += Instance("IDELAYCTRL", i_REFCLK=ClockSignal("clk200"), i_RST=ic_reset)
-class BaseSoC(SoCCore):
+class BaseSoC(SoCSDRAM):
+ csr_map = {
+ "ddrphy": 16,
+ }
+ csr_map.update(SoCSDRAM.csr_map)
def __init__(self, **kwargs):
platform = nexys_video.Platform()
- SoCCore.__init__(self, platform, clk_freq=100*1000000,
+ SoCSDRAM.__init__(self, platform, clk_freq=100*1000000,
integrated_rom_size=0x8000,
integrated_sram_size=0x8000,
- integrated_main_ram_size=0x10000,
**kwargs)
self.submodules.crg = _CRG(platform)
+ # sdram
+ self.submodules.ddrphy = a7ddrphy.A7DDRPHY(platform.request("ddram"))
+ self.add_constant("A7DDRPHY_BITSLIP", 2)
+ self.add_constant("A7DDRPHY_DELAY", 8)
+ sdram_module = MT41K256M16(self.clk_freq, "1:4")
+ self.register_sdram(self.ddrphy,
+ sdram_module.geom_settings,
+ sdram_module.timing_settings)
+
class MiniSoC(BaseSoC):
csr_map = {
self.add_wb_slave(mem_decoder(self.mem_map["ethmac"]), self.ethmac.bus)
self.add_memory_region("ethmac", self.mem_map["ethmac"] | self.shadow_base, 0x2000)
+ self.ethphy.crg.cd_eth_rx.clk.attr.add("keep")
+ self.ethphy.crg.cd_eth_tx.clk.attr.add("keep")
+ self.platform.add_period_constraint(self.crg.cd_sys.clk, 10.0)
+ self.platform.add_period_constraint(self.ethphy.crg.cd_eth_rx.clk, 8.0)
+ self.platform.add_period_constraint(self.ethphy.crg.cd_eth_tx.clk, 8.0)
+ self.platform.add_false_path_constraints(
+ self.crg.cd_sys.clk,
+ self.ethphy.crg.cd_eth_rx.clk,
+ self.ethphy.crg.cd_eth_tx.clk)
+
+
def main():
parser = argparse.ArgumentParser(description="LiteX SoC port to Nexys Video")
builder_args(parser)
- soc_core_args(parser)
+ soc_sdram_args(parser)
parser.add_argument("--with-ethernet", action="store_true",
help="enable Ethernet support")
args = parser.parse_args()
cls = MiniSoC if args.with_ethernet else BaseSoC
- soc = cls(**soc_core_argdict(args))
+ soc = cls(**soc_sdram_argdict(args))
builder = Builder(soc, **builder_argdict(args))
builder.build()
projects / litex.git / commitdiff