add ARTIQMidiSoC based on pipistrello

m-labs · Mar 19, 2015 · fdca0a7 · sbourdeauducq · Apr 5, 2015 · jordens
1 parent 2257cfa
commit fdca0a7
Showing 1 changed file with 138 additions and 0 deletions.
diff --git a/soc/targets/artiq_pipistrello.py b/soc/targets/artiq_pipistrello.py
@@ -0,0 +1,138 @@
+from migen.fhdl.std import *
+from migen.bank.description import *
+from migen.bank import wbgen
+from mibuild.generic_platform import *
+
+from misoclib.cpu.peripherals import gpio
+from targets.pipistrello import BaseSoC
+
+from artiq.gateware import rtio, ad9858
+
+
+_tester_io = [
+    ("ext_led", 0, Pins("B:7"), IOStandard("LVTTL")),
+
+    ("pmt", 0, Pins("C:13"), IOStandard("LVTTL")),
+    ("pmt", 1, Pins("C:14"), IOStandard("LVTTL")),
+    ("xtrig", 0, Pins("C:12"), IOStandard("LVTTL")),
+    ("dds_clock", 0, Pins("C:15"), IOStandard("LVTTL")),
+
+    ("ttl", 0, Pins("C:11"), IOStandard("LVTTL")),
+    ("ttl", 1, Pins("C:10"), IOStandard("LVTTL")),
+    ("ttl", 2, Pins("C:9"), IOStandard("LVTTL")),
+    ("ttl", 3, Pins("C:8"), IOStandard("LVTTL")),
+    ("ttl", 4, Pins("C:7"), IOStandard("LVTTL")),
+    ("ttl", 5, Pins("C:6"), IOStandard("LVTTL")),
+    ("ttl", 6, Pins("C:5"), IOStandard("LVTTL")),
+    ("ttl", 7, Pins("C:4"), IOStandard("LVTTL")),
+    ("ttl_l_tx_en", 0, Pins("A:9"), IOStandard("LVTTL")),
+
+    ("ttl", 8, Pins("C:3"), IOStandard("LVTTL")),
+    ("ttl", 9, Pins("C:2"), IOStandard("LVTTL")),
+    ("ttl", 10, Pins("C:1"), IOStandard("LVTTL")),
+    ("ttl", 11, Pins("C:0"), IOStandard("LVTTL")),
+    ("ttl", 12, Pins("B:4"), IOStandard("LVTTL")),
+    ("ttl", 13, Pins("A:11"), IOStandard("LVTTL")),
+    ("ttl", 14, Pins("B:5"), IOStandard("LVTTL")),
+    ("ttl", 15, Pins("A:10"), IOStandard("LVTTL")),
+    ("ttl_h_tx_en", 0, Pins("B:6"), IOStandard("LVTTL")),
+
+    ("dds", 0,
+        Subsignal("a", Pins("A:5 B:10 A:6 B:9 A:7 B:8")),
+        Subsignal("d", Pins("A:12 B:3 A:13 B:2 A:14 B:1 A:15 B:0")),
+        Subsignal("sel", Pins("A:2 B:14 A:1 B:15 A:0")),
+        Subsignal("p", Pins("A:8 B:12")),
+        Subsignal("fud_n", Pins("B:11")),
+        Subsignal("wr_n", Pins("A:4")),
+        Subsignal("rd_n", Pins("B:13")),
+        Subsignal("rst_n", Pins("A:3")),
+        IOStandard("LVTTL")),
+]
+
+
+class _RTIOMiniCRG(Module, AutoCSR):
+    def __init__(self, platform):
+        self._r_clock_sel = CSRStorage()
+        self.clock_domains.cd_rtio = ClockDomain()
+
+        # 80MHz -> 125MHz
+        rtio_internal_clk = Signal()
+        self.specials += Instance("DCM_CLKGEN",
+                                  p_CLKFXDV_DIVIDE=2,
+                                  p_CLKFX_DIVIDE=16,
+                                  p_CLKFX_MD_MAX=1.6,
+                                  p_CLKFX_MULTIPLY=25,
+                                  p_CLKIN_PERIOD=12.5,
+                                  p_SPREAD_SPECTRUM="NONE",
+                                  p_STARTUP_WAIT="FALSE",
+                                  i_CLKIN=ClockSignal(),
+                                  o_CLKFX=rtio_internal_clk,
+                                  i_FREEZEDCM=0,
+                                  i_RST=ResetSignal())
+
+        rtio_external_clk = platform.request("dds_clock")
+        platform.add_period_constraint(rtio_external_clk, 8.0)
+        self.specials += Instance("BUFGMUX",
+                                  i_I0=rtio_internal_clk,
+                                  i_I1=rtio_external_clk,
+                                  i_S=self._r_clock_sel.storage,
+                                  o_O=self.cd_rtio.clk)
+
+        platform.add_platform_command("""
+NET "{rtio_clk}" TNM_NET = "GRPrtio_clk";
+NET "sys_clk" TNM_NET = "GRPsys_clk";
+TIMESPEC "TSfix_ise1" = FROM "GRPrtio_clk" TO "GRPsys_clk" TIG;
+TIMESPEC "TSfix_ise2" = FROM "GRPsys_clk" TO "GRPrtio_clk" TIG;
+""", rtio_clk=rtio_internal_clk)
+
+
+class ARTIQMidiSoC(BaseSoC):
+    csr_map = {
+        "rtio": None,  # mapped on Wishbone instead
+        "rtiocrg": 13
+    }
+    csr_map.update(BaseSoC.csr_map)
+
+    def __init__(self, platform, cpu_type="or1k", **kwargs):
+        BaseSoC.__init__(self, platform, cpu_type=cpu_type, **kwargs)
+        platform.add_extension(_tester_io)
+
+        self.submodules.leds = gpio.GPIOOut(Cat(
+            platform.request("user_led", 0),
+            platform.request("user_led", 1),
+            platform.request("user_led", 2),
+            platform.request("user_led", 3),
+            platform.request("user_led", 4),
+            platform.request("ext_led", 0),
+        ))
+
+        fud = Signal()
+        self.comb += [
+            platform.request("ttl_l_tx_en").eq(1),
+            platform.request("ttl_h_tx_en").eq(1)
+        ]
+        rtio_ins = [platform.request("pmt", i) for i in range(2)]
+        rtio_ins += [platform.request("xtrig", 0)]
+        rtio_outs = [platform.request("ttl", i) for i in range(16)]
+        rtio_outs += [fud]
+
+        self.submodules.rtiocrg = _RTIOMiniCRG(platform)
+        self.submodules.rtiophy = rtio.phy.SimplePHY(
+            rtio_ins + rtio_outs,
+            output_only_pads=set(rtio_outs))
+        self.submodules.rtio = rtio.RTIO(self.rtiophy,
+                                         clk_freq=125000000,
+                                         ififo_depth=512)
+
+        rtio_csrs = self.rtio.get_csrs()
+        self.submodules.rtiowb = wbgen.Bank(rtio_csrs)
+        self.add_wb_slave(lambda a: a[26:29] == 2, self.rtiowb.bus)
+        self.add_csr_region("rtio", 0xa0000000, 32, rtio_csrs)
+
+        dds_pads = platform.request("dds")
+        self.submodules.dds = ad9858.AD9858(dds_pads)
+        self.add_wb_slave(lambda a: a[26:29] == 3, self.dds.bus)
+        self.comb += dds_pads.fud_n.eq(~fud)
+
+
+default_subtarget = ARTIQMidiSoC