uart.c: rx overflow fix and tx simplification

[litex.git] / targets / simple.py

diff --git a/targets/simple.py b/targets/simple.py
index f88f866999539cf5de603259a80998b75fec9c30..3d2568483ac7f9b719ca33dc6cdcf05268ca8ac2 100644 (file)
--- a/targets/simple.py
+++ b/targets/simple.py
@@ -1,39 +1,48 @@
 from migen.fhdl.std import *
 from migen.bus import wishbone
-
-from misoclib.gensoc import GenSoC, IntegratedBIOS
-
-class _CRG(Module):
-       def __init__(self, clk_in):
-               self.clock_domains.cd_sys = ClockDomain()
-               self.clock_domains.cd_por = ClockDomain(reset_less=True)
-
-               # Power on Reset (vendor agnostic)
-               rst_n = Signal()
-               self.sync.por += rst_n.eq(1)
-               self.comb += [
-                       self.cd_sys.clk.eq(clk_in),
-                       self.cd_por.clk.eq(clk_in),
-                       self.cd_sys.rst.eq(~rst_n)
-               ]
-
-class SimpleSoC(GenSoC, IntegratedBIOS):
-       default_platform = "de0nano"    # /!\ Adapt this!
-       clk_name = "clk50"                              # /!\ Adapt this!
-       clk_freq = 50*1000000                   # /!\ Adapt this!
-
-       def __init__(self, platform):
-               GenSoC.__init__(self, platform,
-                       clk_freq=self.clk_freq,
-                       cpu_reset_address=0)
-               IntegratedBIOS.__init__(self)
-
-               self.submodules.crg = _CRG(platform.request(self.clk_name))
-
-               # use on-board SRAM as SDRAM
-               sys_ram_size = 16*1024
-               self.submodules.sys_ram = wishbone.SRAM(sys_ram_size)
-               self.add_wb_slave(lambda a: a[27:29] == 2, self.sys_ram.bus)
-               self.add_cpu_memory_region("sdram", 0x40000000, sys_ram_size)
-
-default_subtarget = SimpleSoC
+from migen.genlib.io import CRG
+
+from misoclib.soc import SoC, mem_decoder
+from misoclib.com.liteeth.phy import LiteEthPHY
+from misoclib.com.liteeth.core.mac import LiteEthMAC
+
+
+class BaseSoC(SoC):
+    def __init__(self, platform, **kwargs):
+        SoC.__init__(self, platform,
+            clk_freq=int((1/(platform.default_clk_period))*1000000000),
+            integrated_rom_size=0x8000,
+            integrated_main_ram_size=16*1024,
+            **kwargs)
+        self.submodules.crg = CRG(platform.request(platform.default_clk_name))
+
+
+class MiniSoC(BaseSoC):
+    csr_map = {
+        "ethphy": 20,
+        "ethmac": 21
+    }
+    csr_map.update(BaseSoC.csr_map)
+
+    interrupt_map = {
+        "ethmac": 2,
+    }
+    interrupt_map.update(BaseSoC.interrupt_map)
+
+    mem_map = {
+        "ethmac": 0x30000000,  # (shadow @0xb0000000)
+    }
+    mem_map.update(BaseSoC.mem_map)
+
+    def __init__(self, platform, **kwargs):
+        BaseSoC.__init__(self, platform, **kwargs)
+
+        self.submodules.ethphy = LiteEthPHY(platform.request("eth_clocks"),
+                                            platform.request("eth"))
+        self.submodules.ethmac = LiteEthMAC(phy=self.ethphy, dw=32,
+                                            interface="wishbone",
+                                            with_preamble_crc=False)
+        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)
+
+default_subtarget = BaseSoC