129 lines
4.7 KiB
Python
Executable File
129 lines
4.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# This file is Copyright (c) 2019 msloniewski <marcin.sloniewski@gmail.com>
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# License: BSD
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import os
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import argparse
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from migen import *
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from migen.genlib.resetsync import AsyncResetSynchronizer
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from litex.build.io import DDROutput
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from litex_boards.platforms import de10lite
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from litex.soc.cores.clock import Max10PLL
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from litex.soc.integration.soc_core import *
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from litex.soc.integration.soc_sdram import *
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from litex.soc.integration.builder import *
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from litex.soc.cores.led import LedChaser
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from litedram.modules import IS42S16320
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from litedram.phy import GENSDRPHY
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from litevideo.terminal.core import Terminal
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# CRG ----------------------------------------------------------------------------------------------
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class _CRG(Module):
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def __init__(self, platform, sys_clk_freq):
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self.clock_domains.cd_sys = ClockDomain()
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self.clock_domains.cd_sys_ps = ClockDomain(reset_less=True)
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self.clock_domains.cd_vga = ClockDomain(reset_less=True)
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# # #
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# Clk / Rst
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clk50 = platform.request("clk50")
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# PLL
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self.submodules.pll = pll = Max10PLL(speedgrade="-7")
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pll.register_clkin(clk50, 50e6)
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pll.create_clkout(self.cd_sys, sys_clk_freq)
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pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=90)
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pll.create_clkout(self.cd_vga, 25e6)
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# SDRAM clock
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self.specials += DDROutput(1, 0, platform.request("sdram_clock"), ClockSignal("sys_ps"))
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, sys_clk_freq=int(50e6), **kwargs):
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platform = de10lite.Platform()
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, clk_freq=sys_clk_freq, **kwargs)
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# CRG --------------------------------------------------------------------------------------
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self.submodules.crg = _CRG(platform, sys_clk_freq)
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# SDR SDRAM --------------------------------------------------------------------------------
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if not self.integrated_main_ram_size:
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self.submodules.sdrphy = GENSDRPHY(platform.request("sdram"))
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self.add_sdram("sdram",
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phy = self.sdrphy,
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module = IS42S16320(sys_clk_freq, "1:1"),
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origin = self.mem_map["main_ram"],
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size = kwargs.get("max_sdram_size", 0x40000000),
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l2_cache_size = kwargs.get("l2_size", 8192),
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l2_cache_min_data_width = kwargs.get("min_l2_data_width", 128),
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l2_cache_reverse = True
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)
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# Leds -------------------------------------------------------------------------------------
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self.submodules.leds = LedChaser(
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pads = Cat(*[platform.request("user_led", i) for i in range(10)]),
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sys_clk_freq = sys_clk_freq)
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self.add_csr("leds")
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# VGASoC -------------------------------------------------------------------------------------------
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class VGASoC(BaseSoC):
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mem_map = {
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"terminal": 0x30000000,
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}
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mem_map.update(BaseSoC.mem_map)
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def __init__(self, **kwargs):
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BaseSoC.__init__(self, **kwargs)
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# create VGA terminal
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self.submodules.terminal = terminal = Terminal()
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self.add_wb_slave(self.mem_map["terminal"], self.terminal.bus)
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self.add_memory_region("terminal", self.mem_map["terminal"], 0x10000)
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# connect VGA pins
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vga = self.platform.request('vga_out', 0)
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self.comb += [
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vga.vsync_n.eq(terminal.vsync),
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vga.hsync_n.eq(terminal.hsync),
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vga.r.eq(terminal.red[4:8]),
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vga.g.eq(terminal.green[4:8]),
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vga.b.eq(terminal.blue[4:8])
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]
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# Build --------------------------------------------------------------------------------------------
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def main():
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parser = argparse.ArgumentParser(description="LiteX SoC on DE10 Lite")
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parser.add_argument("--build", action="store_true", help="Build bitstream")
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parser.add_argument("--load", action="store_true", help="Load bitstream")
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builder_args(parser)
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soc_sdram_args(parser)
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parser.add_argument("--with-vga", action="store_true", help="Enable VGA support")
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args = parser.parse_args()
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cls = VGASoC if args.with_vga else BaseSoC
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soc = cls(**soc_sdram_argdict(args))
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builder = Builder(soc, **builder_argdict(args))
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builder.build(run=args.build)
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if args.load:
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prog = soc.platform.create_programmer()
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prog.load_bitstream(os.path.join(builder.gateware_dir, "top.sof"))
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if __name__ == "__main__":
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main()
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