#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2019 Arnaud Durand # Copyright (c) 2022 Martin Hubacek @hubmartin (Twitter) # SPDX-License-Identifier: BSD-2-Clause from migen import * from migen.genlib.resetsync import AsyncResetSynchronizer from litex.gen import LiteXModule from litex_boards.platforms import lattice_ecp5_vip from litex.soc.cores.clock import * from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.integration.soc import SoCRegion from litex.soc.cores.led import LedChaser from litedram.modules import MT41K64M16 from litedram.phy import ECP5DDRPHY from litex.soc.cores.video import VideoVGAPHY from litex.soc.cores.bitbang import I2CMaster # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq): self.rst = Signal() self.cd_init = ClockDomain() self.cd_por = ClockDomain() self.cd_sys = ClockDomain() self.cd_sys2x = ClockDomain() self.cd_sys2x_i = ClockDomain() # # # self.stop = Signal() self.reset = Signal() # Clk / Rst clk100 = platform.request("clk100") rst_n = platform.request("rst_n") # Power on reset por_count = Signal(16, reset=2**16-1) por_done = Signal() self.comb += self.cd_por.clk.eq(clk100) self.comb += por_done.eq(por_count == 0) self.sync.por += If(~por_done, por_count.eq(por_count - 1)) # PLL self.pll = pll = ECP5PLL() self.comb += pll.reset.eq(~por_done | ~rst_n | self.rst) pll.register_clkin(clk100, 100e6) pll.create_clkout(self.cd_sys2x_i, 2*sys_clk_freq) pll.create_clkout(self.cd_init, 25e6) self.specials += [ Instance("ECLKSYNCB", i_ECLKI = self.cd_sys2x_i.clk, i_STOP = self.stop, o_ECLKO = self.cd_sys2x.clk), Instance("CLKDIVF", p_DIV = "2.0", i_ALIGNWD = 0, i_CLKI = self.cd_sys2x.clk, i_RST = self.reset, o_CDIVX = self.cd_sys.clk), AsyncResetSynchronizer(self.cd_sys, ~pll.locked | self.reset), ] # HDMI self.cd_hdmi = ClockDomain() #pll.create_clkout(self.cd_hdmi, 148.5e6) # for terminal "1920x1080@60Hz" #pll.create_clkout(self.cd_hdmi, 160e6) # for terminal "1920x1080@60Hz" #pll.create_clkout(self.cd_hdmi, 80e6) # for terminal "1920x1080@30Hz" pll.create_clkout(self.cd_hdmi, 40e6) # for terminal "800x600@60Hz" # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=int(50e6), toolchain="trellis", with_led_chaser = True, with_video_terminal = True, with_video_framebuffer = False, **kwargs): platform = lattice_ecp5_vip.Platform(toolchain=toolchain) # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on ECP5 Evaluation Board", **kwargs) # DDR3 SDRAM ------------------------------------------------------------------------------- self.ddrphy = ECP5DDRPHY( platform.request("ddram"), sys_clk_freq=sys_clk_freq) self.comb += self.crg.stop.eq(self.ddrphy.init.stop) self.comb += self.crg.reset.eq(self.ddrphy.init.reset) self.add_sdram("sdram", phy = self.ddrphy, module = MT41K64M16(sys_clk_freq, "1:2"), # Not entirely MT41J64M16 but similar and works(c) l2_cache_size = kwargs.get("l2_size", 8192), ) # Video ------------------------------------------------------------------------------------ if with_video_terminal or with_video_framebuffer: pads = platform.request("hdmi") self.videophy = VideoVGAPHY(pads, clock_domain="hdmi") self.videoi2c = I2CMaster(pads) # # 1920x1080@60Hz # pixel_clock_hz = 160e6 # framerate_hz = 60 # pixels_horizontal = 2200 # pixels_vertical = 1125 # 800x600@60Hz pixel_clock_hz = 40e6 framerate_hz = 60 pixels_horizontal = 1056 pixels_vertical = 628 # # 1920x1080@30Hz # pixel_clock_hz = 80e6 # framerate_hz = 30 # pixels_horizontal = 2640 # pixels_vertical = 1125 self.videoi2c.add_init(addr=0x3B, init=[ (0xc7, 0x00), # HDMI configuration (0xc7, 0x00), # Write twice, the first transfer fails for some reason (0x1e, 0x00), # Power up transmitter (0x08, 0x60), # Input Bus/Pixel Repetition (default) (0x00, int((pixel_clock_hz/1e4) %256)), # Pixel clock in MHz * 100 (0x01, int((pixel_clock_hz/1e4)//256)), # (0x02, int((framerate_hz*100) %256)), # Framerate * 100 (0x03, int((framerate_hz*100)//256)), # (0x04, int((pixels_horizontal) %256)), # Pixels horizontal (0x05, int((pixels_horizontal)//256)), # (0x06, int((pixels_vertical) %256)), # Pixels vertical (0x07, int((pixels_vertical)//256)), # (0x1a, 0x00) # end ]) if with_video_terminal: #self.add_video_terminal(phy=self.videophy, timings="1920x1080@60Hz", clock_domain="hdmi") #self.add_video_terminal(phy=self.videophy, timings="1920x1080@30Hz", clock_domain="hdmi") self.add_video_terminal(phy=self.videophy, timings="800x600@60Hz", clock_domain="hdmi") if with_video_framebuffer: #self.add_video_framebuffer(phy=self.videophy, timings="800x600@60Hz", clock_domain="hdmi") self.add_video_framebuffer(phy=self.videophy, timings="640x480@60Hz", clock_domain="hdmi") # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Running code from SPI flash had some side effects on BIOS with enabled DDR3 memory # So I reverted to the FPGA BRAM for BIOS. # # SPI Flash -------------------------------------------------------------------------------- # from litespi.modules import MX25L12835F # from litespi.opcodes import SpiNorFlashOpCodes as Codes # self.add_spi_flash(mode="1x", module=MX25L12835F(Codes.READ_1_1_1), with_master=False) # # Add ROM linker region -------------------------------------------------------------------- # self.bus.add_region("rom", SoCRegion( # origin = self.bus.regions["spiflash"].origin + bios_flash_offset, # size = (16-4)*1024*1024, # linker = True) # ) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=lattice_ecp5_vip.Platform, description="LiteX SoC on ECP5 Evaluation Board") parser.add_target_argument("--sys-clk-freq", default=60e6, help="System clock frequency (default: 60MHz)") args = parser.parse_args() soc = BaseSoC( toolchain = args.toolchain, sys_clk_freq = int(float(args.sys_clk_freq)), **parser.soc_argdict) builder = Builder(soc, **parser.builder_argdict) if args.build: builder.build(**parser.toolchain_argdict) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram", ext=".svf")) # FIXME if __name__ == "__main__": main()