#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2020 Pepijn de Vos # Copyright (c) 2021 Florent Kermarrec # SPDX-License-Identifier: BSD-2-Clause from migen import * from migen.genlib.resetsync import AsyncResetSynchronizer from litex.gen import * from litex_boards.platforms import trenz_tec0117 from litex.build.io import DDROutput from litex.soc.cores.clock.gowin_gw1n import GW1NPLL from litex.soc.integration.soc_core import * from litex.soc.integration.soc import SoCRegion from litex.soc.integration.builder import * from litex.soc.cores.led import LedChaser from litedram.modules import MT48LC4M16 # FIXME: use EtronTech reference. from litedram.phy import GENSDRPHY, HalfRateGENSDRPHY # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, sdram_rate): self.rst = Signal() self.cd_sys = ClockDomain() self.cd_sys2x = ClockDomain() # # # # Clk / Rst clk100 = platform.request("clk100") rst_n = platform.request("rst_n") # PLL self.pll = pll = GW1NPLL(devicename=platform.devicename, device=platform.device) self.comb += pll.reset.eq(~rst_n) pll.register_clkin(clk100, 100e6) if sdram_rate == "1:2": pll.create_clkout(self.cd_sys2x, 2*sys_clk_freq, with_reset=False) self.specials += Instance("CLKDIV", p_DIV_MODE= "2", i_RESETN = rst_n, i_HCLKIN = self.cd_sys2x.clk, o_CLKOUT = self.cd_sys.clk ) else: pll.create_clkout(self.cd_sys, sys_clk_freq, with_reset=False) self.specials += AsyncResetSynchronizer(self.cd_sys, ~rst_n) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, bios_flash_offset=0x0000, sys_clk_freq=25e6, sdram_rate="1:1", with_led_chaser = True, toolchain="gowin", **kwargs): platform = trenz_tec0117.Platform(toolchain=toolchain) # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq, sdram_rate) # SoCCore ---------------------------------------------------------------------------------- # Disable Integrated ROM. kwargs["integrated_rom_size"] = 0 SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on TEC0117", **kwargs) # SPI Flash -------------------------------------------------------------------------------- from litespi.modules import W74M64FV from litespi.opcodes import SpiNorFlashOpCodes as Codes self.add_spi_flash(mode="4x", module=W74M64FV(Codes.READ_1_1_4), with_master=False) # Add ROM linker region -------------------------------------------------------------------- self.bus.add_region("rom", SoCRegion( origin = self.bus.regions["spiflash"].origin + bios_flash_offset, size = 32 * KILOBYTE, linker = True) ) self.cpu.set_reset_address(self.bus.regions["rom"].origin) # SDR SDRAM -------------------------------------------------------------------------------- if not self.integrated_main_ram_size: class SDRAMPads: def __init__(self): self.clk = platform.request("O_sdram_clk") self.cke = platform.request("O_sdram_cke") self.cs_n = platform.request("O_sdram_cs_n") self.cas_n = platform.request("O_sdram_cas_n") self.ras_n = platform.request("O_sdram_ras_n") self.we_n = platform.request("O_sdram_wen_n") self.dm = platform.request("O_sdram_dqm") self.a = platform.request("O_sdram_addr") self.ba = platform.request("O_sdram_ba") self.dq = platform.request("IO_sdram_dq") sdram_pads = SDRAMPads() sdram_clk = ClockSignal("sys2x" if sdram_rate == "1:2" else "sys") # FIXME: use phase shift from PLL. self.specials += DDROutput(0, 1, sdram_pads.clk, sdram_clk) sdrphy_cls = HalfRateGENSDRPHY if sdram_rate == "1:2" else GENSDRPHY self.sdrphy = sdrphy_cls(sdram_pads, sys_clk_freq) self.add_sdram("sdram", phy = self.sdrphy, module = MT48LC4M16(sys_clk_freq, sdram_rate), # FIXME. l2_cache_size = 128, ) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Flash -------------------------------------------------------------------------------------------- def flash(bios_flash_offset, toolchain="gowin"): # Create FTDI <--> SPI Flash proxy bitstream and load it. # ------------------------------------------------------- platform = trenz_tec0117.Platform(toolchain=toolchain) flash = platform.request("spiflash", 0) bus = platform.request("spiflash", 1) module = Module() module.comb += [ flash.clk.eq(bus.clk), flash.cs_n.eq(bus.cs_n), flash.mosi.eq(bus.mosi), bus.miso.eq(flash.miso), ] platform.build(module) prog = platform.create_programmer() prog.flash(0, "build/top.fs") # Flash Image through proxy Bitstream using pyspiflash # ------------------------------------ from spiflash.serialflash import SerialFlashManager dev = SerialFlashManager.get_flash_device("ftdi://ftdi:2232/2") dev.TIMINGS["chip"] = (4, 60) # Chip is too slow print("Erasing flash...") dev.erase(0, -1) with open("build/trenz_tec0117/software/bios/bios.bin", "rb") as f: bios = f.read() print("Programming flash...") dev.write(bios_flash_offset, bios) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=trenz_tec0117.Platform, description="LiteX SoC on TEC0117.") parser.add_target_argument("--bios-flash-offset", default="0x0000", help="BIOS offset in SPI Flash.") parser.add_target_argument("--flash", action="store_true", help="Flash Bitstream and BIOS.") parser.add_target_argument("--sys-clk-freq", default=25e6, type=float, help="System clock frequency.") sdopts = parser.target_group.add_mutually_exclusive_group() sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.") sdopts.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.") args = parser.parse_args() soc = BaseSoC( bios_flash_offset = int(args.bios_flash_offset, 0), sys_clk_freq = args.sys_clk_freq, toolchain = args.toolchain, **parser.soc_argdict ) soc.platform.add_extension(trenz_tec0117._sdcard_pmod_io) if args.with_spi_sdcard: soc.add_spi_sdcard() if args.with_sdcard: soc.add_sdcard() 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")) if args.flash: prog = soc.platform.create_programmer() flash(int(args.bios_flash_offset, 0), toolchain=args.toolchain) prog.flash(0, builder.get_bitstream_filename(mode="flash", ext=".fs")) if __name__ == "__main__": main()