#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2019 msloniewski # SPDX-License-Identifier: BSD-2-Clause # Build/Use: # ./terasic_deca.py --uart-name jtag_uart --build --load # litex_term --jtag-config ../prog/openocd_usb_blaster2.cfg jtag from migen import * from litex_boards.platforms import terasic_deca from litex.gen import * from litex.soc.cores.clock import Max10PLL from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.cores.video import VideoDVIPHY from litex.soc.cores.led import LedChaser from liteeth.phy.mii import LiteEthPHYMII # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, with_usb_pll=False): self.rst = Signal() self.cd_sys = ClockDomain() self.cd_hdmi = ClockDomain() self.cd_usb = ClockDomain() # # # # Clk / Rst. clk50 = platform.request("clk50") # PLL self.pll = pll = Max10PLL(speedgrade="-6") self.comb += pll.reset.eq(self.rst) pll.register_clkin(clk50, 50e6) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_hdmi, 40e6) # USB PLL. if with_usb_pll: ulpi = platform.request("ulpi") self.comb += ulpi.cs.eq(1) # Enable ULPI chip to enable the ULPI clock. self.usb_pll = pll = Max10PLL(speedgrade="-6") self.comb += pll.reset.eq(self.rst) pll.register_clkin(ulpi.clk, 60e6) pll.create_clkout(self.cd_usb, 60e6, phase=-120) # -120° from DECA's example (also validated with LUNA). # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=50e6, with_led_chaser = True, with_video_terminal = False, with_spi_sdcard = False, with_ethernet = False, with_etherbone = False, eth_ip = "192.168.1.50", eth_dynamic_ip = False, **kwargs): self.platform = platform = terasic_deca.Platform() # CRG -------------------------------------------------------------------------------------- self.crg = self.crg = _CRG(platform, sys_clk_freq, with_usb_pll=False) # SoCCore ---------------------------------------------------------------------------------- # Defaults to JTAG-UART since no hardware UART. real_uart_name = kwargs["uart_name"] if real_uart_name == "serial": if kwargs["with_jtagbone"]: kwargs["uart_name"] = "crossover" else: kwargs["uart_name"] = "jtag_uart" if kwargs["with_uartbone"]: kwargs["uart_name"] = "crossover" SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Terasic DECA", **kwargs) # Ethernet --------------------------------------------------------------------------------- if with_ethernet or with_etherbone: self.platform.toolchain.additional_sdc_commands += [ 'create_clock -name eth_rx_clk -period 40.0 [get_ports {eth_clocks_rx}]', 'create_clock -name eth_tx_clk -period 40.0 [get_ports {eth_clocks_tx}]', 'set_false_path -from [get_clocks {sys_clk}] -to [get_clocks {eth_rx_clk}]', 'set_false_path -from [get_clocks {sys_clk}] -to [get_clocks {eth_tx_clk}]', 'set_false_path -from [get_clocks {eth_rx_clk}] -to [get_clocks {eth_tx_clk}]', ] self.ethphy = LiteEthPHYMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth")) if with_ethernet: self.add_ethernet(phy=self.ethphy, dynamic_ip=eth_dynamic_ip) if with_etherbone: self.add_etherbone(phy=self.ethphy, ip_address=eth_ip) # Video ------------------------------------------------------------------------------------ if with_video_terminal: self.videophy = VideoDVIPHY(platform.request("hdmi"), clock_domain="hdmi") self.add_video_terminal(phy=self.videophy, timings="800x600@60Hz", clock_domain="hdmi") # SPI SD card ------------------------------------------------------------------------------ if with_spi_sdcard: self.add_spi_sdcard() sd_aux = self.platform.request("spisdcard_aux") # Set the SD card supply to 3.3V self.comb += sd_aux.sel.eq(0) # Set the direction of the level shifter (0 = SD to FPGA; 1 = FPGA to SD) self.comb += sd_aux.cmd_dir.eq(1) self.comb += sd_aux.d0_dir.eq(0) self.comb += sd_aux.d123_dir.eq(1) # Keep the unused data lines high self.comb += sd_aux.dat1.eq(1) self.comb += sd_aux.dat2.eq(1) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=terasic_deca.Platform, description="LiteX SoC on DECA.") parser.add_target_argument("--sys-clk-freq", default=50e6, type=float, help="System clock frequency.") ethopts = parser.target_group.add_mutually_exclusive_group() ethopts.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.") ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.") parser.add_target_argument("--eth-ip", default="192.168.1.50", help="Ethernet/Etherbone IP address.") parser.add_target_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting.") parser.add_target_argument("--with-video-terminal", action="store_true", help="Enable Video Terminal (VGA).") parser.add_target_argument("--with-spi-sdcard", action="store_true", help="Enable SPI SD card controller.") args = parser.parse_args() soc = BaseSoC( sys_clk_freq = args.sys_clk_freq, with_ethernet = args.with_ethernet, with_etherbone = args.with_etherbone, eth_ip = args.eth_ip, eth_dynamic_ip = args.eth_dynamic_ip, with_video_terminal = args.with_video_terminal, with_spi_sdcard = args.with_spi_sdcard, **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")) if __name__ == "__main__": main()