# Portions of this file incorporate code licensed under the # BSD 2-Clause License. See COPYING. # There is nothing fundamental about the Arty A7(35|100)T to this # design, but another eval board will require some porting. from migen import * import litex_boards.platforms.digilent_arty as board_spec from litex.soc.cores.gpio import GPIOTristate from litex.soc.integration.builder import Builder from litex.build.generic_platform import IOStandard, Pins, Subsignal from litex.soc.integration.soc_core import SoCCore from litex.soc.cores.clock import S7PLL, S7IDELAYCTRL from litex.soc.interconnect.csr import AutoCSR, Module, CSRStorage, CSRStatus from litedram.phy import s7ddrphy from litedram.modules import MT41K128M16 from liteeth.phy.mii import LiteEthPHYMII # Refer to `A7-constraints.xdc` for pin names. # IO with Subsignals make Record types, which have the name of the # subsignal as an attribute. io = [ ("dac_ss", 0, Pins("G13 D13 E15 J17 U12 U14 D4 E2"), IOStandard("LVCMOS33")), ("dac_mosi", 0, Pins("B11 B18 E16 J18 V12 V14 D3 D2"), IOStandard("LVCMOS33")), ("dac_miso", 0, Pins("A11 A18 D15 K15 V10 T13 F4 H2"), IOStandard("LVCMOS33")), ("dac_sck", 0, Pins("D12 K16 C15 J15 V11 U13 F3 G2"), IOStandard("LVCMOS33")), ("adc_conv", 0, Pins("V15 T11 N15 U18 U11 R10 R16 U17"), IOStandard("LVCMOS33")), ("adc_sck", 0, Pins("U16 R12 M16 R17 V16 R11 N16 T18"), IOStandard("LVCMOS33")), ("adc_sdo", 0, Pins("P14 T14 V17 P17 M13 R13 N14 R18"), IOStandard("LVCMOS33")) ] class Base(Module, AutoCSR): def __init__(self, clk, sdram): for i in range(0,8): setattr(self, f"dac_sel_{i}", CSRStorage(3)) setattr(self, f"dac_finished_{i}", CSRStatus(1)) setattr(self, f"dac_arm_{i}", CSRStorage(1)) setattr(self, f"from_dac_{i}", CSRStatus(24)) setattr(self, f"to_dac_{i}", CSRStorage(24)) setattr(self, f"wf_arm_{i}", CSRStorage(1)) setattr(self, f"wf_halt_on_finish_{i}", CSRStorage(1)), setattr(self, f"wf_finished_{i}", CSRStatus(1)), setattr(self, f"wf_time_to_wait_{i}", CSRStorage(16)) setattr(self, f"wf_refresh_start_{i}", CSRStorage(1)) setattr(self, f"wf_refresh_finished_{i}", CSRStatus(1)) setattr(self, f"wf_start_addr_{i}", CSRStorage(32)) port = sdram.crossbar.get_port() setattr(self, f"wf_sdram_{i}", LiteDRAMDMAReader(port)) setattr(self, f"adc_finished_{i}", CSRStatus(1)) setattr(self, f"adc_arm_{i}", CSRStorage(1)) setattr(self, f"from_adc_{i}", CSRStatus(32)) self.adc_sel_0 = CSRStorage(2) self.cl_in_loop = CSRStatus(1) self.cl_cmd = CSRStorage(64) self.cl_word_in = CSRStorage(32) self.cl_word_out = CSRStatus(32) self.cl_start_cmd = CSRStorage(1) self.cl_finish_cmd = CSRStatus(1) self.specials = Instance("base", i_clk(clk), .i_dac_miso(platform.request("dac_miso")), .o_dac_mosi(platform.request("dac_mosi")), .o_dac_sck(platform.request("dac_sck")), .o_dac_ss_L(platform.request("dac_ss_L")), .o_adc_conv(platform.request("adc_conv")), .i_adc_sdo(platform.request("adc_sdo")), .o_adc_sck(platform.request("adc_sck")), # dac_0 .i_dac_sel_0(self.dac_sel_0.storage), .o_dac_finished_0(self.dac_finished_0.status), .i_dac_arm_0(self.dac_arm_0.storage), .o_from_dac_0(self.from_dac_0.status), .i_to_dac_0(self.to_dac_0.storage), .i_wf_arm_0(self.wf_arm_0.storage), .i_wf_time_to_wait_0(self.wf_time_to_wait_0.storage), .i_wf_refresh_start_0(self.wf_refresh_start_0.storage), .o_wf_refresh_finished_0(self.wf_refresh_finished_0.status), .o_wf_start_addr_0(self.wf_start_addr_0.storage), .o_wf_ram_dma_addr_0(self.wf_sdram_0.sink.address), .i_wf_ram_word_0(self.wf_sdram_0.source.data), .o_wf_ram_read_0(self.wf_sdram_0.sink.valid), .i_wf_ram_valid_0(self.wf_sdram_0.source.valid), # dac_1 .i_dac_sel_1(self.dac_sel_1.storage), .o_dac_finished_1(self.dac_finished_1.status), .i_dac_arm_1(self.dac_arm_1.storage), .o_from_dac_1(self.from_dac_1.status), .i_to_dac_1(self.to_dac_1.storage), .i_wf_arm_1(self.wf_arm_1.storage), .i_wf_time_to_wait_1(self.wf_time_to_wait_1.storage), .i_wf_refresh_start_1(self.wf_refresh_start_1.storage), .o_wf_refresh_finished_1(self.wf_refresh_finished_1.status), .o_wf_start_addr_1(self.wf_start_addr_1.storage), .o_wf_ram_dma_addr_1(self.wf_sdram_1.sink.address), .i_wf_ram_word_1(self.wf_sdram_1.source.data), .o_wf_ram_read_1(self.wf_sdram_1.sink.valid), .i_wf_ram_valid_1(self.wf_sdram_1.source.valid), # dac_2 .i_dac_sel_2(self.dac_sel_2.storage), .o_dac_finished_2(self.dac_finished_2.status), .i_dac_arm_2(self.dac_arm_2.storage), .o_from_dac_2(self.from_dac_2.status), .i_to_dac_2(self.to_dac_2.storage), .i_wf_arm_2(self.wf_arm_2.storage), .i_wf_time_to_wait_2(self.wf_time_to_wait_2.storage), .i_wf_refresh_start_2(self.wf_refresh_start_2.storage), .o_wf_refresh_finished_2(self.wf_refresh_finished_2.status), .o_wf_start_addr_2(self.wf_start_addr_2.storage), .o_wf_ram_dma_addr_2(self.wf_sdram_2.sink.address), .i_wf_ram_word_2(self.wf_sdram_2.source.data), .o_wf_ram_read_2(self.wf_sdram_2.sink.valid), .i_wf_ram_valid_2(self.wf_sdram_2.source.valid), # dac_3 .i_dac_sel_3(self.dac_sel_3.storage), .o_dac_finished_3(self.dac_finished_3.status), .i_dac_arm_3(self.dac_arm_3.storage), .o_from_dac_3(self.from_dac_3.status), .i_to_dac_3(self.to_dac_3.storage), .i_wf_arm_3(self.wf_arm_3.storage), .i_wf_time_to_wait_3(self.wf_time_to_wait_3.storage), .i_wf_refresh_start_3(self.wf_refresh_start_3.storage), .o_wf_refresh_finished_3(self.wf_refresh_finished_3.status), .o_wf_start_addr_3(self.wf_start_addr_3.storage), .o_wf_ram_dma_addr_3(self.wf_sdram_3.sink.address), .i_wf_ram_word_3(self.wf_sdram_3.source.data), .o_wf_ram_read_3(self.wf_sdram_3.sink.valid), .i_wf_ram_valid_3(self.wf_sdram_3.source.valid), # dac_4 .i_dac_sel_4(self.dac_sel_4.storage), .o_dac_finished_4(self.dac_finished_4.status), .i_dac_arm_4(self.dac_arm_4.storage), .o_from_dac_4(self.from_dac_4.status), .i_to_dac_4(self.to_dac_4.storage), .i_wf_arm_4(self.wf_arm_4.storage), .i_wf_time_to_wait_4(self.wf_time_to_wait_4.storage), .i_wf_refresh_start_4(self.wf_refresh_start_4.storage), .o_wf_refresh_finished_4(self.wf_refresh_finished_4.status), .o_wf_start_addr_4(self.wf_start_addr_4.storage), .o_wf_ram_dma_addr_4(self.wf_sdram_4.sink.address), .i_wf_ram_word_4(self.wf_sdram_4.source.data), .o_wf_ram_read_4(self.wf_sdram_4.sink.valid), .i_wf_ram_valid_4(self.wf_sdram_4.source.valid), # dac_5 .i_dac_sel_5(self.dac_sel_5.storage), .o_dac_finished_5(self.dac_finished_5.status), .i_dac_arm_5(self.dac_arm_5.storage), .o_from_dac_5(self.from_dac_5.status), .i_to_dac_5(self.to_dac_5.storage), .i_wf_arm_5(self.wf_arm_5.storage), .i_wf_time_to_wait_5(self.wf_time_to_wait_5.storage), .i_wf_refresh_start_5(self.wf_refresh_start_5.storage), .o_wf_refresh_finished_5(self.wf_refresh_finished_5.status), .o_wf_start_addr_5(self.wf_start_addr_5.storage), .o_wf_ram_dma_addr_5(self.wf_sdram_5.sink.address), .i_wf_ram_word_5(self.wf_sdram_5.source.data), .o_wf_ram_read_5(self.wf_sdram_5.sink.valid), .i_wf_ram_valid_5(self.wf_sdram_5.source.valid), # dac_6 .i_dac_sel_6(self.dac_sel_6.storage), .o_dac_finished_6(self.dac_finished_6.status), .i_dac_arm_6(self.dac_arm_6.storage), .o_from_dac_6(self.from_dac_6.status), .i_to_dac_6(self.to_dac_6.storage), .i_wf_arm_6(self.wf_arm_6.storage), .i_wf_time_to_wait_6(self.wf_time_to_wait_6.storage), .i_wf_refresh_start_6(self.wf_refresh_start_6.storage), .o_wf_refresh_finished_6(self.wf_refresh_finished_6.status), .o_wf_start_addr_6(self.wf_start_addr_6.storage), .o_wf_ram_dma_addr_6(self.wf_sdram_6.sink.address), .i_wf_ram_word_6(self.wf_sdram_6.source.data), .o_wf_ram_read_6(self.wf_sdram_6.sink.valid), .i_wf_ram_valid_6(self.wf_sdram_6.source.valid), # dac_7 .i_dac_sel_7(self.dac_sel_7.storage), .o_dac_finished_7(self.dac_finished_7.status), .i_dac_arm_7(self.dac_arm_7.storage), .o_from_dac_7(self.from_dac_7.status), .i_to_dac_7(self.to_dac_7.storage), .i_wf_arm_7(self.wf_arm_7.storage), .i_wf_time_to_wait_7(self.wf_time_to_wait_7.storage), .i_wf_refresh_start_7(self.wf_refresh_start_7.storage), .o_wf_refresh_finished_7(self.wf_refresh_finished_7.status), .o_wf_start_addr_7(self.wf_start_addr_7.storage), .o_wf_ram_dma_addr_7(self.wf_sdram_7.sink.address), .i_wf_ram_word_7(self.wf_sdram_7.source.data), .o_wf_ram_read_7(self.wf_sdram_7.sink.valid), .i_wf_ram_valid_7(self.wf_sdram_7.source.valid), .i_adc_sel_0(self.adc_sel_0.storage), # adc_0 .o_adc_finished_0(self.adc_finished_0.status), .i_adc_arm_0(self.adc_arm_0.storage), .o_from_adc_0(self.from_adc_0.status), # adc_1 .o_adc_finished_1(self.adc_finished_1.status), .i_adc_arm_1(self.adc_arm_1.storage), .o_from_adc_1(self.from_adc_1.status), # adc_2 .o_adc_finished_2(self.adc_finished_2.status), .i_adc_arm_2(self.adc_arm_2.storage), .o_from_adc_2(self.from_adc_2.status), # adc_3 .o_adc_finished_3(self.adc_finished_3.status), .i_adc_arm_3(self.adc_arm_3.storage), .o_from_adc_3(self.from_adc_3.status), # adc_4 .o_adc_finished_4(self.adc_finished_4.status), .i_adc_arm_4(self.adc_arm_4.storage), .o_from_adc_4(self.from_adc_4.status), # adc_5 .o_adc_finished_5(self.adc_finished_5.status), .i_adc_arm_5(self.adc_arm_5.storage), .o_from_adc_5(self.from_adc_5.status), # adc_6 .o_adc_finished_6(self.adc_finished_6.status), .i_adc_arm_6(self.adc_arm_6.storage), .o_from_adc_6(self.from_adc_6.status), # adc_7 .o_adc_finished_7(self.adc_finished_7.status), .i_adc_arm_7(self.adc_arm_7.storage), .o_from_adc_7(self.from_adc_7.status), .o_cl_in_loop(self.cl_in_loop.status), .i_cl_cmd(self.cl_cmd.storage), .i_cl_word_in(self.cl_word_in.storage), .o_cl_word_out(self.cl_word_out.status), .i_cl_start_cmd(self.cl_start_cmd.storage), .o_cl_finish_cmd(self.cl_finish_cmd.status) ) # Clock and Reset Generator class _CRG(Module): def __init__(self, platform, sys_clk_freq, with_dram=True, with_rst=True): self.rst = Signal() self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_eth = ClockDomain() if with_dram: self.clock_domains.cd_sys4x = ClockDomain() self.clock_domains.cd_sys4x_dqs = ClockDomain() self.clock_domains.cd_idelay = ClockDomain() # Clk/Rst. clk100 = platform.request("clk100") rst = ~platform.request("cpu_reset") if with_rst else 0 # PLL. self.submodules.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(rst | self.rst) pll.register_clkin(clk100, 100e6) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_eth, 25e6) self.comb += platform.request("eth_ref_clk").eq(self.cd_eth.clk) platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. if with_dram: pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq) pll.create_clkout(self.cd_sys4x_dqs, 4*sys_clk_freq, phase=90) pll.create_clkout(self.cd_idelay, 200e6) # IdelayCtrl. if with_dram: self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay) class CryoSNOM1SoC(SoCCore): def __init__(self, variant): sys_clk_freq = int(100e6) platform = board_spec.Platform(variant=variant, toolchain="symbiflow") self.submodules.crg = _CRG(platform, sys_clk_freq, True) platform.add_source("rtl/spi/spi_switch.v") platform.add_source("rtl/spi/spi_master.v") platform.add_source("rtl/spi/spi_master_ss.v") platform.add_source("rtl/spi/spi_master_ss_no_write.v") platform.add_source("rtl/control_loop/sign_extend.v") platform.add_source("rtl/control_loop/intsat.v") platform.add_source("rtl/control_loop/boothmul.v") platform.add_source("rtl/control_loop/control_loop_math.v") platform.add_source("rtl/control_loop/control_loop.v") platform.add_source("rtl/control_loop/spi_switch.v") platform.add_source("rtl/waveform/waveform.v") platform.add_source("rtl/spi/base/base.v") # SoCCore does not have sane defaults (no integrated rom) SoCCore.__init__(self, clk_freq=sys_clk_freq, toolchain="symbiflow", platform = platform, bus_standard = "wishbone", ident = f"Arty-{variant} F4PGA LiteX VexRiscV Zephyr CryoSNOM1 0.1", bus_data_width = 32, bus_address_width = 32, bus_timeout = int(1e6), cpu_type = "vexriscv", integrated_rom_size=0x20000, integrated_sram_size = 0x2000, csr_data_width=32, csr_address_width=14, csr_paging=0x800, csr_ordering="big", timer_uptime = True) # This initializes the connection to the physical DRAM interface. self.submodules.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) # Synchronous dynamic ram. This is what controls all access to RAM. # This houses the "crossbar", which negotiates all RAM accesses to different # modules, including the verilog interfaces (waveforms etc.) self.add_sdram("sdram", phy = self.ddrphy, module = MT41K128M16(sys_clk_freq, "1:4"), l2_cache_size = 8192 ) self.submodules.ethphy = LiteEthPHYMII( clock_pads = platform.request("eth_clocks"), pads = platform.request("eth")) self.add_ethernet(phy=self.ethphy, dynamic_ip=True) # Add the DAC and ADC pins as GPIO. They will be used directly # by Zephyr. platform.add_extension(io) self.submodules.sdram = Base(ClockSignal(), self.sdram) def main(): soc = CryoSNOM1SoC("a7-35") builder = Builder(soc, csr_json="csr.json") builder.build() if __name__ == "__main__": main()