---
migen/build/lattice/icestorm.py | 126 ++++++++++++++++++++++++++++++++++++++
migen/build/lattice/platform.py | 5 +-
migen/build/lattice/programmer.py | 7 +++
3 files changed, 137 insertions(+), 1 deletion(-)
create mode 100644 migen/build/lattice/icestorm.py
diff --git a/migen/build/lattice/icestorm.py b/migen/build/lattice/icestorm.py
new file mode 100644
index 0000000..1ab1d93
--- /dev/null
+++ b/migen/build/lattice/icestorm.py
@@ -0,0 +1,126 @@
+# This file is Copyright (c) 2015 William D. Jones <thor0...@comcast.net>
+# License: BSD
+
+import os
+import sys
+import subprocess
+
+from migen.fhdl.structure import _Fragment
+
+from migen.build.generic_platform import *
+from migen.build import tools
+from migen.build.lattice import common
+
+
+def _format_constraint(c):
+ pass
+
+
+def _format_pcf(signame, pin, others, resname):
+ return "set_io " + signame + " " + pin + "\n"
+
+
+def _build_pcf(named_sc, named_pc):
+ r = ""
+ for sig, pins, others, resname in named_sc:
+ if len(pins) > 1:
+ for i, p in enumerate(pins):
+ r += _format_pcf(sig + "[" + str(i) + "]", p, others, resname)
+ else:
+ r += _format_pcf(sig, pins[0], others, resname)
+ if named_pc:
+ r += "\n" + "\n\n".join(named_pc)
+ return r
+
+
+def _build_yosys(device, sources, vincpaths, build_name):
+ ys_contents = ""
+ incflags = ""
+ for path in vincpaths:
+ incflags += " -I" + path
+ for filename, language, library in sources:
+ ys_contents += "read_{}{} {}\n".format(language, incflags, filename)
+
+ ys_contents += """synth_ice40 -top top -blif
{build_name}.blif""".format(build_name=build_name)
+
+ ys_name = build_name + ".ys"
+ tools.write_to_file(ys_name, ys_contents)
+
+
+def _run_icestorm(build_name, source, yosys_opt, pnr_opt, icepack_opt):
+ if sys.platform == "win32" or sys.platform == "cygwin":
+ source_cmd = "call "
+ script_ext = ".bat"
+ shell = ["cmd", "/c"]
+ build_script_contents = "@echo off\nrem Autogenerated by Migen\n"
+ fail_stmt = " || exit /b"
+ else:
+ source_cmd = "source "
+ script_ext = ".sh"
+ shell = ["bash"]
+ build_script_contents = "# Autogenerated by Migen\nset -e\n"
+ fail_stmt = ""
+
+ build_script_contents += """
+yosys {yosys_opt} {build_name}.ys
+arachne-pnr {pnr_opt} -p {build_name}.pcf {build_name}.blif -o
{build_name}.txt{fail_stmt}
+icepack {icepack_opt} {build_name}.txt {build_name}.bin{fail_stmt}
+"""
+ build_script_contents = build_script_contents.format(build_name=build_name,
+ yosys_opt=yosys_opt, pnr_opt=pnr_opt, icepack_opt=icepack_opt,
+ fail_stmt=fail_stmt)
+ build_script_file = "build_" + build_name + script_ext
+ tools.write_to_file(build_script_file, build_script_contents,
force_unix=False)
+ command = shell + [build_script_file]
+ r = subprocess.call(command)
+ if r != 0:
+ raise OSError("Subprocess failed")
+
+
+class LatticeIceStormToolchain:
+ def __init__(self):
+ self.yosys_opt = "-q"
+ self.pnr_opt = ""
+ self.icepack_opt = ""
+
+ # platform.device should be of the form "ice40-{1k,8k}-{tq144, etc}""
+ def build(self, platform, fragment, build_dir="build", build_name="top",
+ run=True):
+ tools.mkdir_noerror(build_dir)
+ cwd = os.getcwd()
+ os.chdir(build_dir)
+
+ if not isinstance(fragment, _Fragment):
+ fragment = fragment.get_fragment()
+ platform.finalize(fragment)
+
+ v_output = platform.get_verilog(fragment)
+ named_sc, named_pc = platform.resolve_signals(v_output.ns)
+ v_file = build_name + ".v"
+ v_output.write(v_file)
+ sources = platform.sources | {(v_file, "verilog", "work")}
+ _build_yosys(platform.device, sources, platform.verilog_include_paths,
build_name)
+
+ tools.write_to_file(build_name + ".pcf", _build_pcf(named_sc,
named_pc))
+ if run:
+ (family, size, package) = self.parse_device_string(platform.device)
+ new_pnr_opts = self.pnr_opt + " -d " + size + " -P " + package
+ _run_icestorm(build_name, False, self.yosys_opt, new_pnr_opts,
+ self.icepack_opt)
+
+ os.chdir(cwd)
+
+ return v_output.ns
+
+ def parse_device_string(self, device_str):
+ (family, size, package) = device_str.split("-")
+ if family not in ["ice40"]:
+ raise ValueError("Unknown device family")
+ if size not in ["1k", "8k"]:
+ raise ValueError("Invalid device size")
+ if package not in ["tq144", "ct256"]:
+ raise ValueError("Invalid device package")
+ return (family, size, package)
+
+ def add_period_constraint(self, platform, clk, period):
+ pass
diff --git a/migen/build/lattice/platform.py b/migen/build/lattice/platform.py
index 7374223..50fc4e4 100644
--- a/migen/build/lattice/platform.py
+++ b/migen/build/lattice/platform.py
@@ -1,5 +1,5 @@
from migen.build.generic_platform import GenericPlatform
-from migen.build.lattice import common, diamond
+from migen.build.lattice import common, diamond, icestorm
class LatticePlatform(GenericPlatform):
@@ -9,6 +9,9 @@ class LatticePlatform(GenericPlatform):
GenericPlatform.__init__(self, *args, **kwargs)
if toolchain == "diamond":
self.toolchain = diamond.LatticeDiamondToolchain()
+ elif toolchain == "icestorm":
+ self.bitstream_ext = ".bin"
+ self.toolchain = icestorm.LatticeIceStormToolchain()
else:
raise ValueError("Unknown toolchain")
diff --git a/migen/build/lattice/programmer.py
b/migen/build/lattice/programmer.py
index cc3c50b..2f091ab 100644
--- a/migen/build/lattice/programmer.py
+++ b/migen/build/lattice/programmer.py
@@ -52,3 +52,10 @@ class LatticeProgrammer(GenericProgrammer):
xcf_content = _xcf_template.format(bitstream_file=bitstream_file)
tools.write_to_file(xcf_file, xcf_content)
subprocess.call(["pgrcmd", "-infile", xcf_file])
+
+
+class IceStormProgrammer(GenericProgrammer):
+ needs_bitreverse = False
+
+ def flash(self, address, data_file):
+ subprocess.call(["iceprog", "-o", str(address), data_file])
--
2.6.3
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