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trellis: Add option to select SPI mode. 

This allows a significant speedup when booting large bitstreams on ECP5
boards that support dual or quad SPI operation.
This commit is contained in:
Owen Kirby 2020-07-11 11:48:10 -07:00
parent e76464167b
commit 0aec5b0f8c
1 changed files with 9 additions and 4 deletions
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13
litex/build/lattice/trellis.py
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@ -118,10 +118,10 @@ _build_template = [
"yosys -l {build_name}.rpt {build_name}.ys",
"nextpnr-ecp5 --json {build_name}.json --lpf {build_name}.lpf --textcfg {build_name}.config \
--{architecture} --package {package} --speed {speed_grade} {timefailarg} {ignoreloops} --seed {seed}",
"ecppack {build_name}.config --svf {build_name}.svf --bit {build_name}.bit --bootaddr {bootaddr}"
"ecppack {build_name}.config --svf {build_name}.svf --bit {build_name}.bit --bootaddr {bootaddr} --spimode {spimode}"
]
def _build_script(source, build_template, build_name, architecture, package, speed_grade, timingstrict, ignoreloops, bootaddr, seed):
def _build_script(source, build_template, build_name, architecture, package, speed_grade, timingstrict, ignoreloops, bootaddr, seed, spimode):
if sys.platform in ("win32", "cygwin"):
script_ext = ".bat"
script_contents = "@echo off\nrem Autogenerated by LiteX / git: " + tools.get_litex_git_revision() + "\n\n"
@ -142,7 +142,8 @@ def _build_script(source, build_template, build_name, architecture, package, spe
ignoreloops = "--ignore-loops" if ignoreloops else "",
bootaddr = bootaddr,
fail_stmt = fail_stmt,
seed = seed)
seed = seed,
spimode = spimode)
script_file = "build_" + build_name + script_ext
tools.write_to_file(script_file, script_contents, force_unix=False)
@ -190,6 +191,7 @@ class LatticeTrellisToolchain:
ignoreloops = False,
bootaddr = 0,
seed = 1,
spimode = "fast-read",
**kwargs):
# Create build directory
@ -221,7 +223,7 @@ class LatticeTrellisToolchain:
# Generate build script
script = _build_script(False, self.build_template, build_name, architecture, package,
speed_grade, timingstrict, ignoreloops, bootaddr, seed)
speed_grade, timingstrict, ignoreloops, bootaddr, seed, spimode)
# Run
if run:
_run_script(script)
@ -249,6 +251,8 @@ def trellis_args(parser):
help="ignore combinational loops in timing analysis, i.e. pass '--ignore-loops' to nextpnr")
parser.add_argument("--ecppack-bootaddr", default=0,
help="Set boot address for next image, i.e. pass '--bootaddr xxx' to ecppack")
parser.add_argument("--ecppack-spimode", default="fast-read",
help="Set slave SPI programming mode")
parser.add_argument("--nextpnr-seed", default=1, type=int,
help="seed to pass to nextpnr")
@ -258,5 +262,6 @@ def trellis_argdict(args):
"timingstrict": args.nextpnr_timingstrict,
"ignoreloops": args.nextpnr_ignoreloops,
"bootaddr": args.ecppack_bootaddr,
"spimode": args.ecppack_spimdoe,
"seed": args.nextpnr_seed,
}