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boards/ulx3s: add sdcard pins and initial LiteSDCard integration.

This commit is contained in:
Florent Kermarrec 2020-06-03 14:36:33 +02:00
parent 997a17b933
commit fb4b6c35a3
2 changed files with 20 additions and 3 deletions
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7
litex/boards/platforms/ulx3s.py
View File

@ -34,6 +34,13 @@ _io = [
IOStandard("LVCMOS33"),
),
("sdcard", 0,
Subsignal("clk", Pins("J1")),
Subsignal("cmd", Pins("J3"), Misc("PULLMODE=UP")),
Subsignal("data", Pins("K2 K1 H2 H1"), Misc("PULLMODE=UP")),
IOStandard("LVCMOS33"), Misc("SLEW=FAST")
),
("sdram_clock", 0, Pins("F19"),
Misc("PULLMODE=NONE"),
Misc("DRIVE=4"),

16
litex/boards/targets/ulx3s.py
View File

@ -32,6 +32,7 @@ class _CRG(Module):
def __init__(self, platform, sys_clk_freq, with_usb_pll=False):
self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sys_ps = ClockDomain(reset_less=True)
self.clock_domains.cd_clk10 = ClockDomain() # FIXME: for initial LiteSDCard tests.
# # #
@ -45,7 +46,9 @@ class _CRG(Module):
pll.register_clkin(clk25, 25e6)
pll.create_clkout(self.cd_sys, sys_clk_freq)
pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=90)
self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll.locked | rst)
pll.create_clkout(self.cd_clk10, 10e6)
self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll.locked | rst)
self.specials += AsyncResetSynchronizer(self.cd_clk10, ~pll.locked | rst)
# USB PLL
if with_usb_pll:
@ -104,8 +107,10 @@ def main():
parser.add_argument("--load", action="store_true", help="Load bitstream")
parser.add_argument("--toolchain", default="trellis", help="Gateware toolchain to use, trellis (default) or diamond")
parser.add_argument("--device", dest="device", default="LFE5U-45F", help="FPGA device, ULX3S can be populated with LFE5U-45F (default) or LFE5U-85F")
parser.add_argument("--sys-clk-freq", default=50e6, help="System clock frequency (default=50MHz)")
parser.add_argument("--sdram-module", default="MT48LC16M16", help="SDRAM module: MT48LC16M16, AS4C32M16 or AS4C16M16 (default=MT48LC16M16)")
parser.add_argument("--sys-clk-freq", default=50e6, help="System clock frequency (default=50MHz)")
parser.add_argument("--sdram-module", default="MT48LC16M16", help="SDRAM module: MT48LC16M16, AS4C32M16 or AS4C16M16 (default=MT48LC16M16)")
parser.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support")
parser.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support")
builder_args(parser)
soc_sdram_args(parser)
trellis_args(parser)
@ -115,6 +120,11 @@ def main():
sys_clk_freq=int(float(args.sys_clk_freq)),
sdram_module_cls=args.sdram_module,
**soc_sdram_argdict(args))
assert not (args.with_spi_sdcard and args.with_sdcard)
if args.with_spi_sdcard:
soc.add_spi_sdcard()
if args.with_sdcard:
soc.add_sdcard()
builder = Builder(soc, **builder_argdict(args))
builder_kargs = trellis_argdict(args) if args.toolchain == "trellis" else {}
builder.build(**builder_kargs, run=args.build)