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import os
import subprocess
from nmigen.build import *
from nmigen.vendor.lattice_ecp5 import *
from .resources import *
__all__ = ["ECP55GEVNPlatform"]
class ECP55GEVNPlatform(LatticeECP5Platform):
device = "LFE5UM5G-85F"
package = "BG381"
speed = "8"
default_clk = "clk12"
default_rst = "rst"
def __init__(self, *, VCCIO1="2V5", VCCIO6="3V3", **kwargs):
"""
VCCIO1 is connected by default to 2.5 V via R100 (can be set to 3.3 V by disconnecting
R100 and connecting R105)
VCCIO6 is connected to 3.3 V by default via R99 (can be switched to 2.5 V with R104,
see page 51 in the ECP5-5G-EVN datasheet)
"""
super().__init__(**kwargs)
assert VCCIO1 in ("3V3", "2V5")
assert VCCIO6 in ("3V3", "2V5")
self._VCCIO1 = VCCIO1
self._VCCIO6 = VCCIO6
def _vccio_to_iostandard(self, vccio):
if vccio == "2V5":
return "LVCMOS25"
if vccio == "3V3":
return "LVCMOS33"
assert False
def bank1_iostandard(self):
return self._vccio_to_iostandard(self._VCCIO1)
def bank6_iostandard(self):
return self._vccio_to_iostandard(self._VCCIO6)
resources = [
Resource("rst", 0, PinsN("G2", dir="i"), Attrs(IO_TYPE="LVCMOS33")),
Resource("clk12", 0, Pins("A10", dir="i"),
Clock(12e6), Attrs(IO_TYPE="LVCMOS33")),
*LEDResources(pins="A13 A12 B19 A18 B18 C17 A17 B17", invert=True,
attrs=Attrs(IO_TYPE=bank1_iostandard)),
*ButtonResources(pins="P4", invert=True,
attrs=Attrs(IO_TYPE=bank6_iostandard)),
*SwitchResources(pins={1: "J1", 2: "H1", 3: "K1"}, invert=True,
attrs=Attrs(IO_TYPE=bank6_iostandard)),
*SwitchResources(pins={4: "E15", 5: "D16", 6: "B16", 7: "C16", 8: "A16"}, invert=True,
attrs=Attrs(IO_TYPE=bank1_iostandard)),
Resource("serdes", 0,
Subsignal("tx", DiffPairs("W4", "W5", dir="o")),
Subsignal("rx", DiffPairs("Y5", "Y6", dir="i")),
),
Resource("serdes", 1,
Subsignal("tx", DiffPairs("W8", "W9", dir="o")),
Subsignal("rx", DiffPairs("Y7", "Y8", dir="i")),
),
Resource("serdes", 2,
Subsignal("tx", DiffPairs("W13", "W14", dir="o")),
Subsignal("rx", DiffPairs("Y14", "Y15", dir="i")),
),
Resource("serdes", 3,
Subsignal("tx", DiffPairs("W17", "W18", dir="o")),
Subsignal("rx", DiffPairs("Y16", "Y17", dir="i")),
),
Resource("serdes_clk", 0, DiffPairs("Y11", "Y12", dir="i")),
Resource("serdes_clk", 1, DiffPairs("Y19", "W20", dir="i")), # 200 MHz
# TODO: add other resources
]
connectors = [
# TODO: add connectors
]
@property
def file_templates(self):
return {
**super().file_templates,
"{{name}}-openocd.cfg": r"""
interface ftdi
ftdi_device_desc "Lattice ECP5 Evaluation Board"
ftdi_vid_pid 0x0403 0x6010
ftdi_channel 0
ftdi_layout_init 0xfff8 0xfffb
reset_config none
adapter_khz 25000
jtag newtap ecp5 tap -irlen 8 -expected-id 0x81113043
"""
}
def toolchain_program(self, products, name):
openocd = os.environ.get("OPENOCD", "openocd")
with products.extract("{}-openocd.cfg".format(name), "{}.svf".format(name)) \
as (config_filename, vector_filename):
subprocess.check_call([openocd,
"-f", config_filename,
"-c", "transport select jtag; init; svf -quiet {}; exit".format(vector_filename)
])
if __name__ == "__main__":
from .test.blinky import *
ECP55GEVNPlatform().build(Blinky(), do_program=True)
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