litex/milkymist/lm32/__init__.py

55 lines
1.3 KiB
Python

from migen.fhdl.structure import *
from migen.bus import wishbone
class LM32:
def __init__(self):
self.ibus = i = wishbone.Interface()
self.dbus = d = wishbone.Interface()
self.interrupt = Signal(BV(32))
self.ext_break = Signal()
self._inst = Instance("lm32_top",
[("I_ADR_O", BV(32)),
("I_DAT_O", i.dat_w),
("I_SEL_O", i.sel),
("I_CYC_O", i.cyc),
("I_STB_O", i.stb),
("I_WE_O", i.we),
("I_CTI_O", i.cti),
("I_LOCK_O", BV(1)),
("I_BTE_O", i.bte),
("D_ADR_O", BV(32)),
("D_DAT_O", d.dat_w),
("D_SEL_O", d.sel),
("D_CYC_O", d.cyc),
("D_STB_O", d.stb),
("D_WE_O", d.we),
("D_CTI_O", d.cti),
("D_LOCK_O", BV(1)),
("D_BTE_O", d.bte)],
[("interrupt", self.interrupt),
#("ext_break", self.ext_break),
("I_DAT_I", i.dat_r),
("I_ACK_I", i.ack),
("I_ERR_I", i.err),
("I_RTY_I", BV(1)),
("D_DAT_I", d.dat_r),
("D_ACK_I", d.ack),
("D_ERR_I", d.err),
("D_RTY_I", BV(1))],
[],
"clk_i",
"rst_i",
"lm32")
def get_fragment(self):
comb = [
self._inst.ins["I_RTY_I"].eq(0),
self._inst.ins["D_RTY_I"].eq(0),
self.ibus.adr.eq(self._inst.outs["I_ADR_O"][2:]),
self.dbus.adr.eq(self._inst.outs["D_ADR_O"][2:])
]
return Fragment(comb=comb, instances=[self._inst])