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liteusb: make oe_n optional on ft2232h phy

This commit is contained in:
Florent Kermarrec 2015-03-22 10:56:56 +01:00
parent ed5746a1fe
commit c77562f44b
1 changed files with 10 additions and 5 deletions
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15
misoclib/com/liteusb/phy/ft2232h.py
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@ -3,7 +3,7 @@ from migen.flow.actor import *
from migen.actorlib.fifo import AsyncFIFO from migen.actorlib.fifo import AsyncFIFO
from migen.fhdl.specials import * from migen.fhdl.specials import *
from liteusb.ftdi.std import * from misoclib.com.liteusb.common import *
class FtdiPHY(Module): class FtdiPHY(Module):
def __init__(self, pads, fifo_depth=32, read_time=16, write_time=16): def __init__(self, pads, fifo_depth=32, read_time=16, write_time=16):
@ -100,7 +100,12 @@ class FtdiPHY(Module):
data_r = Signal(dw) data_r = Signal(dw)
data_oe = Signal() data_oe = Signal()
pads.oe_n.reset = 1 if hasattr(pads, "oe_n"):
pads_oe_n = pads.oe_n
else:
pads_oe_n = Signal()
pads_oe_n.reset = 1
pads.rd_n.reset = 1 pads.rd_n.reset = 1
pads.wr_n.reset = 1 pads.wr_n.reset = 1
@ -108,14 +113,14 @@ class FtdiPHY(Module):
If(fsm.ongoing("READ"), If(fsm.ongoing("READ"),
data_oe.eq(0), data_oe.eq(0),
pads.oe_n.eq(0), pads_oe_n.eq(0),
pads.rd_n.eq(~wants_read), pads.rd_n.eq(~wants_read),
pads.wr_n.eq(1) pads.wr_n.eq(1)
).Elif(fsm.ongoing("WRITE"), ).Elif(fsm.ongoing("WRITE"),
data_oe.eq(1), data_oe.eq(1),
pads.oe_n.eq(1), pads_oe_n.eq(1),
pads.rd_n.eq(1), pads.rd_n.eq(1),
pads.wr_n.eq(~wants_write), pads.wr_n.eq(~wants_write),
@ -124,7 +129,7 @@ class FtdiPHY(Module):
).Else( ).Else(
data_oe.eq(1), data_oe.eq(1),
pads.oe_n.eq(~fsm.ongoing("WTR")), pads_oe_n.eq(~fsm.ongoing("WTR")),
pads.rd_n.eq(1), pads.rd_n.eq(1),
pads.wr_n.eq(1) pads.wr_n.eq(1)
), ),