dsp: implement sawg features

This commit is contained in:
Robert Jördens 2016-11-17 02:36:49 +01:00
parent 98193d6fa1
commit 51f23feeac

View File

@ -1,354 +1,176 @@
from collections import namedtuple
from migen import *
from misoc.interconnect.stream import Endpoint
from misoc.cores.cordic import Cordic
from .accu import PhasedAccu, Accu
from .tools import eqh, Delay
from .tools import eqh, Delay, SatAddMixin
from .spline import Spline
class DDSFast(Module):
def __init__(self, width, parallelism=4):
a_width = width
p_width = width
f_width = 2*width
_Widths = namedtuple("_Widths", "t a p f")
_Orders = namedtuple("_Orders", "a p f")
self.o = [Signal((width, True)) for i in range(parallelism)]
self.width = width
class ParallelDDS(Module):
def __init__(self, widths, parallelism=1, a_delay=0):
self.i = Endpoint([("x", widths.a), ("y", widths.a),
("f", widths.f), ("p", widths.f), ("clr", 1)])
self.parallelism = parallelism
self.latency = 1 # will be accumulated
q = PhasedAccu(f_width, parallelism)
self.submodules += q
self.latency += q.latency
self.a = Endpoint([("a", a_width)])
self.f = Endpoint([("f", f_width)])
self.p = Endpoint([("p", p_width)])
self.i = [self.a, self.f, self.p]
self.widths = widths
###
a = Signal.like(self.a.a)
self.sync += [
If(self.a.stb,
a.eq(self.a.a)
),
If(self.f.stb,
eqh(q.i.f, self.f.f)
),
q.i.clr.eq(0),
If(self.p.stb,
eqh(q.i.p, self.p.p),
q.i.clr.eq(1)
),
q.i.stb.eq(self.f.stb | self.p.stb),
]
accu = PhasedAccu(widths.f, parallelism)
cordic = [Cordic(width=widths.a, widthz=widths.p, guard=None,
eval_mode="pipelined") for i in range(parallelism)]
self.xo = [c.xo for c in cordic]
self.yo = [c.yo for c in cordic]
a_delay += accu.latency
xy_delay = Delay(2*widths.a, max(0, a_delay))
z_delay = Delay(parallelism*widths.p, max(0, -a_delay))
self.submodules += accu, xy_delay, z_delay, cordic
self.latency = max(0, a_delay) + cordic[0].latency
self.gain = cordic[0].gain
self.comb += [
self.a.ack.eq(1),
self.f.ack.eq(1),
self.p.ack.eq(1),
q.o.ack.eq(1),
xy_delay.i.eq(Cat(self.i.x, self.i.y)),
z_delay.i.eq(Cat([zi[-widths.p:]
for zi in accu.o.payload.flatten()])),
eqh(accu.i.p, self.i.p),
accu.i.f.eq(self.i.f),
accu.i.clr.eq(self.i.clr),
accu.i.stb.eq(self.i.stb),
self.i.ack.eq(accu.i.ack),
accu.o.ack.eq(1),
[Cat(c.xi, c.yi).eq(xy_delay.o) for c in cordic],
Cat([c.zi for c in cordic]).eq(z_delay.o),
]
c = []
for i in range(parallelism):
ci = Cordic(width=width, widthz=p_width,
guard=None, eval_mode="pipelined")
self.submodules += ci
c.append(ci)
qoi = getattr(q.o, "z{}".format(i))
self.comb += [
eqh(ci.xi, a),
ci.yi.eq(0),
eqh(ci.zi, qoi),
eqh(self.o[i], ci.xo),
]
self.latency += c[0].latency
self.gain = c[0].gain
class DDSFast(Module):
def __init__(self, width, t_width=None,
a_width=None, p_width=None, f_width=None,
a_order=4, p_order=1, f_order=2, parallelism=8):
if t_width is None:
t_width = width
if a_width is None:
a_width = width + (a_order - 1)*t_width
if p_width is None:
p_width = width + (p_order - 1)*t_width
if f_width is None:
f_width = width + (f_order + 1)*t_width
a = Spline(order=a_order, width=a_width)
p = Spline(order=p_order, width=p_width)
f = Spline(order=f_order, width=f_width)
self.submodules += a, p, f
self.a = a.tri(t_width)
self.f = f.tri(t_width)
self.p = p.tri(t_width)
self.i = [self.a, self.f, self.p]
self.o = [[Signal((width, True)) for i in range(2)]
for i in range(parallelism)]
self.parallelism = parallelism
self.latency = 0 # will be accumulated
class SplineParallelDUC(ParallelDDS):
def __init__(self, widths, orders, **kwargs):
p = Spline(order=orders.p, width=widths.p)
f = Spline(order=orders.f, width=widths.f)
self.f = f.tri(widths.t)
self.p = p.tri(widths.t)
self.submodules += p, f
self.ce = Signal(reset=1)
self.clr = Signal()
super().__init__(widths._replace(p=len(self.f.a0), f=len(self.f.a0)),
**kwargs)
self.latency += f.latency
###
self.latency += p.latency
q = PhasedAccu(f_width, parallelism)
self.submodules += q
self.latency += q.latency
da = [Signal((width, True)) for i in range(q.latency)]
assert p.latency == f.latency
self.sync += [
If(q.i.stb & q.i.ack,
eqh(da[0], a.o.a0),
[da[i + 1].eq(da[i]) for i in range(len(da) - 1)],
),
If(p.o.stb & p.o.ack,
q.i.clr.eq(0),
),
If(p.i.stb & p.i.ack,
q.i.clr.eq(self.clr),
),
self.comb += [
p.o.ack.eq(self.ce),
f.o.ack.eq(self.ce),
eqh(self.i.f, f.o.a0),
eqh(self.i.p, p.o.a0),
self.i.clr.eq(self.clr),
self.i.stb.eq(p.o.stb & f.o.stb),
]
class SplineParallelDDS(SplineParallelDUC):
def __init__(self, widths, orders, **kwargs):
a = Spline(order=orders.a, width=widths.a)
self.a = a.tri(widths.t)
self.submodules += a
super().__init__(widths._replace(a=len(self.a.a0)),
orders, **kwargs)
###
self.comb += [
a.o.ack.eq(self.ce),
p.o.ack.eq(self.ce),
f.o.ack.eq(self.ce),
q.i.stb.eq(self.ce),
eqh(q.i.p, p.o.a0),
q.i.f.eq(f.o.a0),
q.o.ack.eq(1),
eqh(self.i.x, a.o.a0),
self.i.y.eq(0),
]
c = []
for i in range(parallelism):
ci = Cordic(width=width, widthz=p_width,
guard=None, eval_mode="pipelined")
self.submodules += ci
c.append(ci)
qoi = getattr(q.o, "z{}".format(i))
self.comb += [
ci.xi.eq(da[-1]),
ci.yi.eq(0),
eqh(ci.zi, qoi),
eqh(self.o[i][0], ci.xo),
eqh(self.o[i][1], ci.yo),
]
self.latency += c[0].latency
self.gain = c[0].gain
class DDSSlow(Module):
def __init__(self, width, t_width, a_width, p_width, f_width,
a_order=4, p_order=1, f_order=2):
a = Spline(order=a_order, width=a_width)
p = Spline(order=p_order, width=p_width)
f = Spline(order=f_order, width=f_width)
self.submodules += a, p, f
self.a = a.tri(t_width)
self.f = f.tri(t_width)
self.p = p.tri(t_width)
self.i = [self.a, self.f, self.p]
self.i_names = "a f p".split()
self.o = [Signal((width, True)) for i in range(2)]
self.ce = Signal()
self.clr = Signal()
self.latency = 0 # will be accumulated
###
self.latency += p.latency
q = Accu(f_width)
self.latency += q.latency
da = CEInserter()(Delay)(width, q.latency)
c = Cordic(width=width, widthz=p_width,
guard=None, eval_mode="pipelined")
self.latency += c.latency
self.gain = c.gain
self.submodules += q, da, c
self.sync += [
If(p.o.stb & p.o.ack,
q.i.clr.eq(0),
),
If(p.i.stb & p.i.ack,
q.i.clr.eq(self.clr),
),
]
self.comb += [
da.ce.eq(q.i.stb & q.i.ack),
a.o.ack.eq(self.ce),
p.o.ack.eq(self.ce),
f.o.ack.eq(self.ce),
q.i.stb.eq(self.ce),
eqh(da.i, a.o.a0),
eqh(q.i.p, p.o.a0),
q.i.f.eq(f.o.a0),
q.o.ack.eq(1),
c.xi.eq(da.o),
c.yi.eq(0),
eqh(c.zi, q.o.z),
eqh(self.o[0], c.xo),
eqh(self.o[1], c.yo),
]
class DDS(Module):
def __init__(self, width, t_width=None,
a_width=None, p_width=None, f_width=None,
a_order=4, p_order=1, f_order=2, parallelism=8):
if t_width is None:
t_width = width
if a_width is None:
a_width = width + (a_order - 1)*t_width
if p_width is None:
p_width = width + (p_order - 1)*t_width
if f_width is None:
f_width = width + (f_order + 1)*t_width
self.b = [DDSSlow(width, t_width, a_width, p_width, f_width, a_order,
p_order, f_order) for i in range(2)]
p = Spline(order=1, width=p_width)
f = Spline(order=1, width=f_width)
self.submodules += self.b, p, f
self.f0 = f.tri(t_width)
self.p0 = p.tri(t_width)
self.i = [self.f0, self.p0]
self.i_names = "f0 p0".split()
for i, bi in enumerate(self.b):
self.i += bi.i
for ii in bi.i_names:
self.i_names.append("{}{}".format(ii, i + 1))
for j in "afp":
setattr(self, "{}{}".format(j, i + 1), getattr(bi, j))
self.o = [[Signal((width, True)) for i in range(2)]
for i in range(parallelism)]
self.ce = Signal()
self.clr = Signal()
self.parallelism = parallelism
self.latency = 0 # will be accumulated
###
self.latency += self.b[0].latency # TODO: f0/p0, q.latency delta
q = PhasedAccu(f_width, parallelism)
self.submodules += q
self.sync += [
If(p.o.stb & p.o.ack,
q.i.clr.eq(0),
),
If(p.i.stb & p.i.ack,
q.i.clr.eq(self.clr),
),
]
self.comb += [
[bi.ce.eq(self.ce) for bi in self.b],
[bi.clr.eq(self.clr) for bi in self.b],
p.o.ack.eq(self.ce),
f.o.ack.eq(self.ce),
q.i.stb.eq(self.ce),
eqh(q.i.p, p.o.a0),
eqh(q.i.f, f.o.a0),
q.o.ack.eq(1),
]
x = self.sat_add(bi.o[0] for bi in self.b)
y = self.sat_add(bi.o[1] for bi in self.b)
c = []
for i in range(parallelism):
ci = Cordic(width=width, widthz=p_width,
guard=None, eval_mode="pipelined")
self.submodules += ci
c.append(ci)
qoi = getattr(q.o, "z{}".format(i))
self.comb += [
ci.xi.eq(x),
ci.yi.eq(y),
eqh(ci.zi, qoi),
eqh(self.o[i][0], ci.xo),
eqh(self.o[i][1], ci.yo),
]
self.latency += c[0].latency
self.gain = self.b[0].gain * c[0].gain
class Config(Module):
def __init__(self):
self.cfg = Record([("tap", 5), ("clr", 1), ("iq", 2)])
self.i = Endpoint(self.cfg.layout)
self.clr = Signal(4)
self.iq_en = Signal(2)
limit = [Signal((16, True)) for i in range(2*2)]
self.limit = [limit[i:i + 2] for i in range(0, len(limit), 2)]
self.i = Endpoint([("addr", bits_for(len(limit) + 2)), ("data", 16)])
self.ce = Signal()
###
n = Signal(1 << len(self.i.tap))
tap = Signal.like(self.i.tap)
clk = Signal()
clk0 = Signal()
div = Signal(16)
n = Signal.like(div)
reg = Array([Cat(self.clr, self.iq_en), Cat(div, n)] + self.limit)
self.comb += [
self.i.ack.eq(1),
clk.eq(Array(n)[tap]),
self.ce.eq(n == 0),
]
self.sync += [
clk0.eq(clk),
self.ce.eq(0),
If(clk0 ^ clk,
self.ce.eq(1),
n.eq(n - 1),
If(self.ce,
n.eq(div),
),
n.eq(n + 1),
If(self.i.stb,
n.eq(0),
self.cfg.eq(self.i.payload),
reg[self.i.addr].eq(self.i.data),
),
]
class Channel(Module):
def __init__(self, width=16, t_width=None, u_order=4, **kwargs):
if t_width is None:
t_width = width
du = Spline(width=width + (u_order - 1)*t_width, order=u_order)
da = DDS(width, t_width, **kwargs)
class Channel(Module, SatAddMixin):
def __init__(self, width=16, parallelism=4, widths=None, orders=None):
if orders is None:
orders = _Orders(a=4, f=2, p=1)
if widths is None:
widths = _Widths(t=width, a=orders.a*width, p=orders.p*width,
f=3*width + (orders.f - 1)*width)
cfg = Config()
self.submodules += du, da, cfg
self.i = [cfg.i, du.tri(t_width)] + da.i
self.i_names = "cfg u".split() + da.i_names
self.q_i = [Signal((width, True)) for i in range(da.parallelism)]
self.q_o = [ai[1] for ai in da.o]
self.o = [Signal((width, True)) for i in range(da.parallelism)]
self.width = width
self.parallelism = da.parallelism
self.latency = da.latency + 1
self.cordic_gain = da.gain
a1 = SplineParallelDDS(widths, orders)
a2 = SplineParallelDDS(widths, orders)
b = SplineParallelDUC(widths, orders, parallelism=parallelism,
a_delay=-a1.latency)
u = Spline(width=widths.a, order=orders.a)
du = Delay(widths.a, a1.latency + b.latency - u.latency)
self.submodules += cfg, a1, a2, b, u, du
self.cfg = cfg.i
self.u = u.tri(widths.t)
self.i = [self.cfg, self.u, a1.a, a1.f, a1.p, a2.a, a2.f, a2.p, b.f, b.p]
self.y_in = [Signal((width, True)) for i in range(b.parallelism)]
self.y_out = b.yo
self.o = [Signal((width, True)) for i in range(b.parallelism)]
self.widths = widths
self.orders = orders
self.parallelism = parallelism
self.latency = a1.latency + b.latency + 1
self.cordic_gain = a1.gain*b.gain
###
# delay du to match da
ddu = Delay((width, True), da.latency - du.latency)
self.submodules += ddu
self.comb += [
ddu.i.eq(du.o.a0[-width:]),
da.clr.eq(cfg.cfg.clr),
da.ce.eq(cfg.ce),
du.o.ack.eq(cfg.ce),
a1.ce.eq(cfg.ce),
a2.ce.eq(cfg.ce),
b.ce.eq(cfg.ce),
u.o.ack.eq(cfg.ce),
Cat(a1.clr, a2.clr, b.clr).eq(cfg.clr),
b.i.x.eq(self.sat_add([a1.xo[0], a2.xo[0]])),
b.i.y.eq(self.sat_add([a1.yo[0], a2.yo[0]])),
eqh(du.i, u.o.a0),
]
# wire up outputs and q_{i,o} exchange
for oi, ai, qi in zip(self.o, da.o, self.q_i):
for o, x, y in zip(self.o, b.xo, self.y_in):
self.sync += [
oi.eq(self.sat_add([
ddu.o +
# du.o.a0[-width:],
Mux(cfg.cfg.iq[0], ai[0], 0),
Mux(cfg.cfg.iq[1], qi, 0)])),
o.eq(self.sat_add([du.o,
Mux(cfg.iq_en[0], x, 0),
Mux(cfg.iq_en[1], y, 0)])),
]
def connect_q(self, buddy):
for i, qi in enumerate(self.q_i):
self.comb += qi.eq(buddy.q_o[i])
def connect_q_from(self, buddy):
self.comb += Cat(self.y_in).eq(Cat(buddy.y_out))