srenblad
/
artiq
forked from M-Labs/artiq
1
0
Fork 0
Code Pull Requests Activity

sawg: cleanup

This commit is contained in:
Robert Jördens 2016-11-29 23:16:32 +01:00
parent fb58f31c9d
commit ed6d1e73cc
2 changed files with 59 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
artiq/coredevice/sawg.py
View File

@ -1,7 +1,7 @@
from numpy import int32, int64
from artiq.language.core import kernel, now_mu, portable, delay
from artiq.coredevice.rtio import rtio_output, rtio_output_wide
from artiq.language.types import TInt32, TInt64, TFloat, TList
from artiq.language.types import TInt32, TInt64, TFloat
class Spline:
@ -44,18 +44,18 @@ class Spline:
"""
rtio_output(now_mu(), self.channel, 0, self.to_mu(value))
@kernel
@kernel(flags={"fast-math"})
def set64(self, value: TFloat):
"""Set spline value.
:param value: Spline value relative to full-scale.
"""
v = self.to_mu64(value)
l = [int32(v), int32(v >> 32)]
l = [int32(0)] * 2
self.pack_coeff_mu([self.to_mu64(value)], l)
rtio_output_wide(now_mu(), self.channel, 0, l)
@kernel
def set_coeff_mu(self, value):
def set_coeff_mu(self, value): # TList(TInt32)
"""Set spline raw values.
:param value: Spline packed raw values.
@ -63,7 +63,7 @@ class Spline:
rtio_output_wide(now_mu(), self.channel, 0, value)
@portable(flags={"fast-math"})
def pack_coeff_mu(self, coeff, packed):
def pack_coeff_mu(self, coeff, packed): # TList(TInt64), TList(TInt32)
pos = 0
for i in range(len(coeff)):
wi = self.width + i*self.time_width
@ -74,13 +74,16 @@ class Spline:
avail = 32 - used
if avail > wi:
avail = wi
packed[j] |= int32(ci & ((1 << avail) - 1)) << used
cij = int32(ci)
if avail != 32:
cij &= (1 << avail) - 1
packed[j] |= cij << used
ci >>= avail
wi -= avail
pos += avail
@portable(flags={"fast-math"})
def coeff_to_mu(self, coeff, coeff64):
def coeff_to_mu(self, coeff, coeff64): # TList(TFloat), TList(TInt64)
for i in range(len(coeff)):
vi = coeff[i] * self.scale
for j in range(i):
@ -94,18 +97,31 @@ class Spline:
coeff64[2] += ci >> self.time_width
coeff64[1] += ci // 6 >> 2*self.time_width
@kernel
def set_coeff(self, value):
def coeff_as_packed_mu(self, coeff64):
n = len(coeff64)
width = n*self.width + (n - 1)*n//2*self.time_width
packed = [int32(0)] * ((width + 31)//32)
self.pack_coeff_mu(coeff64, packed)
return packed
def coeff_as_packed(self, coeff):
coeff64 = [int64(0)] * len(coeff)
self.coeff_to_mu(coeff, coeff64)
return self.coeff_as_packed_mu(coeff64)
@kernel(flags={"fast-math"})
def set_coeff(self, coeff): # TList(TFloat)
"""Set spline coefficients.
:param value: List of floating point spline knot coefficients,
lowest order (constant) coefficient first.
lowest order (constant) coefficient first. Units are the
unit of this spline's value times increasing powers of 1/s.
"""
n = len(value)
width = n*self.width + (n - 1)*n//2*self.time_width
n = len(coeff)
coeff64 = [int64(0)] * n
self.coeff_to_mu(coeff, coeff64)
width = n*self.width + (n - 1)*n//2*self.time_width
packed = [int32(0)] * ((width + 31)//32)
self.coeff_to_mu(value, coeff64)
self.pack_coeff_mu(coeff64, packed)
self.set_coeff_mu(packed)
@ -132,15 +148,15 @@ class Spline:
and 3 are valid: step, linear, cubic.
"""
if order == 0:
delay(duration/2)
delay(duration/2.)
self.set_coeff([stop])
delay(duration/2)
delay(duration/2.)
elif order == 1:
self.set_coeff([start, (stop - start)/duration])
delay(duration)
elif order == 3:
v2 = 6*(stop - start)/(duration*duration)
self.set_coeff([start, 0., v2, -2*v2/duration])
v2 = 6.*(stop - start)/(duration*duration)
self.set_coeff([start, 0., v2, -2.*v2/duration])
delay(duration)
else:
raise ValueError("Invalid interpolation order. "
@ -153,14 +169,14 @@ class SAWG:
oscillators = exp(2j*pi*(frequency0*t + phase0))*(
amplitude1*exp(2j*pi*(frequency1*t + phase1)) +
amplitude2*exp(2j*pi*(frequency2*t + phase2))
amplitude2*exp(2j*pi*(frequency2*t + phase2)))
output = (offset +
i_enable*Re(oscillators) +
q_enable*Im(buddy_oscillators))
Where:
* offset, amplitude1, amplitude1: in units of full scale
* offset, amplitude1, amplitude2: in units of full scale
* phase0, phase1, phase2: in units of turns
* frequency0, frequency1, frequency2: in units of Hz
@ -184,13 +200,13 @@ class SAWG:
self.amplitude1 = Spline(width, time_width, channel_base + 2,
self.core, 1/(2*cordic_gain**2))
self.frequency1 = Spline(3*width, time_width, channel_base + 3,
self.core, 1/self.core.coarse_ref_period)
self.core, self.core.coarse_ref_period)
self.phase1 = Spline(width, time_width, channel_base + 4,
self.core, 1.)
self.amplitude2 = Spline(width, time_width, channel_base + 5,
self.core, 1/(2*cordic_gain**2))
self.frequency2 = Spline(3*width, time_width, channel_base + 6,
self.core, 1/self.core.coarse_ref_period)
self.core, self.core.coarse_ref_period)
self.phase2 = Spline(width, time_width, channel_base + 7,
self.core, 1.)
self.frequency0 = Spline(2*width, time_width, channel_base + 8,

54
artiq/test/gateware/test_sawg_fe.py
View File

@ -110,13 +110,9 @@ class SAWGTest(unittest.TestCase):
# [.1, .01, -.00001], [.1, .01, .00001, -.000000001]
for v in [-.1], [.1, -.01]:
ch = self.driver.offset
q = [0] * len(v)
ch.coeff_to_mu(v, q)
n = len(v)
p = ch.coeff_as_packed(v)
t = ch.time_width
w = ch.width
p = [0] * ((n*w + (n - 1)*n//2*t + 31)//32)
ch.pack_coeff_mu(q, p)
p = [_ & 0xffffffff for _ in p]
p0 = [int(round(vi*ch.scale*ch.time_scale**i))
for i, vi in enumerate(v)]
@ -143,30 +139,19 @@ class SAWGTest(unittest.TestCase):
self.assertEqual(out[i], [v, v])
self.assertEqual(out[-1], [0, 0])
def pack(self, v):
n = len(v)
ch = self.driver.offset
t = ch.time_width
w = ch.width
p = [0] * ((n*w + (n - 1)*n//2*t + 31)//32)
ch.pack_coeff_mu(v, p)
p = [_ & 0xffffffff for _ in p]
return p
def test_pack(self):
self.assertEqual(self.pack([1]), [1])
self.assertEqual(self.pack([1, 1 << 16]), [1, 1])
self.assertEqual(self.pack([1, 1 << 32]), [1, 0])
self.assertEqual(self.pack([0x1234, 0xa5a5a5a5]),
ch = self.driver.offset
self.assertEqual(ch.coeff_as_packed_mu([1]), [1])
self.assertEqual(ch.coeff_as_packed_mu([1, 1 << 16]), [1, 1])
self.assertEqual(ch.coeff_as_packed_mu([1, 1 << 32]), [1, 0])
self.assertEqual(ch.coeff_as_packed_mu([0x1234, 0xa5a5a5a5]),
[0xa5a51234, 0xa5a5])
self.assertEqual(self.pack([1, 2, 3, 4]),
self.assertEqual(ch.coeff_as_packed_mu([1, 2, 3, 4]),
[0x20001, 0x30000, 0, 4, 0])
self.assertEqual(self.pack([-1, -2, -3, -4]),
[0xfffeffff, 0xfffdffff, 0xffffffff,
0xfffffffc, 0xffffffff])
self.assertEqual(self.pack([0, -1, 0, -1]),
[0xffff0000, 0x0000ffff, 0,
0xffffffff, 0xffffffff])
self.assertEqual(ch.coeff_as_packed_mu([-1, -2, -3, -4]),
[0xfffeffff, 0xfffdffff, -1, -4, -1])
self.assertEqual(ch.coeff_as_packed_mu([0, -1, 0, -1]),
[0xffff0000, 0x0000ffff, 0, -1, -1])
def test_smooth_linear(self):
ch = self.driver.offset
@ -190,11 +175,13 @@ class SAWGTest(unittest.TestCase):
delay_mu(1)
out = self.run_channel(self.rtio_manager.outputs)
out = sum(out, [])
# import matplotlib.pyplot as plt
# plt.plot(out)
# plt.show()
if False:
import matplotlib.pyplot as plt
plt.plot(out)
plt.show()
@unittest.skip("needs sim.time.TimeManager tweak for timeline jumps")
# @unittest.skip("needs artiq.sim.time.TimeManager tweak for "
# "reverse timeline jumps")
def test_demo_2tone(self):
MHz = 1e-3
ns = 1.
@ -227,6 +214,7 @@ class SAWGTest(unittest.TestCase):
out = self.run_channel(self.rtio_manager.outputs)
out = sum(out, [])
# import matplotlib.pyplot as plt
# plt.plot(out)
# plt.show()
if True:
import matplotlib.pyplot as plt
plt.plot(out)
plt.show()