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wrpll: add test to compare collector+filter against Matlab simulation

This commit is contained in:
hartytp 2020-10-08 15:36:21 +08:00 committed by Sebastien Bourdeauducq
parent d780faf4ac
commit cd8c2ce713
1 changed files with 87 additions and 0 deletions

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@ -1,3 +1,5 @@
import numpy as np
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from migen.genlib.cdc import MultiReg, PulseSynchronizer
@ -148,3 +150,88 @@ class WRPLL(Module, AutoCSR):
self.main_dcxo.adpll_stb.eq(self.filter_main.output_stb),
self.main_dcxo.adpll.eq(self.filter_main.output + self.adpll_offset_main.storage)
]
def helper_sim(N=15):
class WRPLL(Module):
def __init__(self, N):
self.tag_ref = Signal(N)
self.input_stb = Signal()
self.adpll = Signal((24, True))
self.out_stb = Signal()
# # # #
loop_filter = thls.make(filters.helper, data_width=48)
self.submodules.loop_filter = loop_filter
self.submodules.collector = collector = Collector(N)
self.comb += [
self.collector.tag_ref.eq(self.tag_ref),
self.collector.ref_stb.eq(self.input_stb),
self.collector.main_stb.eq(self.input_stb),
self.loop_filter.input.eq(self.collector.out_helper << 22),
self.loop_filter.input_stb.eq(self.collector.out_stb),
self.adpll.eq(self.loop_filter.output),
self.out_stb.eq(self.loop_filter.output_stb),
]
pll = WRPLL(N=N)
# check filter against output from MatLab model
initial_helper_out = -8000
ref_tags = np.array([
24778, 16789, 8801, 814, 25596, 17612, 9628, 1646,
26433, 18453, 10474, 2496, 27287, 19311, 11337, 3364, 28160,
20190, 12221, 4253, 29054, 21088, 13124, 5161, 29966, 22005,
14045, 6087, 30897, 22940, 14985, 7031, 31847, 23895, 15944,
7995, 47, 24869, 16923, 8978, 1035, 25861, 17920, 9981,
2042, 26873, 18937, 11002, 3069, 27904, 19973, 12042, 4113,
28953, 21026, 13100, 5175, 30020, 22098, 14177, 6257, 31106,
23189, 15273, 7358, 32212, 24300, 16388, 8478, 569, 25429,
17522, 9617, 1712, 26577, 18675, 10774, 2875, 27745, 19848,
11951, 4056, 28930, 21038, 13147, 5256, 30135, 22247, 14361,
6475, 31359, 23476, 15595, 7714, 32603, 24725, 16847, 8971,
1096
])
adpll_sim = np.array([
8, 24, 41, 57, 74, 91, 107, 124, 140, 157, 173,
190, 206, 223, 239, 256, 273, 289, 306, 322, 339, 355,
372, 388, 405, 421, 438, 454, 471, 487, 504, 520, 537,
553, 570, 586, 603, 619, 636, 652, 668, 685, 701, 718,
734, 751, 767, 784, 800, 817, 833, 850, 866, 882, 899,
915, 932, 948, 965, 981, 998, 1014, 1030, 1047, 1063, 1080,
1096, 1112, 1129, 1145, 1162, 1178, 1194, 1211, 1227, 1244, 1260,
1276, 1293, 1309, 1326, 1342, 1358, 1375, 1391, 1407, 1424, 1440,
1457, 1473, 1489, 1506, 1522, 1538, 1555, 1571, 1587, 1604, 1620,
1636])
def sim():
yield pll.collector.out_helper.eq(initial_helper_out)
for ref_tag, adpll_matlab in zip(ref_tags, adpll_sim):
# feed collector
yield pll.tag_ref.eq(int(ref_tag))
yield pll.input_stb.eq(1)
yield
yield pll.input_stb.eq(0)
while not (yield pll.collector.out_stb):
yield
tag_diff = yield pll.collector.out_helper
while not (yield pll.loop_filter.output_stb):
yield
adpll_migen = yield pll.adpll
print("ref tag diff: {}, migen sim adpll {}, matlab adpll {}"
.format(tag_diff, adpll_migen, adpll_matlab))
assert adpll_migen == adpll_matlab
yield
run_simulation(pll, [sim()])
if __name__ == "__main__":
helper_sim()