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Merge remote-tracking branch 'origin/master' into new

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This commit is contained in:
Sebastien Bourdeauducq 2018-11-08 20:21:56 +08:00
commit c990b5e4f1
5 changed files with 80 additions and 63 deletions
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67
artiq/coredevice/ad9910.py
View File

@ -414,48 +414,55 @@ class AD9910:
self.cpld.io_update.pulse(1*us)
@kernel
def tune_sync_delay(self, sync_delay_seed):
def tune_sync_delay(self, search_seed=15):
"""Find a stable SYNC_IN delay.
This method first locates the smallest SYNC_IN validity window at
minimum window size and then increases the window a bit to provide some
slack and stability.
This method first locates a valid SYNC_IN delay at zero validation
window size (setup/hold margin) by scanning around `search_seed`. It
then looks for similar valid delays at successively larger validation
window sizes until none can be found. It then deacreses the validation
window a bit to provide some slack and stability and returns the
optimal values.
It starts scanning delays around `sync_delay_seed` (see the
device database arguments and :class:`AD9910`) at maximum validation
window size and decreases the window size until a valid delay is found.
:param sync_delay_seed: Start value for valid SYNC_IN delay search.
:param search_seed: Start value for valid SYNC_IN delay search.
Defaults to 15 (half range).
:return: Tuple of optimal delay and window size.
"""
dt = 14 # 1/(f_SYSCLK*75ps) taps per SYSCLK period
max_delay = dt # 14*75ps > 1ns
max_window = dt//4 + 1 # 2*75ps*4 = 600ps high > 1ns/2
min_window = max(0, max_window - 2) # 2*75ps hold, 2*75ps setup
for window in range(max_window - min_window + 1):
window = max_window - window
for in_delay in range(max_delay):
# alternate search direction around seed_delay
search_span = 31
# FIXME https://github.com/sinara-hw/Urukul/issues/16
# should both be 2-4 once kasli sync_in jitter is identified
min_window = 0
margin = 1 # 1*75ps setup and hold
for window in range(16):
next_seed = -1
for in_delay in range(search_span - 2*window):
# alternate search direction around search_seed
if in_delay & 1:
in_delay = -in_delay
in_delay = sync_delay_seed + (in_delay >> 1)
if in_delay < 0:
in_delay = 0
elif in_delay > 31:
in_delay = 31
in_delay = search_seed + (in_delay >> 1)
if in_delay < 0 or in_delay > 31:
continue
self.set_sync(in_delay, window)
self.clear_smp_err()
# integrate SMP_ERR statistics for a few hundred cycles
delay(10*us)
delay(100*us)
err = urukul_sta_smp_err(self.cpld.sta_read())
err = (err >> (self.chip_select - 4)) & 1
delay(40*us) # slack
if not err:
window -= min_window # add margin
self.set_sync(in_delay, window)
self.clear_smp_err()
delay(40*us) # slack
return in_delay, window
if not (err >> (self.chip_select - 4)) & 1:
next_seed = in_delay
break
if next_seed >= 0: # valid delay found, scan next window
search_seed = next_seed
continue
elif window > min_window:
# no valid delay found here, roll back and add margin
window = max(min_window, window - 1 - margin)
self.set_sync(search_seed, window)
self.clear_smp_err()
delay(100*us) # slack
return search_seed, window
else:
break
raise ValueError("no valid window/delay")
@kernel

36
artiq/examples/kasli_basic/device_db_ptb2.py
View File

@ -87,36 +87,42 @@ device_db.update({
"class": "SPIMaster",
"arguments": {"channel": 27}
},
"ttl_urukul0_io_update": {
"ttl_urukul0_sync": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 28}
"class": "TTLClockGen",
"arguments": {"channel": 28, "acc_width": 4}
},
"ttl_urukul0_sw0": {
"ttl_urukul0_io_update": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 29}
},
"ttl_urukul0_sw1": {
"ttl_urukul0_sw0": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 30}
},
"ttl_urukul0_sw2": {
"ttl_urukul0_sw1": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 31}
},
"ttl_urukul0_sw3": {
"ttl_urukul0_sw2": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 32}
},
"ttl_urukul0_sw3": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 33}
},
"urukul0_cpld": {
"type": "local",
"module": "artiq.coredevice.urukul",
@ -150,19 +156,19 @@ device_db.update({
"type": "local",
"module": "artiq.coredevice.spi2",
"class": "SPIMaster",
"arguments": {"channel": 33}
"arguments": {"channel": 34}
},
"ttl_urukul1_sync": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLClockGen",
"arguments": {"channel": 34, "acc_width": 4}
"arguments": {"channel": 35, "acc_width": 4}
},
"ttl_urukul1_io_update": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 35}
"arguments": {"channel": 36}
},
"urukul1_cpld": {
"type": "local",
@ -197,13 +203,13 @@ device_db.update({
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 36}
"arguments": {"channel": 37}
},
"led1": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 37}
"arguments": {"channel": 38}
}
})
@ -213,19 +219,19 @@ device_db.update({
"type": "local",
"module": "artiq.coredevice.spi2",
"class": "SPIMaster",
"arguments": {"channel": 38}
"arguments": {"channel": 39}
},
"ttl_zotino0_ldac": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 39}
"arguments": {"channel": 40}
},
"ttl_zotino0_clr": {
"type": "local",
"module": "artiq.coredevice.ttl",
"class": "TTLOut",
"arguments": {"channel": 40}
"arguments": {"channel": 41}
},
"zotino0": {
"type": "local",

2
artiq/firmware/ksupport/lib.rs
View File

@ -352,7 +352,7 @@ extern fn dma_record_output_wide(timestamp: i64, target: i32, words: CSlice<i32>
assert!(words.len() <= 16); // enforce the hardware limit
unsafe {
let mut data = dma_record_output_prepare(timestamp, target, 1);
let mut data = dma_record_output_prepare(timestamp, target, words.len());
for word in words.as_ref().iter() {
data[..4].copy_from_slice(&[
(word >> 0) as u8,

30
artiq/gateware/targets/kasli.py
View File

@ -34,38 +34,39 @@ class _RTIOCRG(Module, AutoCSR):
clk_synth = platform.request("si5324_clkout_fabric")
clk_synth_se = Signal()
clk_synth_buffered = Signal()
platform.add_period_constraint(clk_synth.p, 8.0)
self.specials += [
Instance("IBUFGDS",
p_DIFF_TERM="TRUE", p_IBUF_LOW_PWR="TRUE",
p_DIFF_TERM="TRUE", p_IBUF_LOW_PWR="FALSE",
i_I=clk_synth.p, i_IB=clk_synth.n, o_O=clk_synth_se),
Instance("BUFG", i_I=clk_synth_se, o_O=clk_synth_buffered),
]
pll_locked = Signal()
rtio_clk = Signal()
rtiox4_clk = Signal()
ext_clkout_clk = Signal()
fb_clk = Signal()
self.specials += [
Instance("PLLE2_ADV",
p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked,
p_REF_JITTER1=0.01,
p_BANDWIDTH="HIGH",
p_REF_JITTER1=0.001,
p_CLKIN1_PERIOD=8.0, p_CLKIN2_PERIOD=8.0,
i_CLKIN2=clk_synth_buffered,
i_CLKIN2=clk_synth_se,
# Warning: CLKINSEL=0 means CLKIN2 is selected
i_CLKINSEL=0,
# VCO @ 1GHz when using 125MHz input
p_CLKFBOUT_MULT=8, p_DIVCLK_DIVIDE=1,
i_CLKFBIN=self.cd_rtio.clk,
# VCO @ 1.5GHz when using 125MHz input
p_CLKFBOUT_MULT=12, p_DIVCLK_DIVIDE=1,
i_CLKFBIN=fb_clk,
i_RST=self.pll_reset.storage,
o_CLKFBOUT=rtio_clk,
o_CLKFBOUT=fb_clk,
p_CLKOUT0_DIVIDE=2, p_CLKOUT0_PHASE=0.0,
o_CLKOUT0=rtiox4_clk),
p_CLKOUT0_DIVIDE=3, p_CLKOUT0_PHASE=0.0,
o_CLKOUT0=rtiox4_clk,
p_CLKOUT1_DIVIDE=12, p_CLKOUT1_PHASE=0.0,
o_CLKOUT1=rtio_clk),
Instance("BUFG", i_I=rtio_clk, o_O=self.cd_rtio.clk),
Instance("BUFG", i_I=rtiox4_clk, o_O=self.cd_rtiox4.clk),
@ -598,7 +599,8 @@ class PTB2(_StandaloneBase):
eem.DIO.add_std(self, 2,
ttl_serdes_7series.Output_8X, ttl_serdes_7series.Output_8X)
eem.Sampler.add_std(self, 3, None, ttl_serdes_7series.Output_8X)
eem.Urukul.add_std(self, 5, 4, ttl_serdes_7series.Output_8X)
eem.Urukul.add_std(self, 5, 4, ttl_serdes_7series.Output_8X,
ttl_simple.ClockGen)
eem.Urukul.add_std(self, 6, None, ttl_serdes_7series.Output_8X,
ttl_simple.ClockGen)

8
artiq/test/coredevice/test_ad9910.py
View File

@ -81,8 +81,10 @@ class AD9910Exp(EnvExperiment):
self.sync_scan(err, win=i)
print(err)
self.core.break_realtime()
dly, win = self.dev.tune_sync_delay(self.dev.sync_delay_seed)
self.sync_scan(err, win=win + 1) # tighten window by 2*75ps
dly, win = self.dev.tune_sync_delay()
self.sync_scan(err, win=win)
# FIXME: win + 1 # tighten window by 2*75ps
# after https://github.com/sinara-hw/Urukul/issues/16
self.set_dataset("dly", dly)
self.set_dataset("win", win)
self.set_dataset("err", err)
@ -92,7 +94,7 @@ class AD9910Exp(EnvExperiment):
for in_delay in range(len(err)):
self.dev.set_sync(in_delay=in_delay, window=win)
self.dev.clear_smp_err()
delay(10*us) # integrate SMP_ERR statistics
# delay(10*us) # integrate SMP_ERR statistics
e = urukul_sta_smp_err(self.dev.cpld.sta_read())
err[in_delay] = (e >> (self.dev.chip_select - 4)) & 1
delay(50*us) # slack