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ad9910: flake8 [nfc] 

Signed-off-by: Robert Jördens <rj@quartiq.de>
pull/1190/head
Robert Jördens 2018-11-05 19:44:51 +01:00
parent 6d525e2f9a
commit 832690af9a
1 changed files with 26 additions and 21 deletions
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47
artiq/coredevice/ad9910.py
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@ -2,7 +2,7 @@ from numpy import int32, int64
from artiq.language.core import (
kernel, delay, portable, delay_mu, now_mu, at_mu)
from artiq.language.units import us, ns, ms
from artiq.language.units import us, ms
from artiq.coredevice import spi2 as spi
from artiq.coredevice import urukul
@ -72,11 +72,12 @@ class AD9910:
set this to the delay tap number returned.
"""
kernel_invariants = {"chip_select", "cpld", "core", "bus",
"ftw_per_hz", "pll_n", "io_update_delay", "sysclk_per_mu"}
"ftw_per_hz", "pll_n", "io_update_delay",
"sysclk_per_mu"}
def __init__(self, dmgr, chip_select, cpld_device, sw_device=None,
pll_n=40, pll_cp=7, pll_vco=5, sync_delay_seed=-1,
io_update_delay=0):
pll_n=40, pll_cp=7, pll_vco=5, sync_delay_seed=-1,
io_update_delay=0):
self.cpld = dmgr.get(cpld_device)
self.core = self.cpld.core
self.bus = self.cpld.bus
@ -95,7 +96,7 @@ class AD9910:
assert self.sysclk_per_mu == sysclk*self.core.ref_period
assert 0 <= pll_vco <= 5
vco_min, vco_max = [(370, 510), (420, 590), (500, 700),
(600, 880), (700, 950), (820, 1150)][pll_vco]
(600, 880), (700, 950), (820, 1150)][pll_vco]
assert vco_min <= sysclk/1e6 <= vco_max
self.pll_vco = pll_vco
assert 0 <= pll_cp <= 7
@ -106,7 +107,9 @@ class AD9910:
@kernel
def set_phase_mode(self, phase_mode):
"""Sets the default phase mode for future calls to :meth:`set` and
"""Set the default phase mode.
for future calls to :meth:`set` and
:meth:`set_mu`. Supported phase modes are:
* :const:`PHASE_MODE_CONTINUOUS`: the phase accumulator is unchanged
@ -155,10 +158,10 @@ class AD9910:
:param data: Data to be written
"""
self.bus.set_config_mu(urukul.SPI_CONFIG, 8,
urukul.SPIT_DDS_WR, self.chip_select)
urukul.SPIT_DDS_WR, self.chip_select)
self.bus.write(addr << 24)
self.bus.set_config_mu(urukul.SPI_CONFIG | spi.SPI_END, 32,
urukul.SPIT_DDS_WR, self.chip_select)
urukul.SPIT_DDS_WR, self.chip_select)
self.bus.write(data)
@kernel
@ -168,11 +171,11 @@ class AD9910:
:param addr: Register address
"""
self.bus.set_config_mu(urukul.SPI_CONFIG, 8,
urukul.SPIT_DDS_WR, self.chip_select)
urukul.SPIT_DDS_WR, self.chip_select)
self.bus.write((addr | 0x80) << 24)
self.bus.set_config_mu(urukul.SPI_CONFIG | spi.SPI_END
| spi.SPI_INPUT, 32,
urukul.SPIT_DDS_RD, self.chip_select)
self.bus.set_config_mu(
urukul.SPI_CONFIG | spi.SPI_END | spi.SPI_INPUT,
32, urukul.SPIT_DDS_RD, self.chip_select)
self.bus.write(0)
return self.bus.read()
@ -185,13 +188,13 @@ class AD9910:
:param data_low: Low (LSB) 32 data bits
"""
self.bus.set_config_mu(urukul.SPI_CONFIG, 8,
urukul.SPIT_DDS_WR, self.chip_select)
urukul.SPIT_DDS_WR, self.chip_select)
self.bus.write(addr << 24)
self.bus.set_config_mu(urukul.SPI_CONFIG, 32,
urukul.SPIT_DDS_WR, self.chip_select)
urukul.SPIT_DDS_WR, self.chip_select)
self.bus.write(data_high)
self.bus.set_config_mu(urukul.SPI_CONFIG | spi.SPI_END, 32,
urukul.SPIT_DDS_WR, self.chip_select)
urukul.SPIT_DDS_WR, self.chip_select)
self.bus.write(data_low)
@kernel
@ -305,25 +308,25 @@ class AD9910:
@portable(flags={"fast-math"})
def frequency_to_ftw(self, frequency):
"""Returns the frequency tuning word corresponding to the given
"""Return the frequency tuning word corresponding to the given
frequency.
"""
return int32(round(self.ftw_per_hz*frequency))
@portable(flags={"fast-math"})
def turns_to_pow(self, turns):
"""Returns the phase offset word corresponding to the given phase
"""Return the phase offset word corresponding to the given phase
in turns."""
return int32(round(turns*0x10000))
@portable(flags={"fast-math"})
def amplitude_to_asf(self, amplitude):
"""Returns amplitude scale factor corresponding to given amplitude."""
"""Return amplitude scale factor corresponding to given amplitude."""
return int32(round(amplitude*0x3ffe))
@portable(flags={"fast-math"})
def pow_to_turns(self, pow):
"""Returns the phase in turns corresponding to a given phase offset
"""Return the phase in turns corresponding to a given phase offset
word."""
return pow/0x10000
@ -397,7 +400,8 @@ class AD9910:
@kernel
def clear_smp_err(self):
"""Clears the SMP_ERR flag and enables SMP_ERR validity monitoring.
"""Clear the SMP_ERR flag and enables SMP_ERR validity monitoring.
Violations of the SYNC_IN sample and hold margins will result in
SMP_ERR being asserted. This then also activates the red LED on
the respective Urukul channel.
@ -513,7 +517,8 @@ class AD9910:
d0 = self.io_update_delay
t0 = int32(self.measure_io_update_alignment(d0))
for i in range(max_delay - 1):
t = self.measure_io_update_alignment((d0 + i + 1) & (max_delay - 1))
t = self.measure_io_update_alignment(
(d0 + i + 1) & (max_delay - 1))
if t != t0:
return (d0 + i + period//2) & (period - 1)
raise ValueError("no IO_UPDATE-SYNC_CLK alignment edge found")