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ad53xx: style [nfc]

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This commit is contained in:
Robert Jördens 2018-03-24 14:10:20 +01:00
parent 68e433a3a8
commit 08326c5727
1 changed files with 5 additions and 2 deletions
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7
artiq/coredevice/ad53xx.py
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@ -13,6 +13,7 @@ from artiq.language.core import (kernel, portable, delay_mu, delay, now_mu,
from artiq.language.units import ns
from artiq.coredevice import spi2 as spi
SPI_AD53XX_CONFIG = (0*spi.SPI_OFFLINE | 1*spi.SPI_END |
0*spi.SPI_INPUT | 0*spi.SPI_CS_POLARITY |
0*spi.SPI_CLK_POLARITY | 1*spi.SPI_CLK_PHASE |
@ -67,7 +68,7 @@ def ad53xx_cmd_read_ch(channel, op):
a 32-bit integer, ready to be transferred directly by the SPI core.
"""
return (AD53XX_CMD_SPECIAL | AD53XX_SPECIAL_READ | op |
(((channel & 0x3f) + 8) << 7)) << 8
(((channel & 0x3f) + 8) << 7)) << 8
@portable
@ -82,6 +83,7 @@ def voltage_to_mu(voltage, offset_dacs=8192, vref=5.):
"""
return int(round(0x10000*(voltage/(4.*vref)) + offset_dacs*0x4))
@portable
def offset_to_mu(voltage, offset_dacs=8192, vref=5.):
"""Returns the offset register value required to produce a given voltage
@ -96,6 +98,7 @@ def offset_to_mu(voltage, offset_dacs=8192, vref=5.):
"""
return int(round(0x10000*(voltage/(4.*vref)) + offset_dacs*0x4))
class AD53xx:
"""Analog devices AD53[67][0123] family of multi-channel Digital to Analog
Converters.
@ -252,7 +255,7 @@ class AD53xx:
This method advances the timeline by two RTIO clock periods.
"""
self.ldac.off()
delay_mu(2*self.bus.ref_period_mu) # t13 = 10ns ldac pulse width low
delay_mu(2*self.bus.ref_period_mu) # t13 = 10ns ldac pulse width low
self.ldac.on()
@kernel