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ad53xx->ad5360 and refactor

This commit is contained in:
Robert Jördens 2016-03-04 00:00:25 +01:00
parent dc6d116824
commit 669fbaa4f1
3 changed files with 100 additions and 71 deletions
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95
artiq/coredevice/ad5360.py Normal file
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@ -0,0 +1,95 @@
from artiq.language.core import kernel, portable, delay
from artiq.language.units import ns
from artiq.coredevice import spi
_AD5360_SPI_CONFIG = (0*spi.SPI_OFFLINE | 0*spi.SPI_CS_POLARITY |
0*spi.SPI_CLK_POLARITY | 1*spi.SPI_CLK_PHASE |
0*spi.SPI_LSB_FIRST | 0*spi.SPI_HALF_DUPLEX)
_AD5360_CMD_DATA = 3 << 22
_AD5360_CMD_OFFSET = 2 << 22
_AD5360_CMD_GAIN = 1 << 22
_AD5360_CMD_SPECIAL = 0 << 22
@portable
def _AD5360_WRITE_CHANNEL(c):
return (c + 8) << 16
_AD5360_SPECIAL_NOP = 0 << 16
_AD5360_SPECIAL_CONTROL = 1 << 16
_AD5360_SPECIAL_OFS0 = 2 << 16
_AD5360_SPECIAL_OFS1 = 3 << 16
_AD5360_SPECIAL_READ = 3 << 16
@portable
def _AD5360_READ_CHANNEL(ch):
return (ch + 8) << 7
_AD5360_READ_X1A = 0x000 << 7
_AD5360_READ_X1B = 0x040 << 7
_AD5360_READ_OFFSET = 0x080 << 7
_AD5360_READ_GAIN = 0x0c0 << 7
_AD5360_READ_CONTROL = 0x101 << 7
_AD5360_READ_OFS0 = 0x102 << 7
_AD5360_READ_OFS1 = 0x103 << 7
class AD5360:
"""
Support for the Analog devices AD53[67][0123]
multi-channel Digital to Analog Converters
"""
def __init__(self, dmgr, spi_bus, ldac=None, chip_select=0):
self.core = dmgr.get("core")
self.bus = dmgr.get(spi_bus)
if ldac is not None:
ldac = dmgr.get(ldac)
self.ldac = ldac
self.chip_select = chip_select
@kernel
def setup_bus(self, write_div=4, read_div=7):
# write: 2*8ns >= 10ns = t_6 (clk falling to cs_n rising)
# read: 4*8*ns >= 25ns = t_22 (clk falling to miso valid)
self.bus.set_config_mu(_AD5360_SPI_CONFIG, write_div, read_div)
self.bus.set_xfer(self.chip_select, 24, 0)
@kernel
def write_offsets(self, value=0x1fff):
value &= 0x3fff
self.bus.write((_AD5360_CMD_SPECIAL | _AD5360_SPECIAL_OFS0 | value
) << 8)
self.bus.write((_AD5360_CMD_SPECIAL | _AD5360_SPECIAL_OFS1 | value
) << 8)
@kernel
def write_channel(self, channel=0, value=0, op=_AD5360_CMD_DATA):
channel &= 0x3f
value &= 0xffff
self.bus.write((op | _AD5360_WRITE_CHANNEL(channel) | value) << 8)
@kernel
def write_channels(self, values, first=0, op=_AD5360_CMD_DATA):
for i in range(len(values)):
self.write_channel(i + first, values[i], op)
@kernel
def read_channel_sync(self, channel=0, op=_AD5360_READ_X1A):
channel &= 0x3f
self.bus.write((_AD5360_CMD_SPECIAL | _AD5360_SPECIAL_READ | op |
_AD5360_READ_CHANNEL(channel)) << 8)
self.bus.set_xfer(self.chip_select, 0, 24)
self.bus.write((_AD5360_CMD_SPECIAL | _AD5360_SPECIAL_NOP) << 8)
self.bus.read_async()
self.bus.set_xfer(self.chip_select, 24, 0)
return self.bus.input_async() & 0xffff
@kernel
def load(self):
self.ldac.off()
delay(24*ns)
self.ldac.on()

71
artiq/coredevice/ad53xx.py
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@ -1,71 +0,0 @@
from artiq.language.core import (kernel, portable, delay, delay_mu, int)
from artiq.language.units import ns
from artiq.coredevice import spi
_AD53xx_SPI_CONFIG = (0*spi.SPI_OFFLINE | 0*spi.SPI_CS_POLARITY |
0*spi.SPI_CLK_POLARITY | 0*spi.SPI_CLK_PHASE |
0*spi.SPI_LSB_FIRST | 0*spi.SPI_HALF_DUPLEX)
_AD53xx_MODE_WRITE_X1 = 3 << 22
_AD53xx_MODE_WRITE_C = 2 << 22
_AD53xx_MODE_WRITE_M = 1 << 22
_AD53xx_MODE_SPECIAL = 0 << 22
_AD53xx_GROUP = portable(lambda g: ((g + 1) << 19))
_AD53xx_GROUP_ALL = 0 << 19
_AD53xx_GROUP_01234 = 6 << 19
_AD53xx_GROUP_1234 = 7 << 19
_AD53xx_CHANNEL_ALL = 0 << 16
_AD53xx_CHANNEL = portable(lambda g: g << 16)
_AD53xx_SPECIAL_NOP = 0 << 16
_AD53xx_SPECIAL_CONTROL = 1 << 16
_AD53xx_SPECIAL_OFS0 = 2 << 16
_AD53xx_SPECIAL_OFS1 = 3 << 16
_AD53xx_SPECIAL_AB_SELECT = portable(lambda i: (i + 6) << 16)
_AD53xx_SPECIAL_AB_SELECT_ALL = 11 << 16
_AD53xx_READ_X1A = portable(lambda ch: (0x00 | (ch + 8)) << 7)
_AD53xx_READ_X1B = portable(lambda ch: (0x40 | (ch + 8)) << 7)
_AD53xx_READ_C = portable(lambda ch: (0x80 | (ch + 8)) << 7)
_AD53xx_READ_M = portable(lambda ch: (0xc0 | (ch + 8)) << 7)
_AD53xx_READ_CONTROL = 0x101 << 7
_AD53xx_READ_OFS0 = 0x102 << 7
_AD53xx_READ_OFS1 = 0x103 << 7
_AD53xx_READ_AB_SELECT = portable(lambda i: (0x100 + (i + 6)) << 7)
class AD53xx:
def __init__(self, dmgr, spi_bus, ldac=None,
chip_select=0, write_div=4, read_div=6):
self.core = dmgr.get("core")
self.bus = dmgr.get(spi_bus)
if ldac is not None:
ldac = dmgr.get(ldac)
self.ldac = ldac
self.chip_select = chip_select
self.write_div = write_div
self.read_div = read_div
@kernel
def bus_setup(self):
self.bus.set_config_mu(_AD53xx_SPI_CONFIG, self.write_div,
self.read_div)
self.bus.set_xfer(self.chip_select, 24, 0)
@kernel
def _channel_address(self, channel=0):
return int((channel + 8) << 16)
@kernel
def write_x1(self, channel=0, value=0):
ch = self._channel_address(channel)
self.bus.write(_AD53xx_MODE_WRITE_X1 | ch | value)
delay_mu(int(self.bus.xfer_period_mu + self.bus.write_period_mu))
@kernel
def load(self):
self.ldac.off()
delay(20*ns)
self.ldac.on()

5
doc/manual/core_drivers_reference.rst
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@ -30,6 +30,11 @@ These drivers are for the core device and the peripherals closely integrated int
.. automodule:: artiq.coredevice.spi
:members:
:mod:`artiq.coredevice.ad5360` module
-------------------------------------
.. automodule:: artiq.coredevice.ad5360
:members:
:mod:`artiq.coredevice.exceptions` module
-----------------------------------------