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devices/novatech409b: convert to asyncserial
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parent
7657b67ea6
commit
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@ -1,10 +1,10 @@
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# Written by Joe Britton, 2015
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import time
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import math
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import logging
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import asyncio
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import serial
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import asyncserial
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logger = logging.getLogger(__name__)
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@ -41,22 +41,28 @@ class Novatech409B:
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self.simulation = True
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else:
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self.simulation = False
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self.port = serial.serial_for_url(
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self.port = asyncserial.AsyncSerial(
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serial_dev,
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baudrate=19200,
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bytesize=8,
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parity="N",
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stopbits=1,
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xonxoff=0,
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timeout=1.0)
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self.setup()
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xonxoff=0)
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def close(self):
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"""Close the serial port."""
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if not self.simulation:
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self.port.close()
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def _ser_send(self, cmd, get_response=True):
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async def _ser_readline(self):
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c = await self.port.read(1)
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r = c
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while c != b"\n":
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c = await self.port.read(1)
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r += c
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return r
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async def _ser_send(self, cmd, get_response=True):
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"""Send a string to the serial port."""
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# Low-level routine for sending serial commands to device. It sends
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@ -67,48 +73,42 @@ class Novatech409B:
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if self.simulation:
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logger.info("simulation _ser_send(\"%s\")", cmd)
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else:
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self.port.flushInput()
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self.port.write((cmd + "\r\n").encode())
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result = self.port.readline().rstrip().decode()
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logger.debug("_ser_send(\"%s\")", cmd)
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self.port.ser.reset_input_buffer()
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await self.port.write((cmd + "\r\n").encode())
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if get_response:
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result = (await self._ser_readline()).rstrip().decode()
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logger.debug("got response from device: %s", result)
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if result == "OK":
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pass
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elif result == "":
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raise UnexpectedResponse("Response from device timed out")
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else:
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try:
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errstr = self.error_codes[result]
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except KeyError:
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errstr = "Unrecognized reply: '{}'".format(result)
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s = "Error Code = {ec}, {ecs}".format(
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if result != "OK":
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errstr = self.error_codes.get(result, "Unrecognized reply")
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s = "Erroneous reply from device: {ec}, {ecs}".format(
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ec=result, ecs=errstr)
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raise UnexpectedResponse(s)
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raise ValueError(s)
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else:
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pass
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def reset(self):
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async def reset(self):
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"""Hardware reset of 409B."""
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self._ser_send("R", get_response=False)
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time.sleep(1)
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self.setup()
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await self._ser_send("R", get_response=False)
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await asyncio.sleep(1)
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await self.setup()
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def setup(self):
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async def setup(self):
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"""Initial setup of 409B."""
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# Setup the Novatech 409B with the following defaults:
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# * command echo off ("E d")
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# * external clock ("") 10 MHz sinusoid -1 to +7 dBm
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self._ser_send("E d", get_response=False)
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self.set_phase_continuous(True)
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self.set_simultaneous_update(False)
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await self._ser_send("E d", get_response=False)
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await self.set_phase_continuous(True)
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await self.set_simultaneous_update(False)
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def save_state_to_eeprom(self):
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async def save_state_to_eeprom(self):
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"""Save current state to EEPROM."""
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self._ser_send("S")
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await self._ser_send("S")
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def set_phase_continuous(self, is_continuous):
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async def set_phase_continuous(self, is_continuous):
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"""Toggle phase continuous mode.
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Sends the "M n" command. This turns off the automatic
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@ -120,11 +120,11 @@ class Novatech409B:
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:param is_continuous: True or False
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"""
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if is_continuous:
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self._ser_send("M n")
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await self._ser_send("M n")
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else:
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self._ser_send("M a")
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await self._ser_send("M a")
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def set_simultaneous_update(self, simultaneous):
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async def set_simultaneous_update(self, simultaneous):
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"""Set simultaneous update mode.
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Sends the "I m" command. In this mode an update
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@ -134,29 +134,29 @@ class Novatech409B:
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simultaneously.
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"""
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if simultaneous:
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self._ser_send("I m")
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await self._ser_send("I m")
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else:
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self._ser_send("I a")
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await self._ser_send("I a")
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def do_simultaneous_update(self):
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async def do_simultaneous_update(self):
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"""Apply update in simultaneous update mode."""
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self._ser_send("I p")
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await self._ser_send("I p")
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def set_freq(self, ch_no, freq):
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async def set_freq(self, ch_no, freq):
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"""Set frequency of one channel."""
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# Novatech expects MHz
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self._ser_send("F{:d} {:f}".format(ch_no, freq/1e6))
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await self._ser_send("F{:d} {:f}".format(ch_no, freq/1e6))
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def set_phase(self, ch_no, phase):
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async def set_phase(self, ch_no, phase):
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"""Set phase of one channel."""
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# phase word is required by device
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# N is an integer from 0 to 16383. Phase is set to
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# N*360/16384 deg; in ARTIQ represent phase in cycles [0, 1]
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phase_word = round(phase*16383)
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cmd = "P{:d} {:d}".format(ch_no, phase_word)
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self._ser_send(cmd)
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await self._ser_send(cmd)
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def set_gain(self, ch_no, volts):
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async def set_gain(self, ch_no, volts):
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"""Set amplitude of one channel."""
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# due to error in Novatech it doesn't generate an error for
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@ -167,9 +167,9 @@ class Novatech409B:
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raise ValueError(s)
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s = "V{:d} {:d}".format(ch_no, dac_value)
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self._ser_send(s)
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await self._ser_send(s)
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def get_status(self):
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async def get_status(self):
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if self.simulation:
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return ["00989680 2000 01F5 0000 00000000 00000000 000301",
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"00989680 2000 01F5 0000 00000000 00000000 000301",
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@ -177,17 +177,19 @@ class Novatech409B:
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"00989680 2000 01F5 0000 00000000 00000000 000301",
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"80 BC0000 0000 0102 21"]
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else:
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# status message is multi-line
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self.port.flushInput()
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self.port.write(("QUE" + "\r\n").encode())
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result = self.port.readlines()
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result = [r.rstrip().decode() for r in result]
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self.port.reset_input_buffer()
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await self.port.write(("QUE" + "\r\n").encode())
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for i in range(5):
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m = (await self._ser_readline()).rstrip().decode()
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result.append(m)
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logger.debug("got device status: %s", result)
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return result
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def ping(self):
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async def ping(self):
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try:
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stat = self.get_status()
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stat = await self.get_status()
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except asyncio.CancelledError:
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raise
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except:
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return False
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# check that version number matches is "21"
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@ -5,6 +5,7 @@
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import argparse
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import logging
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import sys
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import asyncio
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from artiq.devices.novatech409b.driver import Novatech409B
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from artiq.protocols.pc_rpc import simple_server_loop
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@ -38,6 +39,7 @@ def main():
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sys.exit(1)
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dev = Novatech409B(args.device if not args.simulation else None)
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asyncio.get_event_loop().run_until_complete(dev.setup())
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try:
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simple_server_loop(
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{"novatech409b": dev}, bind_address_from_args(args), args.port)
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