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lda: separate simulation class

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This commit is contained in:
Yann Sionneau 2014-11-28 17:34:48 +01:00 committed by Sebastien Bourdeauducq
parent b9e7fdb80e
commit 075e540032
1 changed files with 41 additions and 17 deletions
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58
artiq/devices/lda/lda-controller.py
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@ -70,6 +70,35 @@ class HidError(Exception):
pass
class Ldasim:
"""Lab Brick Digital Attenuator simulation controller.
"""
def __init__(self):
self._attenuation = None
def get_attenuation(self):
"""Reads last attenuation value set to the simulated device.
:return: Returns the attenuation value in dB, or None if it was
never set.
:rtype: float
"""
return self._attenuation
def set_attenuation(self, attenuation):
"""Stores the new attenuation value and prints it to console.
:param attenuation: The attenuation value in dB.
:type attenuation: int, float or Fraction
"""
attenuation = round(attenuation*4)/4.
print("[LDA-sim] setting attenuation to {}".format(attenuation))
self._attenuation = attenuation
class Lda:
"""Lab Brick Digital Attenuator controller.
@ -98,13 +127,11 @@ class Lda:
"""
self.product = product
if serial is None and product != "sim":
if serial is None:
serial = next(self.enumerate(product))
self._dev = hidapi.hid_open(self._vendor_id,
self._product_ids[product], serial)
assert self._dev
else:
self._attenuation = None
self._dev = hidapi.hid_open(self._vendor_id,
self._product_ids[product], serial)
assert self._dev
@classmethod
def enumerate(cls, product):
@ -177,10 +204,7 @@ class Lda:
:rtype: float
"""
if self.product != "sim":
return ord(self.get(0x0d, 1))/4.
else:
return self._attenuation
return ord(self.get(0x0d, 1))/4.
def set_attenuation(self, attenuation):
"""Sets attenuation value of the Lab Brick device.
@ -189,12 +213,7 @@ class Lda:
:type attenuation: int, float or Fraction
"""
if self.product != "sim":
self.set(0x8d, bytes(chr(int(round(attenuation*4))), 'ascii'))
else:
attenuation = round(attenuation*4)/4.
print("[LDA-sim] setting attenuation to {}".format(attenuation))
self._attenuation = attenuation
self.set(0x8d, bytes(chr(int(round(attenuation*4))), 'ascii'))
if __name__ == "__main__":
@ -209,5 +228,10 @@ if __name__ == "__main__":
help="USB serial number of the device")
args = parser.parse_args()
simple_server_loop(Lda(args.serial, args.device), "lda",
if args.device == "sim":
lda = Ldasim()
else:
lda = Lda(args.serial, args.device)
simple_server_loop(lda, "lda",
args.bind, args.port)