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lda: allow to simulate without needing hidapi 

This also fixes some old style string formating
This commit is contained in:
Yann Sionneau 2014-12-01 12:18:17 +01:00 committed by Sebastien Bourdeauducq
parent c591f1a74d
commit 0c20445413
2 changed files with 67 additions and 62 deletions
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57
artiq/devices/lda/hidapi.py Normal file
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@ -0,0 +1,57 @@
import os
import atexit
import ctypes
import ctypes.util
if "." not in os.environ["PATH"].split(";"):
os.environ["PATH"] += ";."
dir = os.path.split(__file__)[0]
if dir not in os.environ["PATH"].split(";"):
os.environ["PATH"] += ";{}".format(dir)
for n in "hidapi-libusb hidapi-hidraw hidapi".split():
path = ctypes.util.find_library(n)
if path:
break
if not path:
raise ImportError("no hidapi library found")
hidapi = ctypes.CDLL(path)
class HidDeviceInfo(ctypes.Structure):
pass
HidDeviceInfo._fields_ = [
("path", ctypes.c_char_p),
("vendor_id", ctypes.c_ushort),
("product_id", ctypes.c_ushort),
("serial", ctypes.c_wchar_p),
("release", ctypes.c_ushort),
("manufacturer", ctypes.c_wchar_p),
("product", ctypes.c_wchar_p),
("usage_page", ctypes.c_ushort),
("usage", ctypes.c_ushort),
("interface", ctypes.c_int),
("next", ctypes.POINTER(HidDeviceInfo)),
]
hidapi.hid_enumerate.argtypes = [ctypes.c_ushort, ctypes.c_ushort]
hidapi.hid_enumerate.restype = ctypes.POINTER(HidDeviceInfo)
hidapi.hid_free_enumeration.argtypes = [ctypes.POINTER(HidDeviceInfo)]
hidapi.hid_open.argtypes = [ctypes.c_ushort, ctypes.c_ushort,
ctypes.c_wchar_p]
hidapi.hid_open.restype = ctypes.c_void_p
hidapi.hid_read_timeout.argtypes = [ctypes.c_void_p, ctypes.c_char_p,
ctypes.c_size_t, ctypes.c_int]
hidapi.hid_read.argtypes = [ctypes.c_void_p, ctypes.c_char_p, ctypes.c_size_t]
hidapi.hid_write.argtypes = [ctypes.c_void_p, ctypes.c_char_p, ctypes.c_size_t]
hidapi.hid_send_feature_report.argtypes = [ctypes.c_void_p, ctypes.c_char_p,
ctypes.c_size_t]
hidapi.hid_get_feature_report.argtypes = [ctypes.c_void_p, ctypes.c_char_p,
ctypes.c_size_t]
hidapi.hid_error.argtypes = [ctypes.c_void_p]
hidapi.hid_error.restype = ctypes.c_wchar_p
atexit.register(hidapi.hid_exit)

72
artiq/devices/lda/lda_controller.py
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@ -1,11 +1,8 @@
#!/usr/bin/env python3
import argparse
import os
import logging
import atexit
import ctypes
import ctypes.util
import struct
from artiq.management.pc_rpc import simple_server_loop
@ -13,59 +10,6 @@ from artiq.management.pc_rpc import simple_server_loop
logger = logging.getLogger(__name__)
if "." not in os.environ["PATH"].split(";"):
os.environ["PATH"] += ";."
dir = os.path.split(__file__)[0]
if dir not in os.environ["PATH"].split(";"):
os.environ["PATH"] += ";%s" % dir
for n in "hidapi-libusb hidapi-hidraw hidapi".split():
path = ctypes.util.find_library(n)
if path:
break
if not path:
raise ImportError("no hidapi library found")
hidapi = ctypes.CDLL(path)
class HidDeviceInfo(ctypes.Structure):
pass
HidDeviceInfo._fields_ = [
("path", ctypes.c_char_p),
("vendor_id", ctypes.c_ushort),
("product_id", ctypes.c_ushort),
("serial", ctypes.c_wchar_p),
("release", ctypes.c_ushort),
("manufacturer", ctypes.c_wchar_p),
("product", ctypes.c_wchar_p),
("usage_page", ctypes.c_ushort),
("usage", ctypes.c_ushort),
("interface", ctypes.c_int),
("next", ctypes.POINTER(HidDeviceInfo)),
]
hidapi.hid_enumerate.argtypes = [ctypes.c_ushort, ctypes.c_ushort]
hidapi.hid_enumerate.restype = ctypes.POINTER(HidDeviceInfo)
hidapi.hid_free_enumeration.argtypes = [ctypes.POINTER(HidDeviceInfo)]
hidapi.hid_open.argtypes = [ctypes.c_ushort, ctypes.c_ushort,
ctypes.c_wchar_p]
hidapi.hid_open.restype = ctypes.c_void_p
hidapi.hid_read_timeout.argtypes = [ctypes.c_void_p, ctypes.c_char_p,
ctypes.c_size_t, ctypes.c_int]
hidapi.hid_read.argtypes = [ctypes.c_void_p, ctypes.c_char_p, ctypes.c_size_t]
hidapi.hid_write.argtypes = [ctypes.c_void_p, ctypes.c_char_p, ctypes.c_size_t]
hidapi.hid_send_feature_report.argtypes = [ctypes.c_void_p, ctypes.c_char_p,
ctypes.c_size_t]
hidapi.hid_get_feature_report.argtypes = [ctypes.c_void_p, ctypes.c_char_p,
ctypes.c_size_t]
hidapi.hid_error.argtypes = [ctypes.c_void_p]
hidapi.hid_error.restype = ctypes.c_wchar_p
atexit.register(hidapi.hid_exit)
class HidError(Exception):
pass
@ -127,15 +71,18 @@ class Lda:
"""
from artiq.devices.lda.hidapi import hidapi
self.hidapi = hidapi
self.product = product
if serial is None:
serial = next(self.enumerate(product))
self._dev = hidapi.hid_open(self._vendor_id,
self._product_ids[product], serial)
self._dev = self.hidapi.hid_open(self._vendor_id,
self._product_ids[product], serial)
assert self._dev
@classmethod
def enumerate(cls, product):
from artiq.devices.lda.hidapi import hidapi
devs = hidapi.hid_enumerate(cls._vendor_id,
cls._product_ids[product])
try:
@ -148,8 +95,8 @@ class Lda:
def _check_error(self, ret):
if ret < 0:
err = hidapi.hid_error(self._dev)
raise HidError("%s: %s" % (ret, err))
err = self.hidapi.hid_error(self._dev)
raise HidError("{}: {}".format(ret, err))
return ret
def write(self, command, length, data=bytes()):
@ -162,7 +109,8 @@ class Lda:
"""
# 0 is report id/padding
buf = struct.pack("BBB6s", 0, command, length, data)
res = self._check_error(hidapi.hid_write(self._dev, buf, len(buf)))
res = self._check_error(self.hidapi.hid_write(self._dev, buf,
len(buf)))
assert res == len(buf), res
def set(self, command, data):
@ -191,7 +139,7 @@ class Lda:
self.write(command, length)
buf = ctypes.create_string_buffer(8)
while status != command:
res = self._check_error(hidapi.hid_read_timeout(self._dev,
res = self._check_error(self.hidapi.hid_read_timeout(self._dev,
buf, len(buf), timeout))
assert res == len(buf), res
status, length, data = struct.unpack("BB6s", buf.raw)