def find(vps, sn=None):
"""lookup a usb device based on vid, pid and serial number"""
devices = UsbTools.find_all(vps)
# do we have any devices?
if len(devices) == 0:
return None, "no device found"
if sn is not None:
# filter using the serial number
devices_sn = [d for d in devices if d[2] == sn]
if len(devices_sn) == 0:
# we have devices, but none with this serial number
s = []
s.append("no device with this serial number")
s.append("devices found:")
for d in devices:
s.append("%04x:%04x sn %r" % (d[0], d[1], d[2]))
return None, "\n".join(s)
else:
devices = devices_sn
# no devices
if len(devices) == 0:
return None, "no device found"
# multiple devices
if len(devices) > 1:
s = []
s.append("multiple devices found:")
for d in devices:
s.append("%04x:%04x sn %r" % (d[0], d[1], d[2]))
return None, "\n".join(s)
# 1 device
return devices[0], None
def find(vps, sn = None):
"""lookup a usb device based on vid, pid and serial number"""
devices = UsbTools.find_all(vps)
# do we have any devices?
if len(devices) == 0:
return None, 'no device found'
if sn is not None:
# filter using the serial number
devices_sn = [d for d in devices if d[2] == sn]
if len(devices_sn) == 0:
# we have devices, but none with this serial number
s = []
s.append('no device with this serial number')
s.append('devices found:')
for d in devices:
s.append('%04x:%04x sn %r' % (d[0], d[1], d[2]))
return None, '\n'.join(s)
else:
devices = devices_sn
# no devices
if len(devices) == 0:
return None, 'no device found'
# multiple devices
if len(devices) > 1:
s = []
s.append('multiple devices found:')
for d in devices:
s.append('%04x:%04x sn %r' % (d[0], d[1], d[2]))
return None, '\n'.join(s)
# 1 device
return devices[0], None
def open_ft2232(self, vps, itf, sn):
# find the device on USB
devices = UsbTools.find_all(vps)
if sn is not None:
# filter based on device serial number
devices = [dev for dev in devices if dev[2] == sn]
if len(devices) == 0:
raise IOError("No such device")
self.vid = devices[0][0]
self.pid = devices[0][1]
self.sn = devices[0][2]
self.ftdi = Ftdi()
self.freq = self.ftdi.open_mpsse(self.vid,
self.pid,
itf,
serial=self.sn,
frequency=_FREQ)
self.wrbuf = array.array('B')
self.gpio_init()
self.state_reset()
self.sir_end_state = 'IDLE'
self.sdr_end_state = 'IDLE'
