def main():
global bbd
bbd = None
#
# Create an FTDI BigBangDevice instance, based on serial number passed in
#
bbd = BitBangDevice(device_index=0)
#
# Set direction regiser
#
bbd.direction = 0xFF
#
# Set initial port value to 0
#
bbd.port = 0
#
# That worked, setup XMLRPC server
#
server = SimpleXMLRPCServer.SimpleXMLRPCServer(
('localhost', int(sys.argv[1])), logRequests=False, allow_none=True)
server.register_introspection_functions()
server.register_function(set_bit, 'set_bit')
server.serve_forever()
return 0
def _select_ftdi_channel(channel):
"""Select multiplexer channel. Currently uses a FTDI chip via pylibftdi"""
if channel < 0 or channel > 8:
raise ArgumentError(
"FTDI-selected multiplexer only has channels 0-7 valid, make sure you specify channel with -c channel=number",
channel=channel)
from pylibftdi import BitBangDevice
bb = BitBangDevice(auto_detach=False)
bb.direction = 0b111
bb.port = channel
wait = 10 count = 0 done = False current_rate = None bbd = None # # Create an FTDI BigBangDevice instance, based on serial number passed in # bbd = BitBangDevice(device_index=0) # # Set direction regiser # bbd.direction = 0xFF bbd.port = 0 # # For the way we've wired up the linear actuator motor, this should # produce an "UP" and "DOWN" motor direction. # # Two of the relay channels--the low-order bits just control the +/- # that go to the other two channels. Those channels are wired in # a kind of exclusive OR, so that only bits with opposite settings # produce any motion at all. # DOWN = 0b00001101 UP = 0b00001110 # # Threshold for determining "done" when moving
v = (chksum(command) << 7) + command
i = 0x200
while i > 0:
if v & i:
vll1()
else:
vll0()
i = i >> 1
vllstop()
def cp_pause():
bb.port = 1
sleep(PAUSE)
# auto_detach = False is needed as a workaround to prevent
# segmentation faults when accessing the FTDI device
# see pylibftdi issue #25
bb = BitBangDevice(FTDI_SN, auto_detach=False)
bb.direction = DIRECTION
bb.port = 0
vllinit()
sleep(2)
while True:
send(MS_FWD)
send(MS_REV)
