def setup(self, direction, resistor=GPIO.PULL_UP):
if not direction in [self.OUTPUT, self.INPUT]:
raise IoTPy_APIError(
"Invalid digital pin direction. Should be INPUT or OUTPUT")
if direction == self.INPUT and not resistor in [
GPIO.NONE, GPIO.PULL_UP, GPIO.PULL_DOWN
]:
raise IoTPy_APIError(
"Invalid GPIO resistor setting. Should be GPIO.NONE, GPIO.PULL_UP or GPIO.PULL_DOWN"
)
self.direction = direction
if direction == self.INPUT:
self.resistor = resistor
if resistor == self.PULL_UP:
mode = 4 # PULL_UP
elif resistor == self.PULL_DOWN:
mode = 2 # PULL_DOWN
else:
mode = 0 # HIGH_Z
else:
mode = 1 # OUTPUT
self.board.low_level_io(
0,
encode_sfp(
3, [self._logical_pins,
chr(mode) * len(self._logical_pins)]))
def set_pulse_time(self, pulse_us):
"""
Set PWM high (on state) time.
:param pulse_us: Pulse time in microseconds.
:type pulse_us: int
:raise: IoTPy_APIError
"""
if self.primary:
self.board.low_level_io(0, encode_sfp(
2, [self.logical_pin])) # set pin secondary function
self.primary = False
if 0 <= pulse_us <= PWM_PORT_RUNNING[self.pwm_port]['period']:
self.pulse_time = pulse_us
high_time = pulse_us
if self.polarity == 0:
high_time = PWM_PORT_RUNNING[
self.pwm_port]['period'] - pulse_us
self.board.low_level_io(
0,
encode_sfp(PWM._PWM_PORT_FUNCTIONS[self.pwm_port][1],
[self.pwm_pin, high_time]))
else:
errmsg(
"UPER error: PWM high time is out of range on logical pin %d."
% self.logical_pin)
raise IoTPy_APIError("PWM high time is out of range.")
def __init__(self, *args, **kw):
super(IoPinout, self).__init__(*args, **kw)
for key in self:
if not (isinstance(key, int) or isinstance(
key, string_types)) or not isinstance(self[key], Pin):
raise IoTPy_APIError(
"IoPinout must consist of integer or string keys and Pin values."
)
def spi(self, name, clock=1000000, mode=SPI.MODE_0):
_names = {"SPI0": 0, "SPI1": 1}
if isinstance(name, int):
port = name
elif isinstance(name, str):
if _names.has_key(name):
port = _names[name]
else:
raise IoTPy_APIError(
"Invalid SPI name %s. Must be one of %s." %
(name, ", ".join(sorted(_names.keys()))))
else:
raise IoTPy_APIError("PWM name must be an integer or a string")
divider = int(round(2.0e6 / clock))
return SPI(self, port, divider, mode)
def _encode_bytes(byte_string):
if len(byte_string) < 64:
return chr(0x40 | len(byte_string)).encode('latin-1') + byte_string
packedlen = pack('>I', len(byte_string)).lstrip(b'\x00')
if len(packedlen) == 1:
return b'\xc4' + packedlen + byte_string
elif len(packedlen) == 2:
return b'\xc5' + packedlen + byte_string
else:
raise IoTPy_APIError("UPER API: - too long string passed to UPER, encode_bytes can't handle it.")
def __init__(self, board, pin):
self.board = board
if self.board.pinout[pin].capabilities & CAP_GPIO:
self.logical_pin = self.board.pinout[pin].pinID
else:
raise IoTPy_APIError("Trying to assign OneWire function to non GPIO pin.")
#self.board.low_level_io(0, encode_sfp(1, [self.logical_pin])) # set primary
#self.board.low_level_io(0, encode_sfp(3, [self.logical_pin, 1])) # gpio mode output
self.board.low_level_io(0, encode_sfp(100, [self.logical_pin]))
def low_level_io(self, ret, output_buf):
"""
:param ret:
:param output_buf:
:return:
"""
# print(':'.join(hex(ord(n)) for n in output_buf))
try:
self.io.write(output_buf)
except:
raise IoTPy_APIError(
"Unrecoverable transport writing error, dying.")
data = None
if ret != 0:
try:
data = self.outq.get(True, 1)
except queue.Empty:
raise IoTPy_APIError(
"IoTPy: Nothing to read on port exception.")
# print('|'.join(hex(ord(n)) for n in data))
return data
def __init__(self, board, pin):
self.board = board
if self.board.pinout[pin].capabilities & CAP_ADC:
self.logical_pin = self.board.pinout[pin].pinID
else:
errmsg("IO API: Pin " + str(pin) + " is not an ADC pin.")
raise IoTPy_APIError(
"Trying to assign ADC function to non ADC pin.")
self.adc_pin = self.board.pinout[pin].extra[0]
self.board.low_level_io(0, encode_sfp(
3, [self.logical_pin, 0])) # set GPIO to HIGH_Z
self.board.low_level_io(0, encode_sfp(
2, [self.logical_pin])) # set secondary pin function
self.primary = False
def setup(self, direction, resistor=PULL_UP):
"""
Configure GPIO.
:param direction: GPIO direction: GPIO.OUTPUT or GPIO.INPUT
:param resistor: GPIO internal resistor mode. Used when direction is GPIO.INPUT. Should be GPIO.PULL_UP, \
GPIO.PULL_DOWN or GPIO.NONE.
:raise: IoTPy_APIError
"""
if not direction in [self.OUTPUT, self.INPUT]:
raise IoTPy_APIError(
"Invalid digital pin direction. Should be INPUT or OUTPUT")
if direction == self.INPUT and not resistor in [
self.NONE, self.PULL_UP, self.PULL_DOWN
]:
raise IoTPy_APIError(
"Invalid digital pin resistor setting. Should be GPIO.NONE, GPIO.PULL_UP or GPIO.PULL_DOWN"
)
self.direction = direction
if direction == self.INPUT:
self.resistor = resistor
if resistor == self.PULL_UP:
mode = 4 # PULL_UP
elif resistor == self.PULL_DOWN:
mode = 2 # PULL_DOWN
else:
mode = 0 # HIGH_Z
else:
mode = 1 # OUTPUT
self.board.low_level_io(0, encode_sfp(3, [self.logical_pin, mode]))
def __init__(self, board, pin, freq=100, polarity=1):
self.board = board
if self.board.pinout[pin].capabilities & CAP_PWM:
self.logical_pin = self.board.pinout[pin].pinID
else:
errmsg("UPER API: Pin No:%d is not a PWM pin.", pin)
raise IoTPy_APIError(
"Trying to assign PWM function to non PWM pin.")
self.pwm_port = self.board.pinout[pin].extra[0]
self.pwm_pin = self.board.pinout[pin].extra[1]
self.primary = True
self.pulse_time = 0
self.polarity = polarity
PWM_PORT_RUNNING[self.pwm_port]['channels'] += 1
if PWM_PORT_RUNNING[self.pwm_port]['channels'] == 1:
self.set_frequency(freq)
def decode_sfp(io_buffer):
"""
Decode SFP command from byte buffer.
:param io_buffer: A byte buffer which stores SFP command.
:type io_buffer: bytes string
:return: SFP function ID and arguments list.
"""
if io_buffer[0:1] != b'\xd4':
return
command_length = unpack('>H', io_buffer[1:3])[0] + 3 # get SFP command length located in two bytes
sfp_command = unpack('B', io_buffer[3:4])[0] # get SFP command code
pointer = 4
args = []
while pointer < command_length:
arg_type = ord(io_buffer[pointer:pointer + 1])
pointer += 1
if arg_type < 64: # short int
args.append(arg_type)
elif arg_type < 128: # short str
arg_len = arg_type & 0x3f
args.append(io_buffer[pointer:pointer + arg_len])
pointer += arg_len
else:
arg_len = arg_type & 0x0f
if arg_len < 4: # decoding integers
if arg_len == 0:
args.append(ord(io_buffer[pointer:pointer + 1]))
elif arg_len == 1:
args.append(unpack('>H', io_buffer[pointer:pointer + 2])[0])
elif arg_len == 2:
args.append(unpack('>I', b'\x00' + io_buffer[pointer:pointer + 3])[0])
elif arg_len == 3:
args.append(unpack('>I', io_buffer[pointer:pointer + 4])[0])
pointer += arg_len + 1
else:
if arg_type == 0xc4: # decoding strings
arg_len = ord(io_buffer[pointer:pointer + 1])
elif arg_type == 0xc5:
arg_len = unpack('>H', io_buffer[pointer:pointer + 2])[0]
pointer += 1
else:
raise IoTPy_APIError("UPER API: Bad parameter type in decodeSFP method.")
pointer += 1
args.append(io_buffer[pointer:pointer + arg_len])
pointer += arg_len
return sfp_command, args
def detect_sfp_serial(uid=None):
ports_list = []
my_platform = platform.system()
if uid:
uid = UUID(uid)
if my_platform == "Windows":
for i in range(256):
try:
serial_tmp = serial.Serial('COM' + str(i))
ports_list.append(serial_tmp.portstr)
serial_tmp.close()
except serial.SerialException:
pass
elif my_platform == "Darwin":
ports_list = glob.glob("/dev/tty.usbmodem*")
elif my_platform == "Linux":
ports_list = glob.glob("/dev/ttyACM*")
for my_port in ports_list:
try:
port_to_try = serial.Serial(
port=my_port,
baudrate=230400, # virtual com port on USB is always max speed
parity=serial.PARITY_ODD,
stopbits=serial.STOPBITS_ONE,
bytesize=serial.EIGHTBITS,
timeout=1)
komanda_siuntimui = encode_sfp(255, [])
port_to_try.write(komanda_siuntimui)
response = port_to_try.read(1) # read one, blocking
n = port_to_try.inWaiting() # look if there is more
if n:
response = response + port_to_try.read(n)
sfp = decode_sfp(response)
if sfp[0] == 255: # device info sfp packet
dev_uid = UUID(bytes=sfp[1][1])
if not uid or uid == dev_uid:
return port_to_try
port_to_try.close()
except:
pass
raise IoTPy_APIError("No SFP device was found on serial ports.")
def __init__(self, board, pin):
self.board = board
if self.board.pinout[pin].capabilities & CAP_GPIO:
self.logical_pin = self.board.pinout[pin].pinID
else:
errmsg("UPER API: Pin No:%d is not GPIO pin.", pin)
raise IoTPy_APIError(
"Trying to assign GPIO function to non GPIO pin.")
# Configure default state to be input with pull-up resistor
self.board.low_level_io(0,
encode_sfp(1,
[self.logical_pin])) # set primary
self.direction = self.INPUT
self.resistor = self.PULL_UP
self.setup(
self.direction,
self.resistor) # default GPIO pin state is INPUT and PULL_UP
def __init__(self, board, pins):
self.board = board
for pin in pins:
if not self.board.pinout[pin].capabilities & CAP_GPIO:
raise IoTPy_APIError(
"Trying to assign GPIO function to non GPIO pin.")
self._logical_pins = list(self.board.pinout[pin].pinID for pin in pins)
self._logical_pins = struct.pack("B" * len(self._logical_pins),
*self._logical_pins)
# Configure default state to be input with pull-up resistor
self.direction = GPIO.INPUT
self.resistor = GPIO.PULL_UP
self.setup(self.direction, self.resistor)
self.board.low_level_io(0, encode_sfp(
1, [self._logical_pins])) # set primary
def attach_irq(self,
event,
callback=None,
user_object=None,
debounce_time=50):
"""
Attach (enable) or reconfigure GPIO interrupt event.
:param event: GPIO interrupt event. Can have one of these values: GPIO.RISE, GPIO.FALL, GPIO.CHANGE, \
GPIO.LOW or GPIO.HIGH.
:param callback: User callback function. This function is executed when the interrupt event is received. \
It should take two arguments: interrupt event description and user object. Interrupt event descriptor is \
dictionary with three fields: 'id' - the interrupt ID (interrupt channel), 'event' - interrupt event type \
and 'values' - the logical values on each of interrupt channel (N-th bit represents logical pin value of \
interrupt channel N). User object is the same object as user_object.
:param user_object: User defined object, which will be passed back to the callback function. Optional, \
default is None.
:param debounce_time: Interrupt disable time in milliseconds after the triggering event. This is used to \
"debounce" buttons or to protect communication channel from data flood. Optional, default is 50ms.
:return: Logical interrupt ID
:rtype: int
:raise: IoTPy_APIError
"""
try:
irq_id = self.board.interrupts.index(self.logical_pin)
self.board.low_level_io(0,
encode_sfp(7,
[irq_id])) # detach interrupt
except ValueError:
try:
irq_id = self.board.interrupts.index(None)
self.board.interrupts[irq_id] = self.logical_pin
except ValueError:
errmsg("UPER API: more than 8 interrupts requested")
raise IoTPy_APIError("Too many interrupts.")
self.board.callbackdict[self.logical_pin] = {
'mode': event,
'callback': callback,
'userobject': user_object
}
self.board.low_level_io(
0, encode_sfp(6, [irq_id, self.logical_pin, event, debounce_time]))
return irq_id
def __init__(self, board, port=0, divider=1, mode=MODE_0):
divider = min(max(divider, 1), 256)
self.board = board
self.port = port
self.divider = divider
self.mode = mode
if self.port == 1:
self.board.low_level_io(0, encode_sfp(2, [4]))
self.board.low_level_io(0, encode_sfp(2, [5]))
self.board.low_level_io(0, encode_sfp(2, [11]))
self.board.low_level_io(0, encode_sfp(30, [self.divider, self.mode]))
elif self.port == 0:
self.board.low_level_io(0, encode_sfp(2, [12]))
self.board.low_level_io(0, encode_sfp(2, [13]))
self.board.low_level_io(0, encode_sfp(2, [14]))
self.board.low_level_io(0, encode_sfp(20, [self.divider, self.mode]))
else:
errmsg("UPER API: Wrong SPI port number.", self.port)
raise IoTPy_APIError("SPI port must be 0 or 1, trying to assign something else.")
def set_period(self, period_us):
"""
Set PWM period.
:param period_us: PWM signal period in microseconds.
:type period_us: int
:raise: IoTPy_APIError
"""
if 0 <= period_us <= self._PWM_PORT_MAX[self.pwm_port]:
if PWM_PORT_RUNNING[self.pwm_port]['period'] != period_us:
self.board.low_level_io(
0,
encode_sfp(self._PWM_PORT_FUNCTIONS[self.pwm_port][0],
[period_us]))
PWM_PORT_RUNNING[self.pwm_port]['period'] = period_us
else:
errmsg(
"UPER API: PWM period for port %d can be only between 0-%d" %
(self.pwm_port, self._PWM_PORT_MAX[self.pwm_port]))
raise IoTPy_APIError("PWM period is out of range.")
def __delitem__(self, key):
raise IoTPy_APIError("IoPinout can not be modified.")
def __setitem__(self, key, value):
raise IoTPy_APIError("IoPinout can not be modified.")
def digital_port(self, names):
for name in names:
if not isinstance(name, int):
raise IoTPy_APIError("GPIO name must be an integer.")
return GPIOPort(self, names)
def digital(self, name):
if not (isinstance(name, int) or isinstance(name, string_types)):
raise IoTPy_APIError("GPIO name must be an integer.")
return GPIO(self, name)
