def get_device_info(self):
"""
Return information about the device.
:return: A list containing board type, major and minor firmware versions, 16 byte unique identifier, \
microcontroller part and bootcode version numbers.
"""
sfp_code, args = decode_sfp(self.low_level_io(1, encode_sfp(255, [])))
if sfp_code != 255:
errmsg("IoTPy error: get_device_info wrong code.")
# raise IoTPy_APIError("")
device_data = args
if device_data[0] >> 24 != 0x55: # 0x55 = 'U'
print("IoTPy error: getDeviceInfo unknown device/firmware type")
# return
device_info = {
'fw_maj': (device_data[0] & 0x00ff0000) >>
16, # Firmware major version number
'fw_min':
device_data[0] & 0x0000ffff, # Firmware minor version number
'uid': UUID(bytes=device_data[1]), # 128bit unique ID
'cpu_id': device_data[2], # UPER LPC CPU part number
'boot': device_data[3], # UPER LPC CPU bootload code version
}
return device_info
def get_device_info(self):
"""
Return information about the device.
:return: A list containing board type, major and minor firmware versions, 16 byte unique identifier, \
microcontroller part and bootcode version numbers.
"""
sfp_code, args = decode_sfp(self.low_level_io(1, encode_sfp(255, [])))
if sfp_code != 255:
errmsg("IoTPy error: get_device_info wrong code.")
# raise IoTPy_APIError("")
device_data = args
if device_data[0] >> 24 != 0x55: # 0x55 = 'U'
print("IoTPy error: getDeviceInfo unknown device/firmware type")
# return
device_info = {
'fw_maj': (device_data[0] & 0x00ff0000) >> 16, # Firmware major version number
'fw_min': device_data[0] & 0x0000ffff, # Firmware minor version number
'uid': UUID(bytes=device_data[1]), # 128bit unique ID
'cpu_id': device_data[2], # UPER LPC CPU part number
'boot': device_data[3], # UPER LPC CPU bootload code version
}
return device_info
def read_pulse(self, level=HIGH, timeout=100000):
if self.direction != self.INPUT:
self.setup(self.INPUT, self.resistor)
return decode_sfp(
self.board.low_level_io(
1, encode_sfp(9, [self.logical_pin, level, timeout])))[1][0]
def transaction(self, address, write_data, read_length):
"""
Perform I2C data transaction.
I2C data transaction consists of (optional) write transaction, followed by (optional) read transaction.
:param address: I2C device address.
:type address: int
:param write_data: A byte sequence to be transmitted. If write_data is empty string, no write transaction \
will be executed.
:type write_data: str
:param read_length: A number of bytes to be received. If read_length is 0, no read transaction will be executed.
:type read_length: int
:return: Received data and I2C transaction status/error code.
:rtype: (str, int)
:raise: IoTPy_APIError, IoTPy_ThingError
"""
try:
result = decode_sfp(self.board.low_level_io(1, encode_sfp(41, [address, write_data, read_length])))
except IoTPy_APIError:
errmsg("UPER API: I2C bus not connected.")
raise IoTPy_IOError("I2C bus not connected.")
return result[1][1], result[1][2] # return read buffer and error
def read_raw(self):
"""
Read ADC value
:return: Raw ADC value.
:rtype: int
"""
return decode_sfp(self.board.low_level_io(1, encode_sfp(10, [self.adc_pin])))[1][1]
def read_raw(self):
"""
Read ADC value
:return: Raw ADC value.
:rtype: int
"""
return decode_sfp(
self.board.low_level_io(1, encode_sfp(10, [self.adc_pin])))[1][1]
def test_decode_sfp(self):
decode_result = sfp.decode_sfp(
b'\xd4\x00i\xff\xc4P09876543210987654321098765432109876543210987654321098765432109876543210987654321J0987654321\x00\x01\xc0@\xc1\x17p\xc2\x01\x11p'
)
sfp_parameters = [
b'09876543210987654321098765432109876543210987654321098765432109876543210987654321',
b'0987654321', 0, 1, 64, 6000, 70000
]
sfp_command = 255
self.assertEqual(decode_result, (sfp_command, sfp_parameters))
def read(self):
"""
Read a digital signal value. If GPIO pis in not configure as input, set it to GPIO.PULL_UP pin mode.
:return: Digital signal value: 0 (LOW) or 1 (HIGH).
:rtype: int
"""
if self.direction != self.INPUT:
self.setup(self.INPUT, self.resistor)
return decode_sfp(
self.board.low_level_io(1, encode_sfp(5,
[self.logical_pin])))[1][1]
def transaction(self, write_data, read_from_slave=True):
"""
Perform SPI data transaction.
:param write_data: Data to be shifted on MOSI line.
:type write_data: str
:param read_from_slave: Flag indicating whether the data received on MISO line should be ignored or not. Optional, default True.
:type read_from_slave: bool
:return: Data received on MISO line, if read_from_slave is True.
:rtype: str
"""
res = self.board.low_level_io(read_from_slave, encode_sfp(21 + self.port * 10, [write_data, int(read_from_slave)]))
if res:
return decode_sfp(res)[1][0]
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 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 read(self):
"""
Read a digital port value. If GPIO port in not configure as input, set it to GPIO.PULL_UP pin mode.
:return: Digital port value.
:rtype: int
"""
if self.direction != GPIO.INPUT:
self.setup(GPIO.INPUT, self.resistor)
values = decode_sfp(
self.board.low_level_io(1, encode_sfp(5,
[self._logical_pins])))[1][1]
value = 0
for i, bit in enumerate(values):
value |= (ord(bit) & 0x1) << i
return value
def test_simple_sfp_decode(self):
self.assertEqual(sfp.decode_sfp(b'\xd4\x00\x01\xff'),(255, []))
def test_simple_sfp_decode(self):
self.assertEqual(sfp.decode_sfp(b'\xd4\x00\x01\xff'), (255, []))
def test_decode_sfp(self):
decode_result = sfp.decode_sfp(b'\xd4\x00i\xff\xc4P09876543210987654321098765432109876543210987654321098765432109876543210987654321J0987654321\x00\x01\xc0@\xc1\x17p\xc2\x01\x11p')
sfp_parameters = [b'09876543210987654321098765432109876543210987654321098765432109876543210987654321', b'0987654321', 0, 1, 64, 6000, 70000]
sfp_command = 255
self.assertEqual(decode_result, (sfp_command, sfp_parameters))
def execute_sfp(self, binary_sfp_command):
decoded_sfp_command = decode_sfp(binary_sfp_command)
results = self.sfp_comands[decoded_sfp_command[0]](
decoded_sfp_command[1])
if results:
return encode_sfp(decoded_sfp_command[0], results)
def execute_sfp(self, binary_sfp_command):
decoded_sfp_command = decode_sfp(binary_sfp_command)
results = self.sfp_comands[decoded_sfp_command[0]](decoded_sfp_command[1])
if results:
return encode_sfp(decoded_sfp_command[0], results)
