LinuxWindows
Cadet 3rd Year
- Registriert
- Okt. 2018
- Beiträge
- 39
Ich möchte einen Neopixel RGB-Strip mit dem Raspberrypi steuern. Da bin ich auf die Adafruit-Lösung gestoßen. Ich habe die Anleitungen befolgt, doch wenn ich den Test-Code ausführen möchte gibt es einen Fehler:
Die betreffende Stelle im Code ist:
kompletter code der DAtei.
Ich nerve wirklich....
Code:
pi@raspberrypi:~/Downloads $ python3 blinkatest.py
Hello blinka!
Digital IO ok!
Traceback (most recent call last):
File "blinkatest.py", line 12, in <module>
i2c = busio.I2C(board.SCL, board.SDA)
File "/home/pi/.local/lib/python3.5/site-packages/busio.py", line 15, in __init__
self.init(scl, sda, frequency)
File "/home/pi/.local/lib/python3.5/site-packages/busio.py", line 24, in init
from machine import I2C as _I2C
ImportError: No module named 'machine'
Code:
else:
from machine import I2C as _I2C //Zeile 24!!
from microcontroller.pin import i2cPorts
for portId, portScl, portSda in i2cPorts:
if scl == portScl and sda == portSda:
self._i2c = _I2C(portId, mode=_I2C.MASTER, baudrate=frequency)
break
Code:
"""
`busio` - Bus protocol support like I2C and SPI
=================================================
See `CircuitPython:busio` in CircuitPython for more details.
* Author(s): cefn
"""
from adafruit_blinka import Enum, Lockable, agnostic
from adafruit_blinka.agnostic import board_id
class I2C(Lockable):
def __init__(self, scl, sda, frequency=400000):
self.init(scl, sda, frequency)
def init(self, scl, sda, frequency):
self.deinit()
if board_id == "raspi_3" or board_id == "raspi_2":
from adafruit_blinka.microcontroller.raspi_23.i2c import I2C as _I2C
if board_id == "beaglebone_black":
from adafruit_blinka.microcontroller.raspi_23.i2c import I2C as _I2C
else:
from machine import I2C as _I2C //Zeile 24!!
from microcontroller.pin import i2cPorts
for portId, portScl, portSda in i2cPorts:
if scl == portScl and sda == portSda:
self._i2c = _I2C(portId, mode=_I2C.MASTER, baudrate=frequency)
break
else:
raise NotImplementedError("No Hardware I2C on (scl,sda)={}\nValid UART ports".format(
(scl, sda), i2cPorts))
def deinit(self):
try:
del self._i2c
except AttributeError:
pass
def __enter__(self):
return self
def __exit__(self, exc_type, exc_value, traceback):
self.deinit()
def scan(self):
return self._i2c.scan()
def readfrom_into(self, address, buffer, *, start=0, end=None):
if start is not 0 or end is not None:
if end is None:
end = len(buffer)
buffer = memoryview(buffer)[start:end]
stop = True # remove for efficiency later
return self._i2c.readfrom_into(address, buffer, stop=stop)
def writeto(self, address, buffer, *, start=0, end=None, stop=True):
if isinstance(buffer, str):
buffer = bytes([ord(x) for x in buffer])
if start is not 0 or end is not None:
if end is None:
return self._i2c.writeto(address, memoryview(buffer)[start:], stop=stop)
else:
return self._i2c.writeto(address, memoryview(buffer)[start:end], stop=stop)
return self._i2c.writeto(address, buffer, stop=stop)
def writeto_then_readfrom(self, address, buffer_out, buffer_in, *, out_start=0, out_end=None, in_start=0, in_end=None, stop=False):
return self._i2c.writeto_then_readfrom(address, buffer_out, buffer_in,
out_start=out_start, out_end=out_end,
in_start=in_start, in_end=in_end, stop=stop)
class SPI(Lockable):
def __init__(self, clock, MOSI=None, MISO=None):
print("SPI(): __init()")
self.deinit()
if board_id == "raspi_3" or board_id == "raspi_2":
from adafruit_blinka.microcontroller.raspi_23.spi import SPI as _SPI
elif board_id == "beaglebone_black":
print("SPI(): beaglebone_black: from adafruit_blinka.microcontroller.raspi_23.spi import SPI as _SPI")
from adafruit_blinka.microcontroller.raspi_23.spi import SPI as _SPI
else:
from machine import SPI as _SPI
from microcontroller.pin import spiPorts
print("spiPorts: {0}".format(spiPorts))
print("for:")
for portId, portSck, portMosi, portMiso in spiPorts:
print(portId, portSck, portMosi, portMiso)
if ((clock == portSck) and # Clock is required!
(MOSI == portMosi or MOSI == None) and # But can do with just output
(MISO == portMiso or MISO == None)): # Or just input
print("Line 91")
print(_SPI)
print(_SPI(portId))
self._spi = _SPI(portId)
self._pins = (portSck, portMosi, portMiso)
break
else:
raise NotImplementedError(
"No Hardware SPI on (SCLK, MOSI, MISO)={}\nValid SPI ports:{}".
format((clock, MOSI, MISO), spiPorts))
def configure(self, baudrate=100000, polarity=0, phase=0, bits=8):
if board_id == "raspi_3" or board_id == "raspi_2":
from adafruit_blinka.microcontroller.raspi_23.spi import SPI as _SPI
from adafruit_blinka.microcontroller.raspi_23.pin import Pin
elif board_id == "beaglebone_black":
# reuse the raspberry pi class as both boards use Linux spidev
from adafruit_blinka.microcontroller.raspi_23.spi import SPI as _SPI
from adafruit_blinka.microcontroller.beaglebone_black.pin import Pin
else:
from machine import SPI as _SPI
from machine import Pin
if self._locked:
# TODO check if #init ignores MOSI=None rather than unsetting, to save _pinIds attribute
self._spi.init(
baudrate=baudrate,
polarity=polarity,
phase=phase,
bits=bits,
firstbit=_SPI.MSB,
sck=Pin(self._pins[0].id),
mosi=Pin(self._pins[1].id),
miso=Pin(self._pins[2].id)
)
else:
raise RuntimeError("First call try_lock()")
def deinit(self):
self._spi = None
self._pinIds = None
def write(self, buf, start=0, end=None):
return self._spi.write(buf, start, end)
def readinto(self, buf, start=0, end=None, write_value=0):
return self._spi.readinto(buf, start, end)
def write_readinto(self, buffer_out, buffer_in, out_start=0, out_end=None, in_start=0, in_end=None):
return self._spi.write_readinto(buffer_out, buffer_in, out_start, out_end, in_start, in_end)
class UART(Lockable):
class Parity(Enum):
pass
Parity.ODD = Parity()
Parity.EVEN = Parity()
def __init__(self,
tx,
rx,
baudrate=9600,
bits=8,
parity=None,
stop=1,
timeout=1000,
receiver_buffer_size=64,
flow=None):
from machine import UART as _UART
from microcontroller.pin import uartPorts
self.baudrate = baudrate
if flow is not None: # default 0
raise NotImplementedError(
"Parameter '{}' unsupported on {}".format(
"flow", agnostic.board))
# translate parity flag for Micropython
if parity is UART.Parity.ODD:
parity = 1
elif parity is UART.Parity.EVEN:
parity = 0
elif parity is None:
pass
else:
raise ValueError("Invalid parity")
# check tx and rx have hardware support
for portId, portTx, portRx in uartPorts: #
if portTx == tx and portRx == rx:
self._uart = _UART(
portId,
baudrate,
bits=bits,
parity=parity,
stop=stop,
timeout=timeout,
read_buf_len=receiver_buffer_size
)
break
else:
raise NotImplementedError(
"No Hardware UART on (tx,rx)={}\nValid UART ports".format(
(tx, rx), uartPorts))
def deinit(self):
self._uart = None
def read(self, nbytes=None):
return self._uart.read(nbytes)
def readinto(self, buf, nbytes=None):
return self._uart.readinto(buf, nbytes)
def readline(self):
return self._uart.readline()
def write(self, buf):
return self._uart.write(buf)
