MikrofonSensor und TemperaturSenor die zwei Python programme funktionieren. mit den jeweiligen 2 json Datein. Beim TemperaturSensor wird im Terminal keine Wertre ausgegeben aber in der json Datei kann man die Temp und Hum sehen.

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Chiara 2025-05-28 14:53:44 +02:00
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# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
#
# SPDX-License-Identifier: MIT
"""
`analogio` - Analog input and output control
=================================================
See `CircuitPython:analogio` in CircuitPython for more details.
* Author(s): Carter Nelson
"""
from adafruit_blinka.microcontroller.mcp2221.pin import Pin
from adafruit_blinka import ContextManaged
class AnalogIn(ContextManaged):
"""Analog Input Class"""
def __init__(self, pin):
self._pin = Pin(pin.id)
self._pin.init(mode=Pin.ADC)
@property
def value(self):
"""Read the ADC and return the value"""
return self._pin.value()
# pylint: disable=no-self-use
@value.setter
def value(self, value):
# emulate what CircuitPython does
raise AttributeError("'AnalogIn' object has no attribute 'value'")
# pylint: enable=no-self-use
def deinit(self):
del self._pin
class AnalogOut(ContextManaged):
"""Analog Output Class"""
def __init__(self, pin):
self._pin = Pin(pin.id)
self._pin.init(mode=Pin.DAC)
@property
def value(self):
"""Return an error. This is output only."""
# emulate what CircuitPython does
raise AttributeError("unreadable attribute")
@value.setter
def value(self, value):
self._pin.value(value)
def deinit(self):
del self._pin

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# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
#
# SPDX-License-Identifier: MIT
"""I2C Class for MCP2221"""
from .mcp2221 import mcp2221
class I2C:
"""Custom I2C Class for MCP2221"""
def __init__(self, *, frequency=100000):
self._mcp2221 = mcp2221
self._mcp2221._i2c_configure(frequency)
def scan(self):
"""Perform an I2C Device Scan"""
return self._mcp2221.i2c_scan()
# pylint: disable=unused-argument
def writeto(self, address, buffer, *, start=0, end=None, stop=True):
"""Write data from the buffer to an address"""
self._mcp2221.i2c_writeto(address, buffer, start=start, end=end)
def readfrom_into(self, address, buffer, *, start=0, end=None, stop=True):
"""Read data from an address and into the buffer"""
self._mcp2221.i2c_readfrom_into(address, buffer, start=start, end=end)
def writeto_then_readfrom(
self,
address,
buffer_out,
buffer_in,
*,
out_start=0,
out_end=None,
in_start=0,
in_end=None,
stop=False,
):
"""Write data from buffer_out to an address and then
read data from an address and into buffer_in
"""
self._mcp2221.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,
)
# pylint: enable=unused-argument

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# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
#
# SPDX-License-Identifier: MIT
"""Chip Definition for MCP2221"""
import os
import time
import atexit
import hid
# Here if you need it
MCP2221_HID_DELAY = float(os.environ.get("BLINKA_MCP2221_HID_DELAY", 0))
# Use to set delay between reset and device reopen. if negative, don't reset at all
MCP2221_RESET_DELAY = float(os.environ.get("BLINKA_MCP2221_RESET_DELAY", 0.5))
# from the C driver
# http://ww1.microchip.com/downloads/en/DeviceDoc/mcp2221_0_1.tar.gz
# others (???) determined during driver developement
RESP_ERR_NOERR = 0x00
RESP_ADDR_NACK = 0x25
RESP_READ_ERR = 0x7F
RESP_READ_COMPL = 0x55
RESP_READ_PARTIAL = 0x54 # ???
RESP_I2C_IDLE = 0x00
RESP_I2C_START_TOUT = 0x12
RESP_I2C_RSTART_TOUT = 0x17
RESP_I2C_WRADDRL_TOUT = 0x23
RESP_I2C_WRADDRL_WSEND = 0x21
RESP_I2C_WRADDRL_NACK = 0x25
RESP_I2C_WRDATA_TOUT = 0x44
RESP_I2C_RDDATA_TOUT = 0x52
RESP_I2C_STOP_TOUT = 0x62
RESP_I2C_MOREDATA = 0x43 # ???
RESP_I2C_PARTIALDATA = 0x41 # ???
RESP_I2C_WRITINGNOSTOP = 0x45 # ???
MCP2221_RETRY_MAX = 50
MCP2221_MAX_I2C_DATA_LEN = 60
MASK_ADDR_NACK = 0x40
class MCP2221:
"""MCP2221 Device Class Definition"""
VID = 0x04D8
PID = 0x00DD
GP_GPIO = 0b000
GP_DEDICATED = 0b001
GP_ALT0 = 0b010
GP_ALT1 = 0b011
GP_ALT2 = 0b100
def __init__(self):
self._hid = hid.device()
self._hid.open(MCP2221.VID, MCP2221.PID)
# make sure the device gets closed before exit
atexit.register(self.close)
if MCP2221_RESET_DELAY >= 0:
self._reset()
self._gp_config = [0x07] * 4 # "don't care" initial value
for pin in range(4):
self.gp_set_mode(pin, self.GP_GPIO) # set to GPIO mode
self.gpio_set_direction(pin, 1) # set to INPUT
def close(self):
"""Close the hid device. Does nothing if the device is not open."""
self._hid.close()
def __del__(self):
# try to close the device before destroying the instance
self.close()
def _hid_xfer(self, report, response=True):
"""Perform HID Transfer"""
# first byte is report ID, which =0 for MCP2221
# remaing bytes = 64 byte report data
# https://github.com/libusb/hidapi/blob/083223e77952e1ef57e6b77796536a3359c1b2a3/hidapi/hidapi.h#L185
self._hid.write(b"\0" + report + b"\0" * (64 - len(report)))
time.sleep(MCP2221_HID_DELAY)
if response:
# return is 64 byte response report
return self._hid.read(64)
return None
# ----------------------------------------------------------------
# MISC
# ----------------------------------------------------------------
def gp_get_mode(self, pin):
"""Get Current Pin Mode"""
return self._hid_xfer(b"\x61")[22 + pin] & 0x07
def gp_set_mode(self, pin, mode):
"""Set Current Pin Mode"""
# already set to that mode?
mode &= 0x07
if mode == (self._gp_config[pin] & 0x07):
return
# update GP mode for pin
self._gp_config[pin] = mode
# empty report, this is safe since 0's = no change
report = bytearray(b"\x60" + b"\x00" * 63)
# set the alter GP flag byte
report[7] = 0xFF
# add GP setttings
report[8] = self._gp_config[0]
report[9] = self._gp_config[1]
report[10] = self._gp_config[2]
report[11] = self._gp_config[3]
# and make it so
self._hid_xfer(report)
def _pretty_report(self, register):
report = self._hid_xfer(register)
print(" 0 1 2 3 4 5 6 7 8 9")
index = 0
for row in range(7):
print("{} : ".format(row), end="")
for _ in range(10):
print("{:02x} ".format(report[index]), end="")
index += 1
if index > 63:
break
print()
def _status_dump(self):
self._pretty_report(b"\x10")
def _sram_dump(self):
self._pretty_report(b"\x61")
def _reset(self):
self._hid_xfer(b"\x70\xAB\xCD\xEF", response=False)
self._hid.close()
time.sleep(MCP2221_RESET_DELAY)
start = time.monotonic()
while time.monotonic() - start < 5:
try:
self._hid.open(MCP2221.VID, MCP2221.PID)
except OSError:
# try again
time.sleep(0.1)
continue
return
raise OSError("open failed")
# ----------------------------------------------------------------
# GPIO
# ----------------------------------------------------------------
def gpio_set_direction(self, pin, mode):
"""Set Current GPIO Pin Direction"""
if mode:
# set bit 3 for INPUT
self._gp_config[pin] |= 1 << 3
else:
# clear bit 3 for OUTPUT
self._gp_config[pin] &= ~(1 << 3)
report = bytearray(b"\x50" + b"\x00" * 63) # empty set GPIO report
offset = 4 * (pin + 1)
report[offset] = 0x01 # set pin direction
report[offset + 1] = mode # to this
self._hid_xfer(report)
def gpio_set_pin(self, pin, value):
"""Set Current GPIO Pin Value"""
if value:
# set bit 4
self._gp_config[pin] |= 1 << 4
else:
# clear bit 4
self._gp_config[pin] &= ~(1 << 4)
report = bytearray(b"\x50" + b"\x00" * 63) # empty set GPIO report
offset = 2 + 4 * pin
report[offset] = 0x01 # set pin value
report[offset + 1] = value # to this
self._hid_xfer(report)
def gpio_get_pin(self, pin):
"""Get Current GPIO Pin Value"""
resp = self._hid_xfer(b"\x51")
offset = 2 + 2 * pin
if resp[offset] == 0xEE:
raise RuntimeError("Pin is not set for GPIO operation.")
return resp[offset]
# ----------------------------------------------------------------
# I2C
# ----------------------------------------------------------------
def _i2c_status(self):
resp = self._hid_xfer(b"\x10")
if resp[1] != 0:
raise RuntimeError("Couldn't get I2C status")
return resp
def _i2c_state(self):
return self._i2c_status()[8]
def _i2c_cancel(self):
resp = self._hid_xfer(b"\x10\x00\x10")
if resp[1] != 0x00:
raise RuntimeError("Couldn't cancel I2C")
if resp[2] == 0x10:
# bus release will need "a few hundred microseconds"
time.sleep(0.001)
# pylint: disable=too-many-arguments,too-many-branches
def _i2c_write(self, cmd, address, buffer, start=0, end=None):
if self._i2c_state() != 0x00:
self._i2c_cancel()
end = end if end else len(buffer)
length = end - start
retries = 0
while (end - start) > 0 or not buffer:
chunk = min(end - start, MCP2221_MAX_I2C_DATA_LEN)
# write out current chunk
resp = self._hid_xfer(
bytes([cmd, length & 0xFF, (length >> 8) & 0xFF, address << 1])
+ buffer[start : (start + chunk)]
)
# check for success
if resp[1] != 0x00:
if resp[2] in (
RESP_I2C_START_TOUT,
RESP_I2C_WRADDRL_TOUT,
RESP_I2C_WRADDRL_NACK,
RESP_I2C_WRDATA_TOUT,
RESP_I2C_STOP_TOUT,
):
raise RuntimeError("Unrecoverable I2C state failure")
retries += 1
if retries >= MCP2221_RETRY_MAX:
raise RuntimeError("I2C write error, max retries reached.")
time.sleep(0.001)
continue # try again
# yay chunk sent!
while self._i2c_state() == RESP_I2C_PARTIALDATA:
time.sleep(0.001)
if not buffer:
break
start += chunk
retries = 0
# check status in another loop
for _ in range(MCP2221_RETRY_MAX):
status = self._i2c_status()
if status[20] & MASK_ADDR_NACK:
raise OSError("I2C slave address was NACK'd")
usb_cmd_status = status[8]
if usb_cmd_status == 0:
break
if usb_cmd_status == RESP_I2C_WRITINGNOSTOP and cmd == 0x94:
break # this is OK too!
if usb_cmd_status in (
RESP_I2C_START_TOUT,
RESP_I2C_WRADDRL_TOUT,
RESP_I2C_WRADDRL_NACK,
RESP_I2C_WRDATA_TOUT,
RESP_I2C_STOP_TOUT,
):
raise RuntimeError("Unrecoverable I2C state failure")
time.sleep(0.001)
else:
raise RuntimeError("I2C write error: max retries reached.")
# whew success!
def _i2c_read(self, cmd, address, buffer, start=0, end=None):
if self._i2c_state() not in (RESP_I2C_WRITINGNOSTOP, 0):
self._i2c_cancel()
end = end if end else len(buffer)
length = end - start
# tell it we want to read
resp = self._hid_xfer(
bytes([cmd, length & 0xFF, (length >> 8) & 0xFF, (address << 1) | 0x01])
)
# check for success
if resp[1] != 0x00:
raise RuntimeError("Unrecoverable I2C read failure")
# and now the read part
while (end - start) > 0:
for _ in range(MCP2221_RETRY_MAX):
# the actual read
resp = self._hid_xfer(b"\x40")
# check for success
if resp[1] == RESP_I2C_PARTIALDATA:
time.sleep(0.001)
continue
if resp[1] != 0x00:
raise RuntimeError("Unrecoverable I2C read failure")
if resp[2] == RESP_ADDR_NACK:
raise RuntimeError("I2C NACK")
if resp[3] == 0x00 and resp[2] == 0x00:
break
if resp[3] == RESP_READ_ERR:
time.sleep(0.001)
continue
if resp[2] in (RESP_READ_COMPL, RESP_READ_PARTIAL):
break
else:
raise RuntimeError("I2C read error: max retries reached.")
# move data into buffer
chunk = min(end - start, 60)
for i, k in enumerate(range(start, start + chunk)):
buffer[k] = resp[4 + i]
start += chunk
# pylint: enable=too-many-arguments
def _i2c_configure(self, baudrate=100000):
"""Configure I2C"""
self._hid_xfer(
bytes(
[
0x10, # set parameters
0x00, # don't care
0x00, # no effect
0x20, # next byte is clock divider
12000000 // baudrate - 3,
]
)
)
def i2c_writeto(self, address, buffer, *, start=0, end=None):
"""Write data from the buffer to an address"""
self._i2c_write(0x90, address, buffer, start, end)
def i2c_readfrom_into(self, address, buffer, *, start=0, end=None):
"""Read data from an address and into the buffer"""
self._i2c_read(0x91, address, buffer, start, end)
def i2c_writeto_then_readfrom(
self,
address,
out_buffer,
in_buffer,
*,
out_start=0,
out_end=None,
in_start=0,
in_end=None,
):
"""Write data from buffer_out to an address and then
read data from an address and into buffer_in
"""
self._i2c_write(0x94, address, out_buffer, out_start, out_end)
self._i2c_read(0x93, address, in_buffer, in_start, in_end)
def i2c_scan(self, *, start=0, end=0x79):
"""Perform an I2C Device Scan"""
found = []
for addr in range(start, end + 1):
# try a write
try:
self.i2c_writeto(addr, b"\x00")
except OSError: # no reply!
# We got a NACK, which could be correct
continue
# store if success
found.append(addr)
return found
# ----------------------------------------------------------------
# ADC
# ----------------------------------------------------------------
def adc_configure(self, vref=0):
"""Configure the Analog-to-Digital Converter"""
report = bytearray(b"\x60" + b"\x00" * 63)
report[5] = 1 << 7 | (vref & 0b111)
self._hid_xfer(report)
def adc_read(self, pin):
"""Read from the Analog-to-Digital Converter"""
resp = self._hid_xfer(b"\x10")
return resp[49 + 2 * pin] << 8 | resp[48 + 2 * pin]
# ----------------------------------------------------------------
# DAC
# ----------------------------------------------------------------
def dac_configure(self, vref=0):
"""Configure the Digital-to-Analog Converter"""
report = bytearray(b"\x60" + b"\x00" * 63)
report[3] = 1 << 7 | (vref & 0b111)
self._hid_xfer(report)
# pylint: disable=unused-argument
def dac_write(self, pin, value):
"""Write to the Digital-to-Analog Converter"""
report = bytearray(b"\x60" + b"\x00" * 63)
report[4] = 1 << 7 | (value & 0b11111)
self._hid_xfer(report)
# pylint: enable=unused-argument
mcp2221 = MCP2221()

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# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
#
# SPDX-License-Identifier: MIT
"""MCP2221 pin names"""
from .mcp2221 import mcp2221
class Pin:
"""A basic Pin class for use with MCP2221."""
# pin modes
OUT = 0
IN = 1
ADC = 2
DAC = 3
# pin values
LOW = 0
HIGH = 1
def __init__(self, pin_id=None):
self.id = pin_id
self._mode = None
def init(self, mode=IN, pull=None):
"""Initialize the Pin"""
if self.id is None:
raise RuntimeError("Can not init a None type pin.")
if pull is not None:
raise NotImplementedError("Internal pullups and pulldowns not supported")
if mode in (Pin.IN, Pin.OUT):
# All pins can do GPIO
mcp2221.gp_set_mode(self.id, mcp2221.GP_GPIO)
mcp2221.gpio_set_direction(self.id, mode)
elif mode == Pin.ADC:
# ADC only available on these pins
if self.id not in (1, 2, 3):
raise ValueError("Pin does not have ADC capabilities")
mcp2221.gp_set_mode(self.id, mcp2221.GP_ALT0)
mcp2221.adc_configure()
elif mode == Pin.DAC:
# DAC only available on these pins
if self.id not in (2, 3):
raise ValueError("Pin does not have DAC capabilities")
mcp2221.gp_set_mode(self.id, mcp2221.GP_ALT1)
mcp2221.dac_configure()
else:
raise ValueError("Incorrect pin mode: {}".format(mode))
self._mode = mode
def value(self, val=None):
"""Set or return the Pin Value"""
# Digital In / Out
if self._mode in (Pin.IN, Pin.OUT):
# digital read
if val is None:
return mcp2221.gpio_get_pin(self.id)
# digital write
if val in (Pin.LOW, Pin.HIGH):
mcp2221.gpio_set_pin(self.id, val)
return None
# nope
raise ValueError("Invalid value for pin.")
# Analog In
if self._mode == Pin.ADC:
if val is None:
# MCP2221 ADC is 10 bit, scale to 16 bit per CP API
return mcp2221.adc_read(self.id) * 64
# read only
raise AttributeError("'AnalogIn' object has no attribute 'value'")
# Analog Out
if self._mode == Pin.DAC:
if val is None:
# write only
raise AttributeError("unreadable attribute")
# scale 16 bit value to MCP2221 5 bit DAC (yes 5 bit)
mcp2221.dac_write(self.id, val // 2048)
return None
raise RuntimeError(
"No action for mode {} with value {}".format(self._mode, val)
)
# create pin instances for each pin
G0 = Pin(0)
G1 = Pin(1)
G2 = Pin(2)
G3 = Pin(3)
SCL = Pin()
SDA = Pin()