pyelectronics 0.1.4

支持的网关

网关是linux和硬件之间的桥梁。当前支持：

• 总线海盗v3
• Raspberry PI/其他Linux i2c_dev支持的接口

支持的芯片/设备

Read the contributing guide添加设备

• 博世BMP180数字压力传感器
霍尼韦尔3轴数字罗盘IC HMC583L 六轴（陀螺+加速度计）MEMS器件
• NXP LM75A数字温度传感器
• 微芯片MCP23017 16位I/O扩展器
• 7段显示不复用

安装

从pypi安装：

$ pip3 install pyelectronics

各种网关都有自己的依赖关系。安装所需网关的依赖项：

# Requirements for the Raspberry Pi
$ pip3 install pysmbus

# Requirements for the Bus Pirate
$ pip3 install pyserial

要运行doctests，您需要所有依赖项。您可以使用doctest需求文件安装它们：

$ pip3 install -r docs/doctest-requirements.txt

用法

阅读pythonhosted上的完整文档。

首先创建网关实例：

from electronics.gateways import BusPirate
from electronics.gateways import LinuxDevice

# Use a BusPirate to connect to a bus
gw = BusPirate('/dev/ttyUSB0')

# Use a i2c bus with a linux driver (like the raspberry pi)
gw = LinuxDevice(1) # /dev/i2c-1

为连接到网关的组件创建实例：

from electronics.devices import BMP180
from electronics.devices import MPU6050I2C

barometer = BMP180(gw, address=0x77) # Address is optional
inertia = MPU6050(gw)

# Do chip specific initialisation
barometer.load_calibration()
inertia.wakeup()

从传感器读取值：

temperature = barometer.temperature()
pressure = barometer.pressure()
acceleration = inertia.acceleration()
rotation = inertia.angular_rate()

GPIO示例：

# Red led conected to the aux pin of the bus pirate
red_led = gw.get_aux_pin()
# Turn the led on
red_led.write(True)

# An Microchip port expander connected through I2C
expander = MCP23017I2C(gw, address=0x21)

# Get the pins for the two other leds that are connected
# to the port expander
green_led = expander.get_pin('A0')
blue_led = expander.get_pin('A1')

# Bundle the leds to a bus so you can address 8 colours as an int
# the pins on the port expander are open drain, they are inverted with the invert operator (~)
bus = GPIOBus([red_led, ~green_led, ~blue_led])
bus.write(0) # Black
bus.write(7) # White

# Disco!
while True:
    for i in range(0,8):
        bus.write(i)
        sleep(0.2)