Adafruit 31856与覆盆子通信

Question

我一直试图读取一个热电偶的温度在我的覆盆子，但无法使拉皮与adafruit 31856通信。我已经下载了必要的库，并检查了所有连接是否安全和正确，但是，当我试图执行这段代码时，请继续运行这个错误。

任何帮助都是非常感谢的！

码

   import board 
   import digitalio 
   import adafruit_max31856 
   spi = board.SPI() 
   cs = digitalio.DigitalInOut(board.D5) 
   cs.direction = digitalio.Direction.OTUPUT 
   thermocouple = adafruit_max31856.MAX31856(spi,cs) 
   print(thermocouple.temperature) 

错误：

Traceback (most recent call last): 

  File "/home/pi/test4.py", line 6, in <module> 

    spi = board.SPI() 

  File "/usr/local/lib/python3.7/dist-packages/board.py", line 299, in SPI 

    return busio.SPI(SCLK, MOSI, MISO) 

  File "/usr/local/lib/python3.7/dist-packages/busio.py", line 289, in __init__ 

    self._spi = _SPI(portId) 

  File "/usr/local/lib/python3.7/dist-packages/adafruit_blinka/microcontroller/generic_linux/spi.py", line 25, in __init__ 

    self._spi = spi.SPI(device=(portid, 0)) 

  File "/usr/local/lib/python3.7/dist-packages/Adafruit_PureIO/spi.py", line 167, in __init__ 

    raise IOError("{} does not exist".format(device)) 

OSError: /dev/spidev0.0 does not exist

代码 错误

Answer 1

最可能的情况是，有一个用于spi0-0的设备驱动程序，它删除了/dev/spidev0.0设备。检查您的/boot/config.txt是否覆盖加载MAX 31856驱动程序模块。如果您想使用adafruit_max31856库，就不应该加载这个驱动程序。希望这有帮助