无法将RC522射频识别模块连接到Raspberry Pi 4

Question

我将我的RC522射频识别模块按照https://pimylifeup.com/raspberry-pi-rfid-rc522/连接到我的Raspberry Pi 4，所以我们有Write.py和Read.py：

Write.py：

#!/usr/bin/env python

import RPi.GPIO as GPIO
from mfrc522 import SimpleMFRC522

reader = SimpleMFRC522()

try:
        text = input('New data:')
        print("Now place your tag to write")
        reader.write(text)
        print("Written")
finally:
        GPIO.cleanup()

Read.py是：

#!/usr/bin/env python

import RPi.GPIO as GPIO
from mfrc522 import SimpleMFRC522

reader = SimpleMFRC522()

try:
        id, text = reader.read()
        print(id)
        print(text)
finally:
        GPIO.cleanup()

但是，当我执行sudo python3 Write.py时，会出现以下错误：

Traceback (most recent call last):
  File "Write.py", line 6, in <module>
    reader = SimpleMFRC522()
  File "/usr/local/lib/python3.7/dist-packages/mfrc522/SimpleMFRC522.py", line 14, in __init__
    self.READER = MFRC522()
  File "/usr/local/lib/python3.7/dist-packages/mfrc522/MFRC522.py", line 130, in __init__
    self.spi.open(bus, device)

对于Read.py，我们几乎与Write.py执行错误相同，如下所示：

Traceback (most recent call last):
  File "Read.py", line 6, in <module>
    reader = SimpleMFRC522()
  File "/usr/local/lib/python3.7/dist-packages/mfrc522/SimpleMFRC522.py", line 14, in __init__
    self.READER = MFRC522()
  File "/usr/local/lib/python3.7/dist-packages/mfrc522/MFRC522.py", line 130, in __init__
    self.spi.open(bus, device)
FileNotFoundError: [Errno 2] No such file or directory

FileNotFoundError: [Errno 2] No such file or directory

我尝试过几种方法，但根本没有起作用:1-检查布线2-使用python2 3-检查SPI使用图形用户界面，也启动/config.txt 4-使用sudo apt-get update、sudo apt-get upgrade、sudo apt-get install python3-dev python3-pip和sudo pip3 install spidev

我试图检查lsmod |grep spi，结果是：

spidev                 20480  0
spi_bcm2835            24576  0
spi_bcm2835aux         16384  0

你觉得有什么问题吗？我的覆盆子Pi 4也有一个3.5英寸触摸屏液晶显示器.这就是spi0被保留的原因吗？怎么修呢？我甚至不能使用另一个RC522程序--在github.com中，它们在spi.open(总线、设备)中有几乎相同的错误。

Answer 1

我找到了简单的答案。只要重新安装Raspbian操作系统，重置SPI配置(这是为3.5英寸液晶)，这样RFID读写工作良好，一切都是正确的。