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      2. 树莓派 i2c 读/写错误

        Raspberry Pi i2c Read/Write Error(树莓派 i2c 读/写错误)
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                • 本文介绍了树莓派 i2c 读/写错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!


                  像许多人一样,我使用 Pi 已经有一段时间了,但从未真正用它做过任何事情.我终于有时间连接一个 MPU6050 IMU 来玩了.它使用 i2c 进行通信,所以我遵循了 Adafruit 的指南关于启用此处显示的 i2c

                  然后下载官方的 Adafruit 库:

                  • C++
                  • Python

                  使用$ sudo raspi-config检查树莓派的I2C是否启用,并确保I2C地址正确,另外使用$ i2cdetect -y 1检查,像这样:

                  尝试:总线 = Adafruit_I2C(地址=0)打印(默认 I2C 总线是可访问的")除了:print("访问默认I2C总线时出错")mcp = 无对于我在范围内(0x00,0x28):尝试:mcp = Adafruit_MCP230XX(address=i, num_gpios=16)休息除了:经过

                  Like many people, I've had a Pi for a while but never really done anything with it. I've finally got round to hooking up an MPU6050 IMU to play around with. It uses i2c for communication so I followed the guide by Adafruit regarding enabling i2c shown here Adafruit i2c.

                  I then hooked up the MPU6050 to the i2c bus, and using i2cdetect -y 1 I was able to see a device at 0x68.

                  However, when trying to read or write from the device I got a permission denied error, so I followed this post to solve that problem /dev/i2c-x permission. It told me to modify /lib/udev/rules.d/60-i2c-tools.rules with

                  KERNEL=="i2c-0"     , GROUP="i2c", MODE="0660"
                  KERNEL=="i2c-[1-9]*", GROUP="i2c", MODE="0666"

                  This worked, but then when actually trying to read or write using C++, I get "Input/output error". Similarly, using smbus in Python I get [Errno 5] Input/output error When connected to an Arduino I can get this device to work perfectly.

                  I've exhausted every forum post I can find. Hopefully I've just done something stupid. Anyone got any ideas?

                  Original model B RPi running Raspbian, if that's of any help.



                  In normal cases you don't really need to change the /lib/udev/rules.d/60-i2c-tools.rules file, so I would recommend resinstalling raspbian.

                  Connect the MPU6050 to the correct pins:

                  Then download an official Adafruit library:

                  • C++
                  • Python

                  Check if the Raspberry Pi's I2C is enabled with $ sudo raspi-config and make sure the I2C address is correct, besides checking it with $ i2cdetect -y 1, like this:

                    bus = Adafruit_I2C(address=0)
                    print("Default I2C bus is accessible")
                    print("Error accessing default I2C bus")
                  mcp = None
                  for i in range(0x00, 0x28):
                          mcp = Adafruit_MCP230XX(address=i, num_gpios=16)

                  这篇关于树莓派 i2c 读/写错误的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!



                  C++ stl unordered_map implementation, reference validity(C++ stl unordered_map 实现,参考有效性)
                  C++: Is it possible to use a reference as the value in a map?(C++:是否可以使用引用作为映射中的值?)
                  Where ampersand quot;amp;quot; can be put when passing argument by reference?(其中符号“amp;通过引用传递参数时可以放置吗?)
                  Why can a non-const reference parameter be bound to a temporary object?(为什么可以将非常量引用参数绑定到临时对象?)
                  What is a dangling reference?(什么是悬空引用?)
                  C++ reference changes when push_back new element to std::vector(当 push_back 新元素到 std::vector 时,C++ 引用发生变化)
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