The first confirmation activates the I2C bus, and the second ensures that this remains available immediately after every system start.įigure 1: The menu item I2C under Advanced Optionsīehind the scenes, raspi-config creates the entry dtparam = i2c_arm = on in the file /boot/config.txt. In the following from the menu screen select the item A7 I2C and answer the two upcoming queries with Yes. Call the settings menu through the command sudo raspi-config and navigate to point 8 Advanced Options. The I2C bus is deactivated by default and can be activated by setting in raspi config Menu. I would appreciate your support in this way! I may make a commission if you buy the components through these links. Oled HDMI touch display for raspberry pi: Wireless Keyboard and Mouse for raspberry pi: Because a circuit that consistently carries a maximum of 3.3 V, minimizing the risk of damaging the Raspberry Pi. Nevertheless, if you have the opportunity to use your components, sensors or ICs with to supply 3.3 V, you should use this option. So there are also 5 V I2C components no 5V on the bus pins. The bus participants switch to the Communication this level only to ground. The SDA and SCL pins of the Raspberry Pi are connected by internal pull-up Resistors pulled to a 3.3v level. It means that the corresponding I2C components do not have their own voltage level on their I2C Pins to lead. The I2C bus usually uses open collector inputs.
I2C0 is through the pins 27 and 28 executed. Channel 0 (I2C0) can also be activated, but is mainly reserved for EEPROMs. In this article we refer primarily to the first channel (I2C1) of the I2C protocol. So several components of the same type different addresses can be assigned in order to have them on the Raspberry To use pi. The modules often also offer the option of using jumpers or Jumpers to change the address.
With the I2C bus, each participant has an address that is addressed individually. One advantage over the SPI bus is that when using it multiple participants on the bus no separate chip select signal the participants dials. The required connections on the Raspberry Pi are pin 3 SDA and the pin 5 SCL. I2C stands for Inter-Integrated Circuit and unlike the SPI bus, only uses two wires. Also for this system there are some external building blocks that are used with the Raspberry Pi can bus. I2C bus represents another interface of the Raspberry Pi.
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