![]() It can both transmit and Receive BuffersĤ. ![]() I2C Pins have 3 speed modes: Standard ( 0 to 100 Kb/s), Fast( <= 400 Kb/s) & Fast Plus mode ( <= 1000 Kb/s)ģ. Device can work in Master or Slave Mode with a default salve address = 0x055Ģ. The Raspberry Pi Pico has RP2040 Chip which supports the following features:ġ. But before using an I2C controller, you should configure in software which GPIO pins you want to use with a specific I2C controller. I2C ControllerĮach connection of the controller can be configured through multiple GPIO pins as shown in the figure. The following table shows the connection of GPIO pins with both I2C controllers. You can access both I2C controllers through GPIO pins of Raspberry Pi Pico. The microcontroller RP2040 chip has two I2C controllers. All the other slave devices don’t respond unless their address is specified by the master device on the SDA line. So Effective communication takes place between the master device and a particular slave device. When a master device wants to transfer data to or from a slave device, it specifies this particular slave device address on the SDA line and then proceeds with the transfer. For differentiating between multiple slave devices connected to the same I2C bus, each slave device is physically assigned a permanent 7-bit address. It controls the SCL clock line and decides what operation is to be done on the SDA data line.Īll the devices that respond to instructions from this master device are slaves. At any instant of time, only a single master stays active on the I2C bus. The devices connected to the I2C bus are either masters or slaves. All the devices/ICs on the I2C network are connected to the same SCL and SDA lines as shown above. The data to be transferred is sent through the SDA wire and is synchronized with the clock signal from SCL. The two wires are named Serial Clock Line (SCL) and Serial Data Line (SDA). Like UART communication, I2C only uses two wires to transmit data between devices. It is widely used for attaching lower-speed peripheral ICs to processors and microcontrollers in short-distance, intra-board communication. I2C (Inter-Integrated Circuit) is a synchronous, multi-master, multi-slave, packet-switched, single-ended, serial communication bus. Before that, you can check our Raspberry Pi Pico Getting Started Tutorial to learn more about the module. We will take I2C Scanner Code as an example and check how the I2C Address of a few I2C enabled sensors & modules. We will also learn in detail about the I2C Pin of Raspberry Pi Pico. We will see what is I2C Communication protocol and how does it work. Out of the 26 usable GPIO pins, there are 2 pairs of I2C Pins which will be discussed in this post. The 10 GPIO Pins are not exposed, hence they can’t be used. The board exposes 26 multi-function GPIO pins from a total of 36 GPIO pins. The Raspberry Pi Pico is built using an RP2040 microcontroller. In this tutorial, we will learn how to use I2C Pins in Raspberry Pi Pico & go through the I2C Scanner Code. How to use I2C Pins of Raspberry Pi Pico with I2C Sensors or Modules?.
0 Comments
Leave a Reply. |