![]() Ultra Fast-Mode (UFm), with a bit rate up to 5 Mbit/s.High-speed Mode (Hs-mode), with a bit rate up to 3.4 Mbit/s.Fast-Mode Plus (Fm+), with a bit rate up to 1 Mbit/s.Fast-Mode (Fm), with a bit rate up to 400 kbit/s.Standard-Mode (Sm), with a bit rate up to 100 kbit/s.Ultra Fast-mode devices are not compatible with previous versions since the bus is unidirectional. This means any device may be operated at a lower bus speed. Standard-mode, Fast-mode (Fm), Fast-mode Plus (Fm+), and High-speed mode (Hs-mode) devices are downward-compatible. Over time there have been several additions to the specification so that there are now five operating speed categories. Originally, the I2C-bus was limited to 100 kbit/s operations. It’s widely used for attaching lower-speed peripheral ICs to processors and microcontrollers in short-distance, intra-board communication. The I 2C is a multi-master, multi-slave, synchronous, bidirectional, half-duplex serial communication bus. I 2C TM is a registered trademark for its respective owner and maybe it was the reason they call it “Two Wire Interface (TWI)” in some microcontrollers like Atmel AVR. I 2C (i-square-c) is an acronym for “Inter-Integrated-Circuit” which was originally created by Philips Semiconductors (now NXP) back in 1982. Next, we’ll do a handful of LABs to practice using I2C in different projects for communication and modules interfacing with STM32 microcontrollers. And that’s it for this theoretical tutorial. And the different modes to perform I2C transmit & receive operations like (polling – interrupt – DMA) both as an I2C master and as a slave device as well.įinally, we’ll check the available I2C configuration inside of CubeMX and how to configure & operate the peripheral using the provided HAL APIs. ![]() In conclusion, we’ll take a look at the possible interrupt signals that can be triggered by the I2C hardware. And we’ll get a closer look at the STM32 I2C hardware module and its internal functionalities, modes of operation, options, and configurations. Starting with an introduction to the Inter-Integrated Circuit (I2C) communication. In this tutorial, we’ll be discussing the I2C hardware in STM32 microcontrollers. Previous Tutorial Tutorial 44 Next Tutorial STM32 I2C Communication Tutorial – HAL Examples STM32 Course Home Page □
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