8. Communication Protocols (e.g., I2C, SPI) for Sensor Integration
Communication protocols are vital for data exchange in embedded systems, facilitating interactions between microcontrollers and sensors. This chapter covers I2C and SPI, two popular protocols, discussing their working principles, advantages, disadvantages, and applications. The choice between these protocols depends on specific use-case requirements such as data transfer speed, complexity, and power consumption.
Sections
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What we have learnt
- I2C and SPI are essential protocols for sensor integration in embedded systems.
- I2C uses a two-wire bus and is ideal for connecting multiple low-speed devices, while SPI is designed for faster data communication.
- The appropriate protocol selection is determined by the application’s requirements, including device count, speed, and power consumption.
Key Concepts
- -- I2C (InterIntegrated Circuit)
- A synchronous, multi-master, multi-slave communication protocol that uses two wires for data transmission, ideal for connecting low-speed peripherals.
- -- SPI (Serial Peripheral Interface)
- A synchronous protocol for high-speed data transfer using four wires, allowing full-duplex communication between a master and one or more slave devices.
- -- MultiMaster Configuration
- A feature in I2C where multiple master devices can control the bus and communicate with slave devices.
- -- Chip Select (CS)
- A dedicated line in SPI to select the slave device for communication, ensuring that only one device is active at a time.
Additional Learning Materials
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