Serial Communication Protocols in Embedded Systems

The presentation titled "Serial Communication Protocols" by Dr. Pardhu Thottempudi delves into the various aspects of serial communication in embedded systems. It covers key communication hardware and protocols, with a focus on the fundamental and widely used serial communication standards.
Key Points:
Introduction to Serial Communications:
Explanation of the basics of serial communication and its importance in embedded systems.
Comparison between serial and parallel communication.
Asynchronous Serial Communication (RS-232):
Description of RS-232 standard, which is a widely used method for serial communication.
Detailed discussion on RS-232 voltage levels, signaling methods, and its applications.
RS-232 Handshaking:
Explanation of handshaking in RS-232, which is a method used to control the flow of data between two devices.
Different handshaking techniques such as hardware handshaking (RTS/CTS) and software handshaking (XON/XOFF).
Serial Peripheral Interface (SPI):
Overview of SPI protocol, a synchronous serial communication interface used for short-distance communication.
Discussion on how SPI works, including the roles of the master and slave devices, clock polarity and phase, and data transmission.
Inter-Integrated Circuit (I2C):
Introduction to I2C, another synchronous serial communication protocol.
Explanation of I2C operation, addressing, and the process of writing a single byte.
Controller Area Network (CAN):
Detailed overview of CAN bus, a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other without a host computer.
Applications of CAN in automotive and industrial systems.
Benefits of CAN:
Discussion on the advantages of CAN, including lower cost from reduced wiring, high robustness, fault tolerance, and reliability.
CAN Specifications:
Technical specifications of CAN, including data rate, bus length, node capacity, and data fields (Arbitration ID).
Practical limits and typical usage scenarios in automotive applications.
CAN Frame Structure:
Explanation of the structure of a CAN frame, which includes an arbitration ID, data field, remote frame, error frame, and overload frame.
CAN Arbitration:
Description of the arbitration process in CAN, which determines the priority of messages on the bus.
How the node with the highest priority (lowest arbitration ID) gets bus access in case of simultaneous transmission attempts.
Data Field in CAN:
Detailed discussion on the data field formats in CAN (standard frame format and extended frame format) as defined in Bosch Version 2.0 specifications.
The presentation effectively covers the essential serial communication protocols used in embedded systems, highlighting their applications, benefits, and technical specifications.