Microcontroller Lab | Experiment No. 8: 8051 Microcontroller - Serial Communication and Interrupts by Prakhar Chauhan | Learn Smarter
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Experiment No. 8: 8051 Microcontroller - Serial Communication and Interrupts

This chapter explores the implementation of serial communication and interrupt handling mechanisms in the 8051 microcontroller. By leveraging its built-in UART for data transfer and multiple types of interrupts, the chapter provides essential insights into managing asynchronous events and real-time control within embedded systems. Practical applications involving using the microcontroller for both data transmission and external event handling are also discussed.

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Sections

  • 1

    Aim

    The aim of this experiment is to understand and implement serial communication and interrupt handling mechanisms using the 8051 microcontroller.

    Learning Practice

  • 2

    Objectives

    This section outlines the primary objectives of the experiment focusing on serial communication and interrupt handling using the 8051 microcontroller.

    Learning Practice

  • 3

    Theory

    This section covers the fundamentals of serial communication and interrupt handling in the 8051 microcontroller.

    Learning Practice

  • 3.1

    Serial Communication (Uart)

    This section covers the fundamentals of serial communication using UART, its configuration on the 8051 microcontroller, and its operational significance.

    Learning Practice

  • 3.1.1

    Uart (Universal Asynchronous Receiver/transmitter)

    UART is a crucial hardware peripheral used in the 8051 microcontroller for efficient serial communication.

    Learning Practice

  • 3.1.2

    Baud Rate

    Baud rate refers to the speed of data transmission in serial communication, measured in bits per second.

    Learning Practice

  • 3.1.3

    Data Framing

    This section covers the fundamental concepts of data framing in serial communication, focusing on the 8051 microcontroller's UART functionality.

    Learning Practice

  • 3.1.3.1

    Start Bit

    This section introduces serial communication and interrupt handling mechanisms using the 8051 microcontroller.

    Learning Practice

  • 3.1.3.2

    Data Bits

    This section covers serial communication and interrupt handling in the 8051 microcontroller, emphasizing UART configuration, types of interrupts, and their applications.

    Learning Practice

  • 3.1.3.3

    Parity Bit (Optional)

    The Parity Bit is an optional error detection mechanism used in serial communication to ensure data integrity.

    Learning Practice

  • 3.1.3.4

    Stop Bit(S)

    Stop bits signify the end of a data frame in serial communication, ensuring proper data transmission and reception.

    Learning Practice

  • 3.1.4

    8051 Serial Port Registers

    This section covers the architecture and functioning of serial port registers in the 8051 microcontroller, emphasizing UART configuration.

    Learning Practice

  • 3.1.4.1

    Sbuf (Serial Buffer)

    The SBUF (Serial Buffer) is an integral register in the 8051 microcontroller that facilitates serial communication by holding data for transmission and reception.

    Learning Practice

  • 3.1.4.2

    Scon (Serial Control Register)

    The SCON register is crucial for configuring serial communication in the 8051 microcontroller, enabling various modes of operation and controlling transmission and reception.

    Learning Practice

  • 3.1.4.2.1

    Sm0, Sm1

    This section covers the implementation of serial communication and interrupts using the 8051 microcontroller, highlighting key concepts, configuration methods, and practical applications.

    Learning Practice

  • 3.1.4.2.2

    Ren

    This section covers the 8051 microcontroller's capabilities for serial communication and handling interrupts, outlining essential features and procedures.

    Learning Practice

  • 3.1.4.2.3

    Ri

    This section covers serial communication and interrupt handling mechanisms using the 8051 microcontroller, emphasizing UART configuration and the relationship between interrupts and efficient program execution.

    Learning Practice

  • 3.1.4.3

    Pcon (Power Control Register)

    The PCON register in the 8051 microcontroller consists of the SMOD bit that influences baud rate settings for serial communication.

    Learning Practice

  • 3.1.5

    Baud Rate Generation (Mode 1)

    This section explains the generation of baud rates in Mode 1 of the 8051 microcontroller, detailing configuration methods and calculations.

    Learning Practice

  • 3.2

    Interrupts

    This section explains the concept of interrupts in the 8051 microcontroller, detailing various types of interrupts, how they function, and their applications.

    Learning Practice

  • 3.2.1

    Interrupt Sources In 8051

    This section introduces the interrupt sources available in the 8051 microcontroller along with their functionalities and configuration.

    Learning Practice

  • 3.2.2

    Interrupt Enable Registers

    This section covers the interrupt enable registers in the 8051 microcontroller, detailing how they are used to enable and configure interrupts for effective program execution.

    Learning Practice

  • 3.2.2.1

    Ie (Interrupt Enable Register)

    The Interrupt Enable Register (IE) in the 8051 microcontroller is crucial for enabling or disabling individual interrupts and global interrupts for effective handling of both external and internal events.

    Learning Practice

  • 3.2.2.2

    Ip (Interrupt Priority Register)

    The Interrupt Priority Register (IP) sets the priority levels for each interrupt in the 8051 microcontroller, enabling efficient management of multiple interrupt sources.

    Learning Practice

  • 3.2.3

    Interrupt Service Routine (Isr)

    This section introduces the concept of Interrupt Service Routines (ISRs) and their role in managing interrupts in the 8051 microcontroller, focusing on external and timer interrupts.

    Learning Practice

  • 3.2.4

    Interrupt Vectors

    This section discusses the concept and functionality of interrupt vectors in the 8051 microcontroller.

    Learning Practice

  • 3.2.5

    External Interrupts (Overlineint0, Overlineint1)

    This section covers the concept of external interrupts in the 8051 microcontroller, focusing on overlineINT0 and overlineINT1, including their configurations, functionalities and relevance.

    Learning Practice

  • 3.2.6

    Timer Interrupts (Tf0, Tf1)

    Timer interrupts in the 8051 microcontroller allow it to respond to timer overflow events, enabling periodic tasks.

    Learning Practice

  • 4

    Materials Required

    This section outlines the necessary materials for conducting experiments with the 8051 microcontroller, focusing on serial communication and interrupt handling.

    Learning Practice

  • 5

    Procedure

    This section outlines the experimental procedure for implementing serial communication and interrupts using the 8051 microcontroller.

    Learning Practice

  • 5.1

    Part A: Serial Communication (Transmit And Receive)

    This section introduces serial communication using the 8051 microcontroller, detailing UART configuration and interrupt handling.

    Learning Practice

  • 5.1.1

    Hardware Setup

    This section outlines the hardware setup required for serial communication and interrupt handling using the 8051 microcontroller.

    Learning Practice

  • 5.1.2

    Software Setup (Pc)

    This section outlines the procedures for setting up the software needed to facilitate serial communication between the 8051 microcontroller and a PC.

    Learning Practice

  • 5.1.3

    C Program For Serial Communication (Transmit & Receive Loopback)

    This section focuses on implementing serial communication using the 8051 microcontroller, detailing the setup for transmitting and receiving data, specifically using a loopback example.

    Learning Practice

  • 5.1.4

    Compilation And Flashing

    This section covers the implementation of serial communication using the 8051 microcontroller and the concepts of interrupts, including both external and timer interrupts.

    Learning Practice

  • 5.1.5

    Execution And Observation

    This section explores serial communication and interrupt handling using the 8051 microcontroller, detailing concepts, procedures, and outcomes of practical experiments.

    Learning Practice

  • 5.2

    Part B: External Interrupt Handling

    This section discusses external interrupt handling in the 8051 microcontroller, explaining how to configure and manage interrupts to respond to external events.

    Learning Practice

  • 5.2.1

    Hardware Setup

    This section outlines the hardware and software configuration required to implement serial communication and interrupt handling using the 8051 microcontroller.

    Learning Practice

  • 5.2.2

    C Program For External Interrupt

    This section discusses the implementation of external interrupts in C for the 8051 microcontroller, detailing how to toggle an LED based on button presses.

    Learning Practice

  • 5.2.3

    Compilation And Flashing

    This section focuses on understanding UART serial communication and interrupt handling mechanisms using the 8051 microcontroller.

    Learning Practice

  • 5.2.4

    Execution And Observation

    This section outlines the execution and observation phases of the 8051 microcontroller experiment, focusing on serial communication and interrupt handling.

    Learning Practice

  • 5.3

    Part C: Timer Interrupt For Periodic Task

    This section covers the configuration and usage of timer interrupts in the 8051 microcontroller to perform periodic tasks, specifically updating an LCD display at regular intervals.

    Learning Practice

  • 5.3.1

    Hardware Setup

    This section covers the necessary hardware setup for conducting experiments involving the 8051 microcontroller, including serial communication and interrupt handling.

    Learning Practice

  • 5.3.2

    C Program For Timer Interrupt And Lcd Update

    This section explores how to implement timer interrupts in the 8051 microcontroller to update an LCD display periodically.

    Learning Practice

  • 5.3.3

    Compilation And Flashing

    This section outlines the steps for compiling and flashing a C program for serial communication and interrupts on the 8051 microcontroller.

    Learning Practice

  • 5.3.4

    Execution And Observation

    This section details the execution and observation of experiments related to serial communication and interrupt handling using the 8051 microcontroller.

    Learning Practice

  • 6

    Observations

    The section details the observations made during the experiments involving serial communication and interrupt handling in the 8051 microcontroller.

    Learning Practice

  • 7

    Deliverables

    This section outlines the essential deliverables for the 8051 microcontroller experiment focusing on serial communication and interrupt handling.

    Learning Practice

  • 8

    Conclusion

    This section summarizes the key findings and practical applications of the experiment involving serial communication and interrupts in the 8051 microcontroller.

    Learning Practice

References

Untitled document (16).pdf

Class Notes

Memorization

What we have learnt

  • The basics of serial commun...
  • The significance of interru...
  • The ability to write C prog...

Final Test

Revision Tests