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    Getting Started with Tiva ARM Cortex M4 Microcontrollers: A Lab Manual for Tiva LaunchPad Evaluation Kit
    Getting Started with Tiva ARM Cortex M4 Microcontrollers: A Lab Manual for Tiva LaunchPad Evaluation Kit
    Getting Started with Tiva ARM Cortex M4 Microcontrollers: A Lab Manual for Tiva LaunchPad Evaluation Kit
    Ebook397 pages2 hours

    Getting Started with Tiva ARM Cortex M4 Microcontrollers: A Lab Manual for Tiva LaunchPad Evaluation Kit

    By Dhananjay V. Gadre and Sarthak Gupta

    ()

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    The book presents laboratory experiments concerning ARM microcontrollers, and discusses the architecture of the Tiva Cortex-M4 ARM microcontrollers from Texas Instruments, describing various ways of programming them. Given the meager peripherals and sensors available on the kit, the authors describe the design of Padma – a circuit board with a large set of peripherals and sensors that connects to the Tiva Launchpad and exploits the Tiva microcontroller family’s on-chip features. ARM microcontrollers, which are classified as 32-bit devices, are currently the most popular of all microcontrollers. They cover a wide range of applications that extend from traditional 8-bit devices to 32-bit devices. Of the various ARM subfamilies, Cortex-M4 is a middle-level microcontroller that lends itself well to data acquisition and control as well as digital signal manipulation applications. Given the prominence of ARM microcontrollers, it is important that they should be incorporated in academic curriculums. However, there is a lack of up-to-date teaching material – textbooks and comprehensive laboratory manuals. In this book each of the microcontroller’s resources – digital input and output, timers and counters, serial communication channels, analog-to-digital conversion, interrupt structure and power management features – are addressed in a set of more than 70 experiments to help teach a full semester course on these microcontrollers. Beyond these physical interfacing exercises, it describes an inexpensive BoB (break out board) that allows students to learn how to design and build standalone projects, as well a number of illustrative projects.
    LanguageEnglish
    PublisherSpringer
    Release dateOct 16, 2017
    ISBN9788132237662
    Getting Started with Tiva ARM Cortex M4 Microcontrollers: A Lab Manual for Tiva LaunchPad Evaluation Kit

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      Book preview

      Getting Started with Tiva ARM Cortex M4 Microcontrollers - Dhananjay V. Gadre

      © Springer (India) Pvt. Ltd. 2018

      Dhananjay V. Gadre and Sarthak GuptaGetting Started with Tiva ARM Cortex M4 Microcontrollershttps://doi.org/10.1007/978-81-322-3766-2_1

      1. Introduction

      Dhananjay V. Gadre¹   and Sarthak Gupta²

      (1)

      Division of Electronics and Communications Engineering, Netaji Subhas Institute of Technology, New Delhi, India

      (2)

      TI Centre for Embedded Product Design, Netaji Subhas Institute of Technology, New Delhi, India

      Dhananjay V. Gadre

      Email: [email protected]

      This lab manual allows the user to get acquainted with the Tiva C Series microcontroller family based on ARM Cortex M4 through a hands-on approach by performing experiments on a hardware evaluation kit, namely, the EK-TM4C123GXL LaunchPad from Texas Instruments. Texas Instruments offers many Tiva-based LaunchPad kits, but for the remainder of the text, we will refer to this as the Tiva Launchpad. The Tiva Launchpad offers great value for money but as is the common feature of all the LaunchPad kits, there are not many user interfaces that a beginner could use to learn the various features of the microcontroller. To alleviate this problem, we have designed a motherboard with many popular input and output devices and connected them to a set of connectors that allows the user to plug the Tiva LaunchPad onto the motherboard using these connectors and get access to these peripheral devices. This motherboard is called Padmaboard.¹

      The experiments proposed in the manual are divided on basis of the microcontroller peripherals required to perform those experiments. The difficulty level of experiments increases as reader progresses through the manual. The later experiments will require combination of multiple microcontroller peripherals together to perform them. Apart from experiments mentioned in the manual, many more experiments can be performed by combination of various features of the PadmaBoard. Apart from performing academic experiments, PadmaBoard can also be used in initial prototyping and testing of many projects.

      This manual also emphasizes on the development of standalone projects based on Tiva C Series microcontroller family. This includes the development of hardware as well as software part for any microcontroller of Tiva C series family.

      1 Tiva LaunchPad

      Tiva C Series EK-TM4C123GXL LaunchPad Evaluation Kit from Texas Instruments is referred in this lab manual for the user to get acquainted with ARM cortex M4 Tiva C series microcontroller family. This evaluation kit includes:

      1.

      Tiva LaunchPad Circuit Board (as shown in Fig. 1)

      2.

      USB micro-B plug to USB-A plug cable

      A331507_1_En_1_Fig1_HTML.gif

      Fig. 1

      Tiva LaunchPad

      There are two USB micro-B connectors, one is for ICDI (In-circuit Debug Interface) for debug applications and another one is for the user to connect the Tiva microcontroller to external Host as a USB device. Connect USB cable to the ICDI USB Micro-B connector and make sure that the slide switch is push toward the Debug side. If the USB cable is connected to Device USB port and the slide switch is toward the Device side, it will still power the Tiva LaunchPad but user will not be able to program it directly. After connecting the USB cable with slide switch in correct position, yellow power LED will light up. This LED will remain ON indicating that LaunchPad is receiving power from source through USB port.

      2 PadmaBoard

      PadmaBoard is a peripheral motherboard of Tiva LaunchPad. This board is placed beneath the Tiva LaunchPad and connected to Tiva LaunchPad through its bottom side of expansion headers as shown in Fig. 2. This board allows the user to utilize various peripherals of microcontroller. The user can perform various experiments based on peripherals like Universal Asynchronous Receiver and Transmitter (UART), Serial Peripheral Interface (SPI), Inter-Integrated Circuit (I2C), and Analog-to-Digital Converter (ADC), which are not possible with just Tiva LaunchPad.

      A331507_1_En_1_Fig2_HTML.gif

      Fig. 2

      Tiva LaunchPad with PadmaBoard

      When PadmaBoard is connected to Tiva LaunchPad. Now power Tiva LaunchPad through USB port, then power LED LED1 on PadmaBoard will light up and will remain ON indicating that PadmaBoard is receiving power from Tiva LaunchPad.

      3 Tiva C Series Microcontroller Breakout Board

      To develop standalone projects on Tiva C Series microcontroller family, a breakout board of Tiva TM4C1231H6PZ² microcontroller is used. Figure 3 shows the breakout board. This board can be programmed (or debug) and powered through FRC connector. Also, breakout board can be powered through the expansion headers. Whenever the breakout board is powered up, power LED LED1 will light up and will remain ON indicating that it is receiving power from the source.

      A331507_1_En_1_Fig3_HTML.gif

      Fig. 3

      Tiva TM4C1231H6PZ Microcontroller Breakout Board

      4 Look Ahead!

      Once it is ensured that the kits (PadmaBoard and Tiva LaunchPad) are running properly, it is time to review the coverage of this lab manual.

      Chapter 2 provides overview ARM cortex M4 architecture along with its peripherals. However it does not cover the detail coverage on ARM processors, for that reader is advised to go through the user guide of processor architecture from ARM. This chapter also includes brief description of peripherals of the microcontrollers belonging to Texas Instrument’s Tiva C Series family.

      Chapter 3 discuses about the Tiva C Series TM4C123G LaunchPad Evaluation Board along with its features like power supply, clock, reset, on board ICDI port, LEDs, switches, and expansion headers.

      Chapter 4 discuses about the PadmaBoard (Peripheral Motherboard of Tiva C Series LaunchPad) in particular about various onboard features in terms of hardware circuit diagram and operation. Peripherals included are temperature sensor, audio input, light sensor, magnetic field sensor, UART connector (for Bluetooth, RS232, RS485 communication), ultrasonic sensor connector, IR transmitter and receiver, Serial LCD and 16 keys Keypad, SD card interface, TV and potentiometer, RTC, dual DAC and audio output, and I2C bus connector (for connecting other external I2C-based modules available in market).

      Chapter 5 deals with the development of standalone ARM projects, implemented using Texas Instrument’s Tiva C Series Microcontrollers family. Also includes various ways of programing TIVA C Series microcontrollers.

      Chapter 6 deals with installation of software tools that are necessary to program Tiva LaunchPad or any Tiva C Series microcontrollers. This chapter illustrates the setup of a complete toolchain to program Tiva LaunchPad or any other Texas Instruments Tiva C series microcontrollers by using open-source tools.

      Chapter 7 deals with the basic structure of embedded C programs. It also includes the basic programs for Tiva C Series microcontrollers using register access.

      Chapter 8 deals with the driver library provided by Texas Instruments for their Tiva C Series microcontrollers. This driver library eases the programming of microcontrollers as user does not need to go into much details by using these libraries. Although this library contains a number of functions, but the basic functions that are most commonly used are illustrated in this chapter.

      Chapter 9 deals with the control of digital input and output ports of Tiva C Series microcontrollers. Also, the chapter deals with peripherals which are controlled with digital IO pins such as LEDs, Switches, buzzer, and ultrasonic module.

      Chapter 10 deals with the various interrupts sources offered by the Tiva C series microcontrollers. Also, this microcontroller family has a pretty nicely ordered interrupt structure and has large number of interrupt sources among which any digital pin can act as interrupt source. This chapter includes a description on using digital pin as an interrupt source.

      Chapter 11 deals with the timers. Tiva C Series microcontrollers have 16-bit, 32-bit, and 64-bit timers. This chapter describes the various modes of timers in which they can be operated in. Also deals with the generation of delays, PWM, interrupts, etc., by using timers.

      Chapter 12 describes Universal Asynchronous Receiver and Transmitter (UART) peripheral on Tiva C Series microcontrollers, which is used to communicate with the host computer and other bluetooth devices.

      Chapter 13 deals with the various modes of operation of microcontroller such as run mode, sleep mode, and deep-sleep mode for power saving.

      Chapter 14 deals with the multichannel Analog-to-Digital Converter (ADC) present on Tiva C Series microcontrollers. This chapter also describes the various peripherals which provide the analog output such as potentiometer, audio input either through MIC or 3.5 mm audio jack, Hall effect sensor, LDR (Light- Dependent Resistor), and temperature sensor using LM35 or thermistor.

      Chapter 15 deals with the serial communication peripherals which includes SPI (Serial Peripheral Interface) and I2C (Inter-Integrated Circuit). This chapter also includes applications of such serial communication peripherals like real-time clock (RTC), digital-to-analog converters using I2C peripheral and microSD card, and television display using SPI peripheral.

      Chapter 16 deals with the various ways of user interface (input as well as output) such as 16 $$\times $$ 2 LCD, 16 keys keypad, and PS/2 keyboard. Also, includes the use of shift registers as 16 $$\times $$ 2 LCD and 16 keys keypad is connected serially through the shift registers.

      Chapter 17 focuses on development of standalone projects by using Tiva C Series microcontrollers instead of Tiva LaunchPad. This chapter will help the reader in developing their own standalone circuits or projects independent of the Tiva LaunchPad.

      5 List of Experiments

      The experiments listed below can be implemented using Tiva LaunchPad and PadmaBoard. The list also includes experiments related to standalone implementation of Tiva microcontrollers. The list is divided into two parts (Tables 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11):

      Experiments using Register Access

      Experiments using API (Application Programming Interface)

      Experiment list under API is further divided on basis of the requirement of microcontroller peripherals to perform that experiment. A brief description for each experiment is mentioned below in tabular format.

      Experiments Using Register Access

      Table 1

      Overview of experiments based on register access

      Experiments Using API (Application Programming Interface)

      a. Digital Input/Output

      Table 2

      Overview of experiments based on digital input/output

      b. Interrupt

      Table 3

      Overview of experiments based on interrupt

      c. Timer

      Table 4

      Overview of experiments based on timer

      d. Universal Asynchronous Receiver and Transmitter (UART)

      Table 5

      Overview of experiments based on UART

      e. Power Management and System Control

      Table 6

      Overview of experiments based on power management and system control

      f. Analog to Digital Converter (ADC)

      Table 7

      Overview of experiments based on ADC

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