SPRUJH0B April   2025  – September 2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
      1. 1.3.1 External Power Supply or Accessory Requirements
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Hardware Description
      1. 2.1.1 Functional Description and Connections
        1. 2.1.1.1 Power Domains
        2. 2.1.1.2 LEDs
        3. 2.1.1.3 Encoder Connectors
        4. 2.1.1.4 Boot Modes
        5. 2.1.1.5 BoosterPack Sites
        6. 2.1.1.6 Analog Voltage Reference
        7. 2.1.1.7 Other Headers and Jumpers
          1. 2.1.1.7.1 USB Isolation Block
          2. 2.1.1.7.2 Alternate Power
          3. 2.1.1.7.3 5V Step-up Converter
        8. 2.1.1.8 Programmable Gain Amplifier (PGA)
      2. 2.1.2 Debug Interface
        1. 2.1.2.1 XDS110 Debug Probe
        2. 2.1.2.2 Virtual COM Port
      3. 2.1.3 Alternate Routing
        1. 2.1.3.1 Overview
        2. 2.1.3.2 GPIO35/GPIO37 Routing
        3. 2.1.3.3 eQEP Routing
        4. 2.1.3.4 X1, X2 Routing
        5. 2.1.3.5 PWM DAC
    2. 2.2 Using the F28E12x LaunchPad
    3. 2.3 BoosterPacks
    4. 2.4 Hardware Revisions
      1. 2.4.1 Revision A
      2. 2.4.2 Revision E2
  9. 3Software
    1. 3.1 Software Development
      1. 3.1.1 Software Tools and Packages
      2. 3.1.2 F28E12x LaunchPad Demo Program
      3. 3.1.3 Programming and Running Other Software on the F28E12x LaunchPad
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
      1. 4.2.1 LAUNCHXL-F28E12X Board Dimensions
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Frequently Asked Questions
    2. 5.2 Trademarks
  12. 6References
    1. 6.1 Reference Documents
    2. 6.2 Other TI Components Used in This Design
  13. 7Revision History

3.1.2 F28E12x LaunchPad Demo Program

The LAUNCHXL-F28E12X includes an F28E120SC device pre-programmed with a demo program. When the LaunchPad is powered on, the demo program begins with an LED blink sequence on LED4 and LED5. After a few seconds, the device switches into an ADC sampling mode.

Every 1 second, the ADC samples pin ADCINA8 and the sampled value is represented as follows: If the sample is above mid-scale (2048), the red LED4 illuminates. If the sample is below mid-scale, the green LED5 illuminates.

In addition to the LED indicators, ADC sample results are also displayed on your PC through the USB/UART connection. To view the UART information on your PC, first determine the COM port associated with the LaunchPad (see Figure 3-1). To do this in Windows, open the Device Manager. Look for an entry under Ports (COM & LPT) titled "XDS110 Class Application/User UART (COMX)", where X is a number. Remember this number for when you open a serial terminal.

LAUNCHXL-F28E12X LaunchPad XDS110 COM PortFigure 3-1 LaunchPad XDS110 COM Port

The demo application's UART data was tested using PuTTY, which is a free and open-source terminal emulator. To view the UART data in a serial terminal program, open the COM port found using the Windows Device Manager with the following settings:

115200 Baud, 8 data bits, no parity, 1 stop bit.

After properly opening the serial port in your serial terminal, reset the LaunchPad by pressing the S1 reset button and observe the serial terminal to see the TI logo in ASCII art (see Figure 3-2).

LAUNCHXL-F28E12X LaunchPad Demo Serial Terminal - TI LogoFigure 3-2 LaunchPad Demo Serial Terminal - TI Logo

After a few moments, the ADC value sampled on the ADCINA8 pin appears in the bottom-right corner of the terminal and is updated each second (see Figure 3-3). Using a jumper wire, connect the ADCINA8 header to a 3.3V, GND, or other 0-3.3V signal to see the on-screen value change.

LAUNCHXL-F28E12X LaunchPad Demo Serial Terminal - ADC SamplingFigure 3-3 LaunchPad Demo Serial Terminal - ADC Sampling