SLOA208B November   2014  – March 2019 TRF7970A , TRF7970A

 

  1.   NFC card emulation using the TRF7970A
    1.     Trademarks
    2.     Terms, Definitions, and Symbols
    3. 1  Introduction
    4. 2  Card Emulation
      1. 2.1 Anticollision
        1. 2.1.1 Card Emulation Type A
        2. 2.1.2 Card Emulation Type B
      2. 2.2 Data Exchange
    5. 3  Configuration and Commands for Type 4 Tag Platforms
      1. 3.1 Overview of Type 4 Tag Configuration
        1. 3.1.1 Tag
        2. 3.1.2 Applications
        3. 3.1.3 Files
      2. 3.2 Firmware Structure
        1.       Example 1. Type 4 Tag Structures Within Example Firmware
        2. 3.2.1 tType4AppDS
        3. 3.2.2 tType4App
        4. 3.2.3 tType4File
        5. 3.2.4 Example Setup
          1.        Example 2. Example Setup of a Type 4 Tag Structure
      3. 3.3 File Structure
        1. 3.3.1 Capability Container
          1.        Example 3. Format of the Capability Container for a Tag With Two Files
        2. 3.3.2 Text RTD
          1.        Example 4. Example of a Text RTD Within an NDEF File
        3. 3.3.3 URI RTD
          1.        Example 5. Example of a URI RTD Within a Proprietary File
        4. 3.3.4 Smart Poster
        5. 3.3.5 V-Card
        6. 3.3.6 MIME
      4. 3.4 Available Type 4 Tag Commands
        1. 3.4.1 Frame Format
        2. 3.4.2 Select
        3. 3.4.3 Read Binary
        4. 3.4.4 Update Binary
      5. 3.5 Modifying Stored Tag Information
    6. 4  Hardware Description
      1. 4.1 LaunchPad™ Development Kit and BoosterPack™ Plug-in Module Setup
        1. 4.1.1 BoosterPack Plug-in Module: DLP-7970ABP
        2. 4.1.2 LaunchPad Development Kit: MSP-EXP430F5529LP
        3. 4.1.3 LaunchPad Development Kit: MSP-EXP432P401R
      2. 4.2 Bundle Available for Purchase
    7. 5  Card Emulation Firmware Example
      1. 5.1 Card Emulation APIs
      2. 5.2 Implementing a Card Emulation Sample Application
        1. 5.2.1 Low-Level Initialization
          1.        Example 6. MCU and TRF7970A Initialization Code Snippet
        2. 5.2.2 Card Emulation NFC Stack Setup
          1.        Example 7. Card Emulation Initialization Code
        3. 5.2.3 Emulation of Different RTDs
    8. 6  Quick Start Guide
    9. 7  Operational Overview
    10. 8  Card Emulation Interoperability Results
    11. 9  Conclusion
    12. 10 References
  2.   Revision History

9 Conclusion

Card emulation is one of the three modes supported by the TRF7970A transceiver. The existing card emulation NFC stack supports the emulation of Type 4A and Type 4B tag platforms at 106 kbps. The TRF7970A only supports 106 kbps for Type 4A/B card emulation. The transceiver is in listening mode when it is emulating a tag. It does not generate its own RF field, but when an NFC-enabled reader/writer is presented, the TRF7970A load modulates the RF field of the NFC device to respond.

The card emulation demo has two modes, a standalone mode and a GUI mode. The standalone mode can emulate both Type 4A and Type 4B tag platforms for six RTD messages: text, URI, smart poster, V-Card, and two MIME types. The GUI mode enables the user to choose which card emulation modes are enabled and customize a text or URL message to emulate (246 bytes maximum).

Based on the tests executed with NFC enabled devices in Table 7, the newer NFC enabled devices have improved throughput.

As downloaded, the firmware example includes the full TI NFC stack, which supports peer-to-peer, card emulation, and reader/writer modes. For applications that do not require all NFC operating modes, there are configuration options available to reduce the NFC stack memory footprint (only compiling required operating modes). These configurations can be made by modifying the #define statements within the nfc_config.h file, located at [Install Path]\nfclink\Source\headers.

For more information about NFC peer-to-peer operation, see NFC active and passive peer-to-peer communication using the TRF7970A.

For more information about NFC reader/writer, see NFC/HF RFID reader/writer using the TRF7970A.