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  • EEPROM Emulation Driver Guide for F29H85x

    • SPRADL4 January   2025 F29H850TU , F29H859TU-Q1

       

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  • EEPROM Emulation Driver Guide for F29H85x
  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Differences Between EEPROM and On-Chip Flash
  6. 3 Overview
    1. 3.1 Basic Concepts
    2. 3.2 Single-Unit Method
    3. 3.3 Ping-Pong Method
    4. 3.4 Creating EEPROM Sections (Pages) and Page Identification
  7. 4 Software Description
    1. 4.1 Software Functionality and Flow
  8. 5 Single-Unit Emulation
    1. 5.1 User Configuration
      1. 5.1.1 EEPROM_Config.h
      2. 5.1.2 F29H85x_EEPROM.c
    2. 5.2 EEPROM Functions
      1. 5.2.1 Initialization and Setup Functions
        1. 5.2.1.1 Configure_Device
        2. 5.2.1.2 EEPROM_Config_Check
      2. 5.2.2 Page Mode Functions
        1. 5.2.2.1 EEPROM_GetValidBank
        2. 5.2.2.2 EEPROM_UpdateBankStatus
        3. 5.2.2.3 EEPROM_UpdatePageStatus
        4. 5.2.2.4 EEPROM_UpdatePageData
        5. 5.2.2.5 EEPROM_Write_Page
      3. 5.2.3 64-Bit Mode Functions
        1. 5.2.3.1 EEPROM_64_Bit_Mode_Check_EOS
        2. 5.2.3.2 EEPROM_Write_64_Bits
      4. 5.2.4 Functions Used in Both Modes
        1. 5.2.4.1 EEPROM_Erase
        2. 5.2.4.2 EEPROM_Read
      5. 5.2.5 Utility Functions
        1. 5.2.5.1 EEPROM_Write_Buffer
        2. 5.2.5.2 Erase_Bank
        3. 5.2.5.3 Set_Protection_Masks
        4. 5.2.5.4 Configure_Protection_Masks
        5. 5.2.5.5 Fill_Buffer
        6. 5.2.5.6 ClearFSMStatus
    3. 5.3 Testing Example
  9. 6 Ping-Pong Emulation
    1. 6.1 User-Configuration
      1. 6.1.1 EEPROM_PingPong_Config.h
      2. 6.1.2 F29H85x_EEPROM_PingPong.c
    2. 6.2 EEPROM Functions
      1. 6.2.1 Initialization and Setup Functions
        1. 6.2.1.1 Configure_Device
        2. 6.2.1.2 EEPROM_Config_Check
      2. 6.2.2 Page Mode Functions
        1. 6.2.2.1 EEPROM_GetValidBank
        2. 6.2.2.2 EEPROM_UpdateBankStatus
        3. 6.2.2.3 EEPROM_UpdatePageStatus
        4. 6.2.2.4 EEPROM_UpdatePageData
        5. 6.2.2.5 EEPROM_Write_Page
      3. 6.2.3 64-Bit Mode Functions
        1. 6.2.3.1 EEPROM_64_Bit_Mode_Check_EOS
        2. 6.2.3.2 EEPROM_Write_64_Bits
      4. 6.2.4 Functions Used in Both Modes
        1. 6.2.4.1 EEPROM_Erase_Inactive_Unit
        2. 6.2.4.2 EEPROM_Read
        3. 6.2.4.3 EEPROM_Erase_All
      5. 6.2.5 Utility Functions
        1. 6.2.5.1 EEPROM_Write_Buffer
        2. 6.2.5.2 Erase_Bank
        3. 6.2.5.3 Configure_Protection_Masks
        4. 6.2.5.4 Set_Protection_Masks
        5. 6.2.5.5 Fill_Buffer
        6. 6.2.5.6 ClearFSMStatus
    3. 6.3 Testing Example
  10. 7 Application Integration
  11. 8 Flash API
    1. 8.1 Flash API Checklist
      1. 8.1.1 Flash API Do's and Do Not's
  12. 9 Source File Listing
  13. 10Troubleshooting
    1. 10.1 General
  14. 11Conclusion
  15. 12References
  16. IMPORTANT NOTICE
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Application Note

EEPROM Emulation Driver Guide for F29H85x

Abstract

Many applications require storing small quantities of system related data (calibration values, device configuration) in non-volatile memory so that it can be used or modified and reused even after power cycling the system. Electrically erasable programmable read-only memory, or EEPROM, is primarily used for this purpose. EEPROMs have the ability to erase and write individual bytes of memory many times over and the programmed locations retain the data over a long period even when the system is powered down. This application note and the associated code help to define a sector(s) of on-chip Flash memory as the emulated EEPROM and is transparently used by the application program for writing, reading, and modifying the data.

Project collateral and source code discussed in this application note can be found in F29H85x SDK 1.00.00.00 (or higher) at the following path: C:\ti\f29h85x-sdk_1_00_00_00\examples\driverlib\single_core\flash.

Trademarks

Code Composer Studio™ is a trademark of Texas Instruments.

All trademarks are the property of their respective owners.

1 Introduction

F29H85x MCUs come with different configurations of Flash memory that is arranged in multiple sectors. Unfortunately, the technology used for the on-chip Flash memory does not allow for the addition of a traditional EEPROM to the chip. This functionality can be emulated, however, on C2000 MCUs, which have in-circuit programming ability for the flash memory. This application report demonstrates this functionality using sectors of the on-chip flash memory. Note that at least one whole flash sector is used for emulation, and as such is not available for storing application code.

 
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