SPRUIU9B August   2020  – September 2022 TMS320F280033 , TMS320F280034 , TMS320F280034-Q1 , TMS320F280036-Q1 , TMS320F280036C-Q1 , TMS320F280037 , TMS320F280037-Q1 , TMS320F280037C , TMS320F280037C-Q1 , TMS320F280038-Q1 , TMS320F280038C-Q1 , TMS320F280039 , TMS320F280039-Q1 , TMS320F280039C , TMS320F280039C-Q1 , TMS320F280040-Q1 , TMS320F280040C-Q1 , TMS320F280041 , TMS320F280041-Q1 , TMS320F280041C , TMS320F280041C-Q1 , TMS320F280045 , TMS320F280048-Q1 , TMS320F280048C-Q1 , TMS320F280049 , TMS320F280049-Q1 , TMS320F280049C , TMS320F280049C-Q1 , TMS320F28P550SJ , TMS320F28P559SJ-Q1

 

  1.   Live Firmware Update Without Device Reset on C2000 MCUs
  2.   Trademarks
  3. 1Introduction
  4. 2Key Innovations
  5. 3Building Blocks for LFU
  6. 4Details of Proposed Solution
    1. 4.1 Flash Bank Organization
    2. 4.2 LFU Concepts and Factors Impacting Performance
    3. 4.3 Hardware Support for LFU
      1. 4.3.1 Multiple Flash Banks
      2. 4.3.2 Interrupt Vector Table Swap
      3. 4.3.3 RAM Block Swap
      4. 4.3.4 Hardware Register Flags
    4. 4.4 LFU Compiler Support
    5. 4.5 Application LFU Flow
  7. 5Results and Conclusion
  8. 6Revision History

4.1 Flash Bank Organization

The dual-bank Flash is partitioned as shown in Figure 4-1. Two sectors in each bank are allocated to the LFU bootloader, which comprises of Flash bank selection logic, the SCI kernel, and Flash APIs. These do not change during firmware upgrades. Bank 1 does not contain bank selection logic. The rest of the Flash sectors in the bank are allocated to the application. Bank selection logic allows the bootloader to determine which, if any, of the Flash banks are programmed with application firmware, and which bank contains the most recent application firmware version. Thus, bank selection logic is the entry point of the software system. The SCI kernel implements the transfer of the image from the host, and programming of Flash through Flash programming APIs (resident either in Flash or in ROM). A few locations in Sector 2 are reserved to store the below information:

  • START – Indicates that Flash erase is complete and program/verification is about to begin
  • KEY– The firmware in a bank is considered valid if this location contains a specific pattern
  • Firmware Revision number (REV) – used by the bank selection logic to determine the newer firmware version between banks 0 and 1
Figure 4-1 Dual-Bank Flash Partitioning