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

2 Key Innovations

There are two key innovations in the proposed solution:

  • A Compiler LFU initialization routine that initializes variables in the new firmware, executing in tandem with Control ISRs of the old firmware. Preceding this, the download and installation (programming) of the new firmware occurs, also in tandem with the Control ISRs of the old firmware. These steps can be time-consuming, but the tandem execution means that application functionality is not compromised while the necessary steps for LFU execute.
  • Switchover to new firmware at the best time (beginning of the idle time) with interrupts disabled for a very short period of time (< 100 CPU clock cycles), made possible through hardware LFU support in the MCU (swapping of interrupt vectors and function pointers). This step is very short, and decoupling this from the previous step allows activation of new firmware to be very fast.