SPRUIU9C August   2020  – October 2025 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 , TMS320F28P550SG , TMS320F28P550SJ , TMS320F28P559SG-Q1 , TMS320F28P559SJ-Q1

 

  1.   1
  2.   Live Firmware Update Without Device Reset on C2000 MCUs
  3.   Trademarks
  4. 1Introduction
  5. 2Key Innovations
  6. 3Building Blocks for LFU
  7. 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
  8. 5Results and Conclusion
  9. 6Example Implementations
  10. 7Revision History

6 Example Implementations

Examples demonstrating the LFU hardware features on F28003x and F28P55x devices are released in the C2000WARE-DIGITALPOWER-SDK and C2000WARE. The software available helps accelerate time to market.

F28003x

TIDM-02011 demonstrates LFU without device reset leveraging the LFU hardware support on F28003x devices. LFU is illustrated for both the C28x CPU and the Control Law Accelerator (CLA), and is implemented in the C2000™ Digital Power Buck Converter BoosterPack reference design. The TIDM-02011 Design Guide details the LFU capabilities with the main control loop running on either the C28x CPU or the CLA.

TIDA-010062 also demonstrates LFU without device reset on F28003x devices. This example displays the LFU capabilities on the LLC stage with the main control loop running on the CLA and background processes running on the C28x CPU. The TIDA-010062 Design Guide details how LFU is implemented in the reference design.

Note: For detailed information on the LFU without device reset implementation on C2000™ devices, please refer to the TIDM-02011 Design Guide.

F28P55x

Two example applications were developed to demonstrate the LFU hardware features on F28P55x devices. LFU has been implemented for the C28x CPU, the Control Law Accelerator (CLA), and Neural Processing Unit (NPU). Note that the CPU and CLA have independent applications due to application use-case; either the CPU or CLA are controlling blinking LEDs.

The following examples can be found in C2000Ware (C2000Ware_x_xx_xx_xx\driverlib\f28p55x\examples\flash):

  1. lfu_cpu_cpu: LFU without device reset for the CPU and NPU
  2. lfu_cla_npu: LFU without device reset for the CLA and NPU

To demonstrate LFU for the NPU, the LFU_BANK0_NPU/LFU_BANK1_NPU build configurations (which adds the RUNNING_ON_NPU pre-defined symbol) are included in both the CPU and CLA applications. The arc fault detect model and the associated test vectors (generated from Model Composer) are executed by the NPU to compare to golden output before the background loop is executed. Note that a reset is necessary to properly initialize the NPU when adding NPU support to the application for the first time.