SPRADS1 June   2025 F29H850TU

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Hardware Security Module
    2. 1.2 Flash Programming Fundamentals
    3. 1.3 High-Level Flow
    4. 1.4 Flow Chart
  5. 2Flash-Based UART SBL with FOTA
    1. 2.1 Implementation
    2. 2.2 Triggering a Bank Swap
  6. 3FOTA_Example_Application
    1. 3.1 led_blinky_cpu1.c
    2. 3.2 Combining the Flash-Based SBL with the FOTA_Example_Application
    3. 3.3 Adding a CPU3 Application
  7. 4Host Application: UART Flash Programmer
    1. 4.1 Overview
  8. 5Example Usage
    1. 5.1 Loading the SBL onto the Device
      1. 5.1.1 Loading by CCS (JTAG)
      2. 5.1.2 Loading via UART Boot and the UART Flash Kernel
    2. 5.2 Example UART Loading Process
  9. 6FAQ
    1. 6.1 General
    2. 6.2 Application Load
  10. 7Summary
  11. 8References

Abstract

The goal of this application note is to detail an example project that provides a flash-based implementation to demonstrate a Firmware-Over-The-Air (FOTA) upgrade over UART on F29H85x. The implementation enables FOTA upgrades for both CPU1 and CPU3 while application interrupts are still being serviced. Once the firmware upgrade is complete and a device reset has been issued, a bank swap is triggered and the firmware received over UART executes in the newly activated flash address space.