SPRADE5 February   2025 TDA4VM , TDA4VM-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Optimization Methology
    1. 2.1 Bootloader Switch to SBL From OSPI Boot Media
    2. 2.2 Linux Device Tree Optimizations
    3. 2.3 File System Switch to Tiny rootfs
    4. 2.4 Vision_apps Framework Optimizations
    5. 2.5 Imaging Framework Optimizations
    6. 2.6 Vision_apps SRV Application Redesign
  6. 3Detailed Design Procedure
    1. 3.1 Linux Integration (PSDKLA)
    2. 3.2 Imaging Integration(PSDKRA)
    3. 3.3 Vision_apps Integration (PSDKRA)
    4. 3.4 PDK Implementation (PSDKRA)
      1. 3.4.1 Build R5 SBL for OSPI Boot Mode
      2. 3.4.2 Build combined_appImage
      3. 3.4.3 Copy TIFS and phy Tuning Parameters
    5. 3.5 Flashing the Binaries to OSPI
    6. 3.6 Steps to Install vision_apps With tiny-rootfs on SD Card
    7. 3.7 Copy Test Data to SD card (one time only)
    8. 3.8 Init Script
    9. 3.9 Moving File System From SD to eMMC
  7. 4Logs
  8. 5Summary
  9. 6References

Abstract

Surround view application involves multiple cores running in parallel. MCU R5F starts with booting the device, A72 triggering the vision apps application, R5F starting the camera and display. Using the default Linux SDK with vision_apps, the time taken to achieve surround view is of the order of 25 sec as depicted in Figure 1-1. This application note focuses on optimizing the time to get out the first frame of surround view to display in approximately 2.6 seconds.

Note: This document is based on the SDK 08.06.00.12 and is tested on the J721E EVM.