Compiling and Flashing

Table of Contents

• TOOLCHAIN PREREQUISITE
• BUILD
  • To build firmware for a specific platform
  • To build doxygen documents
  • To build everything
  • Build artifacts
  • To clean the build artifacts
• FLASH

This Document describes the steps to build and flash this project

TOOLCHAIN PREREQUISITE

You must download the external Toolchain. NVIDIA does not distribute this toolchain.

gcc-arm-none-eabi-7-2018-q2-update:

https://developer.arm.com/-/media/Files/downloads/gnu-rm/7-2018q2/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2?revision=bc2c96c0-14b5-4bb4-9f18-bceb4050fee7?product=GNU%20Arm%20Embedded%20Toolchain,64-bit,,Linux,7-2018-q2-update

BUILD

Set the appropriate paths for the below variables:

export SPE_FREERTOS_BSP=<path to root directory where rt-aux-cpu-demo-fsp, fsp and freertos source directories reside>
export CROSS_COMPILE=<path to installed cross compiler>/gcc-arm-none-eabi-7-2018-q2-update/bin/arm-none-eabi-
 
cd ${SPE_FREERTOS_BSP}/rt-aux-cpu-demo-fsp

To build firmware for a specific platform

Build firmware for t19x:

make bin_t19x

Build firmware for t23x:

make bin_t23x

Note

Build speed is significantly faster by using the -j <jobs> option with make. For example, make -j16 bin_t19x.

To build doxygen documents

Make sure you have doxygen installed on your computer. For Ubuntu systems:

sudo apt-get install doxygen

To generate the documents:

make docs

The output can be found at out/docs.

To build everything

make

or

make all

The above commands build all the targets i.e. spe firmware binaries for all the SOCs and Doxygen documents.

Build artifacts

The built SPE firmware binary can be found at out/<soc>/spe.bin. The doxygen build generates out/docs/index.html file. Open it using a browser to navigate the documentation.

To clean the build artifacts

Clean everything (documentation and firmware):

make clean

To clean t19x only firmware objects and build artifacts:

make clean_t19x

To clean t23x only firmware objects and build artifacts:

make clean_t23x

To clean only doxygen generated files:

make clean_docs

FLASH

1. Back up the original copies of spe_t194.bin and spe_t234.bin located in the following directory:

   Linux_for_Tegra/bootloader/

2. Copy the generated out/<soc>/spe.bin to the following locating, depending on your target.
   • For the T194 SoC, copy it to:

     Linux_for_Tegra/bootloader/spe_t194.bin

   • For the T234 SoC, copy it to:

     Linux_for_Tegra/bootloader/spe_t234.bin

     The Linux_for_Tegra directory is part of the extracted L4T build that you used to flash the Jetson device.
3. Use the command below to just flash only the spe-fw partition:

   sudo ./flash.sh -k spe-fw <T194 SoC based Jetson platforms> mmcblk0p1
   sudo ./flash.sh -k A_spe-fw <T234 SoC based Jetson platforms> mmcblk0p1