Design Overview

This design module demonstrates the FreeRTOS and application running on RPU-0, where:
  • FreeRTOS boots on RPU-0
  • FreeRTOS application "heartbeat" prints periodic messages on UART-1


Design Components

  • petalinux_bsp
    • zynqmp_fsbl
    • pmufw
  • heartbeat.elf

Build Flow Tutorials

This tutorial uses both XSDK and PetaLinux tools. It is recommended to use separate shells for each of the tools.

Heartbeat Application

The heartbeat application is a FreeRTOS application that executes on RPU-0 after the FSBL has finished. This application is a simple dual task application that demonstrates communication between the two tasks by printing messages to the UART1 console.

  • Create a new SDx workspace.
    % cd $TRD_HOME/workspaces/ws_heartbeat
    % xsdk -workspace . &
  • Click 'Import Project' from the welcome screen, browse to the current working directory and make sure the heartbeat, heartbeat_bsp, and hw_platform_0 projects are selected. Click Finish.
  • Right-click on the heartbeat project and select 'Build Project'.
  • Copy the generated heartbeat executable into the PetaLinux BSP.
    cp heartbeat/Debug/heartbeat.elf $TRD_HOME/petalinux/bsp/images/linux

PetaLinux BSP

This tutorial shows how to build a boot image that includes the heartbeat application using the PetaLinux build tool. This step assumes you have run through the PetaLinux build in DM1 previously.

  • Create a boot image.
    % cd $TRD_HOME/petalinux/bsp/images/linux
    % petalinux-package --boot --bif=../../project-spec/boot/dm2.bif --force
  • Copy the generated boot image to the dm2 SD card directory.
    % mkdir -p $TRD_HOME/sd_card/dm2
    % cp BOOT.BIN $TRD_HOME/sd_card/dm2

Run Flow Tutorial

  • See here for board setup instructions.
  • Copy all the files from the $TRD_HOME/sd_card/dm2 SD card directory to a FAT formatted SD card.
  • Power on the board to boot the images; make sure all power rail LEDs are lit green.
  • The user can now see FSBL prints on UART-0 and prints from heartbeat application can be viewed on UART-1 which is shown in the following picture:

Continue with Design Module 3.
Return to the Design Tutorials Overview.