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Qualcomm Flight RB5 Emulator

Table of contents

  1. Overview
  2. Requirements
  3. Installation
  4. Usage

Overview

The qrb5165-emulator is an armv8 Docker image that runs on your Linux PC to emulate the rb5-flight. This Docker image takes the root filesystem of the system image and builds it on top of the armv8 Docker ‘scratch’ image. This provides developers an off-target workflow for developing for the rb5-flight

Requirements

  • Ubuntu 18.04 host (other versions may work, but have not been tested)
  • Docker
  • QEMU, to install:
# install packages
sudo apt-get install qemu binfmt-support qemu-user-static

# Execute the registering scripts, see https://www.stereolabs.com/docs/docker/building-arm-container-on-x86/
docker run --rm --privileged multiarch/qemu-user-static --reset -p yes

Installation

In order to install the qrb5165-emulator begin by visiting https://downloads.modalai.com and downloading qrb5165-emulator (1.1.1)

Next you can navigate to the directory where the file was installed and load the docker image

cd ~/Downloads # This location may be different for you
docker load < qrb5165-emulator_V1.1.1.tgz

Next make sure that the docker image was loaded

docker images | grep qrb5165-emulator

This should list the qrb5165-emulator

qrb5165-emulator             1.1.1     73f7d7d4a000   6 weeks ago     2.94GB

Finally, run the docker image

docker run --rm -it --privileged \
    --platform linux/arm64/v8 \
    --mount type=bind,source="$(pwd)",target=/home/user \
    qrb5165-emulator:1.1.1 /bin/sh

This will start the docker container and put you into an interactive shell.

Usage

A common use case for the qrb5165-emulator is to compile code in the docker image, and push the binaries on to the rb5-flight. This can be done easily inside the docker container.

Begin by running the docker image. Once inside the interactive shell, begin writing your code.

For this example, we’ll be compiling a hello_world.c example, which contains the following code:

#include <stdio.h>

int main(){
    printf("Hello World\n");
    return 0;
}

You can then compile your code

gcc hello_world.c

Finally, outside of the docker image, you can push your binaries to the rb5-flight , using adb, so that the code can be ran there. In this case, we’ll be pushing our binary to the /data directory

adb push ./a.out /data


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