jdrew1303

jdrew1303

# show message definition
rosmsg show sensor_msgs/CameraInfo

# show message type
rostopic type rosout

# quick message definition view
rostopic type rosout | rosmsg show

# echo message live content

jdrew1303

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Copyright 2016 Massachusetts Institute of Technology

"""Publish a video as ROS messages.
"""

import argparse

jdrew1303

# sudo apt-get install python-picamera

import picamera
from time import sleep 

camera = picamera.PiCamera() 
camera.capture('image.jpg') 
camera.start_preview() 
camera.vflip = True
camera.hflip = True 

jdrew1303

Duckietown Specific:

• Old docs (better setup descriptions)

Understanding the raspberry pi hardware and optimising for it:

• Build OpenCV with Neon,VFPV3 and Intel TBB
• GCC compiler optimization for ARM-based systems
• Raspberry Pi Clock Speed and Temperature
• Alasdair Allan Blogs on Ras Pi, AI and Edge Computing
• Benchmarking Edge Computing

jdrew1303

Typing vagrant from the command line will display a list of all available commands.

Be sure that you are in the same directory as the Vagrantfile when running these commands!

Creating a VM

• vagrant init -- Initialize Vagrant with a Vagrantfile and ./.vagrant directory, using no specified base image. Before you can do vagrant up, you'll need to specify a base image in the Vagrantfile.
• vagrant init <boxpath> -- Initialize Vagrant with a specific box. To find a box, go to the public Vagrant box catalog. When you find one you like, just replace it's name with boxpath. For example, vagrant init ubuntu/trusty64.

Starting a VM

• vagrant up -- starts vagrant environment (also provisions only on the FIRST vagrant up)

jdrew1303

GCC compiler optimization for ARM-based systems

2017-03-03 fm4dd

The gcc compiler can optimize code by taking advantage of CPU specific features. Especially for ARM CPU's, this can have impact on application performance. ARM CPU's, even under the same architecture, could be implemented with different versions of floating point units (FPU). Utilizing full FPU potential improves performance of heavier operating systems such as full Linux distributions.

-mcpu, -march: Defining the CPU type and architecture

These flags can both be used to set the CPU type. Setting one or the other is sufficient.

jdrew1303

[
  {
    "name": "Type: Help Needed",
    "color": "5319e7"
  },
  {
    "name": "Priority: Critical",
    "color": "ff2222"
  },
  {

jdrew1303

sudo apt-get update

# Set up basic development packages
sudo apt-get install -y python3.7 python3-pip git git-lfs curl wget

# Set up docker
sudo apt-get install -y apt-transport-https ca-certificates curl gnupg-agent software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo apt-key fingerprint 0EBFCD88
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

jdrew1303

const {Success, Failure} = require( 'folktale/validation');
const R = require('ramda');

const isRequired = (form, field) => !!form[field].trim()
    ? Success([])
    : Failure(["This field is required"])

const isEmail = (form, field) => /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/.test(form[field])
    ? Success([])
    : Failure([`${form[field]} doesn't seem to be an email`])