disposedtrolley

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGadkc8wu22gfRNsPqkxdpK/y8mKpvT96TWX5OypV5aj james@liu.haus

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When you install a Snap, a .desktop file gets created at /var/lib/snapd/desktop/applications. For example, after running snap install authy, my directory looks like this:

applications ⟩ ls -la                                                                                                            /v/l/s/d/applications
total 8
drwxr-xr-x. 1 root root  66 Nov 20 13:23 ./
drwxr-xr-x. 1 root root  34 Nov 19 14:25 ../
-rwxr-xr-x. 1 root root 377 Nov 19 14:47 authy_authy.desktop*

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session="work"

tmux new-session -d -s $session

# Configure window for main project
tmux selectp -t 0
tmux rename-window main
tmux send-keys "cd ~/projects/foo" C-m

# Configure scratch window

disposedtrolley

This is a basic guide on setting up SPI for the STM32F401RE Nucleo board on Zephyr. We'll be bootstrapping a new Zephyr project with CMake, getting a binding to a SPI peripheral on the STM32, and writing a Hello, Zephyr string over the wire.

While I'll be using an STM32F401RE, the process should be similar for most STM32 microcontrollers with a SPI peripheral. Also worth noting that this won't be an exhaustive tutorial, nor does it contain best practice! I struggled with this for a whole afternoon, so I'm posting it just in the hopes of getting people on the right track.

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Introduction

The ARM Embedded Toolchain is a GNU licensed cross compiler for ARM CPU architectures, allowing you to compile C/C++ code into binaries which can execute on CPUs such as the Cortex-M line of microcontrollers.

When dealing with C/C++ embedded development, you have the choice of several compilers. Keil is probably the most well-known commercial brand in the embedded toolchain space. They have their own proprietary compiler and IDE which is quite popular for commercial applications (it's pricey and only runs on Windows).

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;; -*- mode: emacs-lisp; lexical-binding: t -*-
;; This file is loaded by Spacemacs at startup.
;; It must be stored in your home directory.

(defun dotspacemacs/layers ()
  "Layer configuration:
This function should only modify configuration layer settings."
  (setq-default
   ;; Base distribution to use. This is a layer contained in the directory
   ;; `+distribution'. For now available distributions are `spacemacs-base'

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;; Bits and pieces from reading The Little Schemer, implemented in Racket.

#lang racket

(define (atom? x)
  (and (not (pair? x)) (not (null? x))))

;; Returns whether the supplied s-expression is a list of atoms by
;; recursively checking each element of the input.
(define (lat? l)

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Keybase proof

I hereby claim:

• I am disposedtrolley on github.
• I am jamesliu (https://keybase.io/jamesliu) on keybase.
• I have a public key whose fingerprint is 5A53 9C31 4A93 084D A7C1 C560 20EF BE26 9302 A072

To claim this, I am signing this object: