Martino Facchin facchinm

Preface

I owe my very rapid learning journey in the world of ConfigFs to several key sources which aren't necessarily relevant to this result, but I feel deserve a mention anyway.

This really demystified configfs for me, and stopped me being afraid of it: http://events.linuxfoundation.org/sites/events/files/slides/USB%20Gadget%20Configfs%20API_0.pdf
I borrowed heavily from this Mindstorms EV3 script: https://github.com/ev3dev/ev3-systemd/blob/ev3dev-jessie/scripts/ev3-usb.sh
Desperately trawled this thread for answers: https://answers.microsoft.com/en-us/windows/forum/windows_10-networking-winpc/windows-10-vs-remote-ndis-ethernet-usbgadget-not/cb30520a-753c-4219-b908-ad3d45590447?auth=1
This guide is handy: http://irq5.io/2016/12/22/raspberry-pi-zero-as-multiple-usb-gadgets/

Setup armv7h chroot under x86_64 host (Archlinux/Archlinuxarm biased)

Simple way to setup an arm chroot for building packages for your arm devices. This is an alternative to cross-compiling where you are limited to only linking against the libs in your toolchain.

Setup chroot-fs

You can store the chroot wherever you like. I choose to store it in a disk-image which I mount to my filesystem.

	// This will works on Embedded GPU that implements .gem_prime_mmap like Rockchip ones.
	// This will fail on most DRM drivers for GPU with dedicated memory as they tend to NOT implement .gem_prime_mmap.
	#include <stdio.h>
	#include <libdrm/drm.h>

	#include <stdint.h>

	#include <sys/mman.h>

	#include <string.h>

	"""
	Utilities for dumping STM32 peripheral registers with tab-completion
	Based on a script by vampi-the-frog

	Dependencies:
	pip install -U cmsis-svd

	Usage (inside gdb):

	(gdb) source /path/to/svd-dump.py

	struct MyPrintable : Printable {
	const char *p;
	MyPrintable(const char *p) : p(p) {}
	size_t printTo(Print &P) const {int i; for (i=0; p[i]; i++) P.write(p[i]); return i;}
	};

	void setup() {
	#define FSH F("Flash string")
	String S("String");
	char arr[] = "char array";