pulsar256

Opus p2p streaming

Low latency streaming of ogg compressed audio data between two peers using RTP and gstreamer-1.0. Expected latency over the network is below 1 second.

Producer

The producer will provide a Jack sink which needs to be connected to a audio producer.

TARGET_PORT=5100

pulsar256

/**
 * according to http://www.adafruit.com/datasheets/UG-2864HSWEG01.pdf Chapter 4.4 Page 15
 */
void ssd1306Init(void)
{
    i2c_OLED_send_cmd(0xAE); // Set display OFF		
 
    i2c_OLED_send_cmd(0xD4); // Set Display Clock Divide Ratio / OSC Frequency
    i2c_OLED_send_cmd(0x80); // Display Clock Divide Ratio / OSC Frequency 
 

pulsar256

Hetzner Primary IPv4 IP + IPv4/2x Subnet + "Non-Routed" IPv6/64 Subnet HowTo

... so I do not forget the next time I have to figure this stuff out. And perhaps to help other poor souls fiddling with v6/v4 xen setups in a Hetzner network environment.

Basic setup

You can basically follow along the Xen Project Beginners Guide.

The short version

Install Debian Wheezy via Hetzner's installimage on the rescue system, the only important part about partitioning is that you have an LVM volume group named vg0 with enough space for your guests' disks.

pulsar256

#!/bin/sh -e
# based on https://gist.github.com/corny/7a07f5ac901844bd20c9

hostname=$1
device=$2

v4_file=$HOME/.${hostname}.dynv6.addr4

[ -e $v4_file ] && old=`cat $v4_file`

pulsar256

#!/bin/bash

pin_reset=22
pin_boot=26
firmware=$HOME/klipper/out/klipper.bin

sudo systemctl stop klipper

# enter boot bootloader sequence
gpio mode $pin_reset OUT

pulsar256

import 'dart:async';
import 'dart:io';

import 'dart:math';

StreamController<int> controller = StreamController();

Future<void> main() async {
  final paths = [for (var i = 0; i < 100; i++) "path $i"];

pulsar256

extension on Iterator {
  void throttledForEach(int parallelFutures, ForEachCallback onData,
      [ItemProcessedCallback onProgress]) async {
    final semaphores = StreamController<int>();
    while (parallelFutures-- > 0) {
      semaphores.add(1);
    }
    await for (var _ in semaphores.stream) {
      if (!moveNext()) break;
      var f = onData(current)

pulsar256

[stepper_x]
step_pin: P2.2
dir_pin: !P2.6
enable_pin: !P2.1
step_distance: .0125
endstop_pin: !P1.29  # P1.28 for X-max
position_endstop: 0
position_max: 320
homing_speed: 50

pulsar256

#!/bin/bash

# Flashes a LPC based boards over the serial line connected to the GPIO headers of a RPI. 
# In addition to the TX/RX lines you will also need to connect the BOOT and RESET lines.
# This configuration uses GPIO6 for RESET and GPIO12 for BOOT. Pin numbering is using 
# the wiring standard.

pin_reset=22
pin_boot=26
firmware=$HOME/klipper/out/klipper.bin

pulsar256

// workaround for https://code.google.com/p/gdata-issues/issues/detail?id=7163

var d0 = "AEIMQUYcgkosw048";
var d1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var d2 = d1;
var d1c = 0;
var d2c = 0;
var overflowSuffix = "Q";
var direction = "AA";
var d2OverflowCounter = 0;