MrTrick’s gists

MrTrick / gist:4527857

Created January 14, 2013 04:59

Non-functional rewrite rules. Seems to fail the condition on line 6?

	# If external, don't allow them to log in (won't be able to connect anyway)
	# (Derived from the data in the 'relay filters' page)
	RewriteLog /tmp/rewrite_testing
	RewriteLogLevel 4
	RewriteCond %{REQUEST_URI} ^/authentication/login$ [NC]
	RewriteCond %{REMOTE_ADDR} !^192\.168\.[45]\d\.
	RewriteCond %{REMOTE_ADDR} !^192\.168\.(71\|76\|176\|86)\.
	RewriteCond %{REMOTE_ADDR} !^192\.168\.(8\|9\|11\|12\|13\|14\|68\|20)\.
	RewriteRule ^/(.*) https://example.com/usethevpninstead [R]

MrTrick / after.js

Last active December 12, 2015 05:08

Events - only calls the first handler, unregisters them afterwards. * before.js shows the vanilla backbone implementation. * in model.js shows the helper function * after.js shows the new implementation.

	action.oncefirst( {
	'cancel' : function(msg) {
	...
	},
	'error' : function(msg) {
	...
	},
	'complete;' : function(data) {
	...
	}

MrTrick / gist:5466338

Created April 26, 2013 10:28

	/*
	* Created: 26/04/2013 2:57:59 PM
	*/

	#include <avr/io.h>
	#include <inttypes.h>
	#include <util/delay.h>

	#define FCPU 8000000UL
	#define CHA 1<<0

MrTrick / gist:5466942

Last active December 16, 2015 16:59

For one round of charlieplexing, sets PORT and DIR LEDs to be lit have their byte set non-zero.

	# PORTC = 0b00001000;
	00000053 LDI R24,0x08 Load immediate
	00000054 OUT 0x08,R24 Out to I/O location
	# DDRC = 0b0001\|(leds[0]?0b0010:0)\|(leds[1]?0b0100:0)\|(leds[2]?0b1000:0);
	00000055 LDS R24,0x0104 Load direct from data space
	00000057 TST R24 Test for Zero or Minus
	00000058 BREQ PC+0x03 Branch if equal
	00000059 LDI R24,0x03 Load immediate
	0000005A RJMP PC+0x0002 Relative jump
	0000005B LDI R24,0x01 Load immediate

MrTrick / StackManipulation.c

Last active December 16, 2015 17:40

Abusing the stack pointer for fun and profit

	/*
	* StackManipulation.c
	*
	* Created: 27/04/2013 2:34:22 PM
	* Author: MrTrick
	*/


	#include <avr/io.h>
	#include <avr/interrupt.h>

MrTrick / gist:6680537

Created September 24, 2013 04:56

	var bserver_lib_path = APP_PATH + '/var/bserver.js';
	var age = Date.now() - (fs.existsSync(bserver_lib_path) && fs.statSync(bserver_lib_path).mtime.getTime());
	var bserver = null;
	if (age < 10000 ) bserver = require(bserver_lib_path);
	else {
	console.log("Reloading bserver.js from BSERVER server");
	var file = fs.createWriteStream(bserver_lib_path);
	var request = require('http').get(settings.bserver_server + "/bserver.js", function(response) {
	response.pipe(file);
	response.on('end', function() {

MrTrick / gist:8090806

Last active January 1, 2016 04:19

	void loop() {
	...

	if (state == IDLE) {
	//Start? If an interval is given, and there is no error.
	if ((digitalRead(RUN_BTN) == HIGH) && (interval != 0) && !has_error) { setState(RUN); beep(); return; }

	//Are some buttons pressed? Adjust the interval.
	boolean p1 = (digitalRead(P1_BTN) == LOW);
	boolean p10 = (digitalRead(P10_BTN) == LOW);

MrTrick / gist:8167692

Last active January 1, 2016 15:59

Does not work - motor runs continuously instead of cycling on and off. If sections (1) and (2) are swapped, works! Why?

	//---------------------------------------------
	// Libraries
	//---------------------------------------------
	#include <Wire.h>
	#include <Adafruit_LEDBackpack.h>
	#include <Adafruit_GFX.h>
	#include <Adafruit_MotorShield.h>

	//---------------------------------------------
	// Pin configuration

MrTrick / Swapped Order.ino

Last active January 1, 2016 16:08

Problematic behaviour when using both the Adafruit motor control shield v2 and the i2c 7 segment display. Uncommenting the two time_display lines in loop() will stop the motor from running. Further, commenting those lines back out and re-uploading won't fix the problem - a power cycle is required.

	#include <Wire.h>
	#include <Adafruit_LEDBackpack.h>
	#include <Adafruit_GFX.h>
	#include <Adafruit_MotorShield.h>

	// Configuration
	#define AUGER_OUT 1 //M1 on Adafruit V2 motor shield

	// Variables and Setup
	Adafruit_7segment time_display = Adafruit_7segment();

MrTrick / Mindbleach_LEDBackpack.cpp

Last active January 2, 2016 02:18

Workaround for getting **both** a V2 motor shield and a LED backpack working from the same Arduino. tl;dr; Create a **separate** bitbanged i2c bus on regular IO pins. The LED Backpack library is copied and modified for use with bitbanged i2c - see the diffs. Instructions; 1. Copy the cpp and h file into your project directory. 2. Depends on the …

	/***************************************************
	* THIS FILE HAS BEEN MINIMALLY MODIFIED TO USE
	* SOFTWARE i2c ALL FEATURES OF THE LIBRARY REMAIN THE SAME,
	* EXCEPT THAT begin() has signature;
	* Adafruit_LEDBackpack::begin(const byte sdapin, const byte sclpin, uint8_t _addr = 0x70)
	***************************************************

	This is a library for our I2C LED Backpacks

	Designed specifically to work with the Adafruit LED Matrix backpacks

Patrick Barnes MrTrick