Tom Vijlbrief tomtor

Interested in controllers/CPUs (ESP,ARM,AVR,PowerPC/Risc-V), FPGAs (Verilog, Yosys, Xilinx Vivado) and many OS-projects

tomtor / rdtape.c

Created March 19, 2016 22:40

Convert SIMH simulator tapes to normal files

	#include <stdio.h>
	#include <string.h>
	#include <stdlib.h>

	/*
	* Convert SIMH simulator tapes to normal files
	*
	* Copyright 2016 Tom Vijlbrief
	*
	* tvijlbrief at gmail dot com

tomtor / MendixWidgetWrapper.html

Created May 26, 2016 15:57

A simple Wrapper for Mendix Widgets

	<html>
	<head>
	<script src="../lib/jquery-1-11-3.js"></script>
	</head>
	<body>
	<script>
	function declare_f(w, a, p) {
	p.domNode= $('body')[0];
	p._contextObj= { set: function(k,v) { console.log(v); }};

tomtor / json-func.sql

Created June 17, 2016 07:05

	-- See
	-- http://stackoverflow.com/questions/18209625/how-do-i-modify-fields-inside-the-new-postgresql-json-datatype
	-- All credits to the original author
	---------------------------------------------------------------------------------------------------------------

	CREATE OR REPLACE FUNCTION "json_object_set_key"(
	"json" json,
	"key_to_set" TEXT,
	"value_to_set" anyelement
	)

tomtor / epsg28992.sql

Last active June 17, 2016 13:28

	----------------------------------------------------------------------------
	-- CRS conversion functions for GeoJSON coordinates and lat/long pairs
	-- in PostgreSQL/PostGIS:
	--
	-- from (Google) Web Mercator (OpenLayers:900913, EPSG:3785 and EPSG:3857 (prefered))
	-- and WGS-84 Lat (y) Long (x) (EPSG:4326)
	--
	-- to EPSG:28992 (RD new)
	--
	-- Needs the PostGIS extension (surprise ;-)

tomtor / stm32_sleep.ino

Last active December 4, 2023 10:53

stm32 low power sleep code

	#include <libmaple/pwr.h>
	#include <libmaple/scb.h>

	#include <RTClock.h>

	// Define the Base address of the RTC registers (battery backed up CMOS Ram), so we can use them for config of touch screen or whatever.
	// See http://stm32duino.com/viewtopic.php?f=15&t=132&hilit=rtc&start=40 for a more details about the RTC NVRam
	// 10x 16 bit registers are available on the STM32F103CXXX more on the higher density device.
	#define BKP_REG_BASE ((uint32_t *)(0x40006C00 + 0x04))

tomtor / STM32-LORA.ino

Last active October 14, 2022 12:46

stm32duino LORA Example

	/*******************************************************************************
	Copyright (c) 2015 Thomas Telkamp and Matthijs Kooijman
	(c) 2017 Tom Vijlbrief

	Permission is hereby granted, free of charge, to anyone
	obtaining a copy of this document and accompanying files,
	to do whatever they want with them without any restriction,
	including, but not limited to, copying, modification and redistribution.
	NO WARRANTY OF ANY KIND IS PROVIDED.

tomtor / STM32-OTA.ino

Last active October 14, 2022 12:46

STM32 OTA Example

	/*******************************************************************************
	Copyright (c) 2015 Thomas Telkamp and Matthijs Kooijman
	(c) 2017 Tom Vijlbrief

	Permission is hereby granted, free of charge, to anyone
	obtaining a copy of this document and accompanying files,
	to do whatever they want with them without any restriction,
	including, but not limited to, copying, modification and redistribution.
	NO WARRANTY OF ANY KIND IS PROVIDED.

tomtor / CCS811_test.ino

Last active June 2, 2017 13:46

CCS811 low power Arduino sketch

	/***************************************************
	This is an example for the CCS811 digital TVOC/eCO2 Sensor by CCMOSS/AMS
	http://www.ccmoss.com/gas-sensors#CCS811

	Updated: March 28, 2017

	The sensor uses I2C protocol to communicate, and requires 2 pins - SDA and SCL
	Another GPIO is also required to assert the WAKE pin for communication. this
	pin is passed by an argument in the begin function.

tomtor / STM32-OTA-CCS811.ino

Last active August 19, 2017 13:47

	/*******************************************************************************
	Copyright (c) 2015 Thomas Telkamp and Matthijs Kooijman
	(c) 2017 Tom Vijlbrief

	Permission is hereby granted, free of charge, to anyone
	obtaining a copy of this document and accompanying files,
	to do whatever they want with them without any restriction,
	including, but not limited to, copying, modification and redistribution.
	NO WARRANTY OF ANY KIND IS PROVIDED.

tomtor / ESP32-ULP-Blink-DHT22.ino

Last active August 19, 2020 08:53

ESP32: ULP LED Hart beat and read DHT22 sensor

	/*
	Blink ULP Hartbeat and read DHT22 in ULP code

	Tom Vijlbrief oct 2017
	*/

	#include <time.h>
	#include <sys/time.h>

	#include "driver/rtc_io.h"