Niklas Fiekas niklasf

niklasf / calculator.c

Created February 5, 2014 13:11

	#include <avr/io.h>

	void USART_Init( unsigned int ubrr){
	/* Set baud rate */
	UBRR1H = (unsigned char)(ubrr>>8);
	UBRR1L = (unsigned char)ubrr;
	/* Enable receiver and transmitter */
	UCSR1B = (1<<RXEN1)\|(1<<TXEN1);
	/* Set frame format: 8data, 2stop bit */
	UCSR1C = (1<<USBS1)\|(1<<UCSZ11)\|(1<<UCSZ10);

niklasf / timer.c

Created January 28, 2014 14:02

niklasf / sleep.c

Created January 21, 2014 14:16

	#include <avr/io.h>

	void sleep(const int milliseconds) {
	for (int j = 0; j < milliseconds; j++) {
	for (int i = 0; i < (8000 / 18 - 28); i++);
	}
	}

	int main()
	{

niklasf / interrupts-16-keys.c

Created January 21, 2014 13:29

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

	void display_internal(uint8_t mask, uint8_t c)
	{
	uint8_t bm = mask == 0x0F ? 0b00000000 : 0b00001000;
	uint8_t sh = mask == 0x0F ? 0 : 4;

	if ((c & mask) >> sh == 0x00) {

niklasf / isr.c

Created January 7, 2014 14:08

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

	void display_internal(uint8_t mask, uint8_t c)
	{
	uint8_t bm = mask == 0x0F ? 0b00000000 : 0b00001000;
	uint8_t sh = mask == 0x0F ? 0 : 4;

	if ((c & mask) >> sh == 0x00) {

niklasf / spi.c

Created January 7, 2014 13:39

niklasf / 8-8-8-8-switch.png

Last active December 28, 2015 07:29

8-8-8-8 Switch Dia Shape

niklasf / 8-8-8-2-switch.png

Last active December 28, 2015 07:29

8-8-8-2 Switch Dia shape

niklasf / title_and_description_delegate.cpp

Last active January 3, 2018 20:00

A Qt QItemDelegate that shows a bold title above a description text. Could also be used to render more general rich text in QTableView and co.

	#include "title_and_description_delegate.h"

	void TitleAndDescriptionDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
	{
	m_paintingIndex = index;
	QItemDelegate::paint(painter, option, index);
	}

	void TitleAndDescriptionDelegate::drawDisplay(QPainter *painter, const QStyleOptionViewItem &option, const QRect &rect, const QString &text) const
	{

niklasf / matrixmult.py

Last active December 17, 2015 08:39

An O(n^2.81) n-x-n-matrix multiplication algorithm.

	#!/usr/bin/env python
	# -- coding: utf-8 --

	import unittest

	def multiply(A, B):
	if len(A) == 1:
	return [[ A[0][0] * B[0][0] ]]
	elif len(A) % 2 == 1:
	return shrink(multiply(expand(A), expand(B)))