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Niklas Fiekas niklasf

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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
niklasf / timer.c
Created January 28, 2014 14:02
#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdio.h>
#include <stdlib.h>
#define C2
#define DDR_SPI DDRB
#define PORT_SPI PORTB
#define DD_MOSI DDB2
@niklasf
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
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
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
niklasf / spi.c
Created January 7, 2014 13:39
/*
* GccApplication1.c
*
* Created: 19.11.2013 13:22:54
* Author: ese1-30
*/
#include <avr/io.h>
#include <util/delay.h>
@niklasf
niklasf / 8-8-8-8-switch.png
Last active December 28, 2015 07:29
8-8-8-8 Switch Dia Shape
8-8-8-8-switch.png
@niklasf
niklasf / 8-8-8-2-switch.png
Last active December 28, 2015 07:29
8-8-8-2 Switch Dia shape
8-8-8-2-switch.png
@niklasf
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
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)))