electronut

//
// Talking to ultrasonic sensor HC-SR04 with an ATtiny84, and 
// sending distance data using serial communications.
//
// electronut.in
//

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

electronut

#define BAUD 9600
#define MYUBRR F_CPU/16/BAUD-1

void USART_Init(unsigned int ubrr)
{
  /*Set baud rate */
  UBRR0H = (unsigned char)(ubrr>>8);
  UBRR0L = (unsigned char)ubrr;
  /*Enable receiver and transmitter */
  UCSR0B = (1<<RXEN0)|(1<<TXEN0);

gorlum0

#!/usr/bin/env python
from __future__ import division
import numpy as np
import matplotlib.pyplot as plt
from scipy import optimize
from numpy import newaxis, r_, c_, mat, e
from numpy.linalg import *

def plotData(X, y):
    #pos = (y.ravel() == 1).nonzero()