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/*
------------------------------------------------------------------------
File : NoiseRaw.c
Project : Gentrop
Version : 1.0.0
Author : GioDim
Comment : Arduino sketch
History :
24.02.2018 - Release 1.0.0
------------------------------------------------------------------------
Copyleft 2018 GioDim <giodim@autistici.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
------------------------------------------------------------------------
*/
/*
------------------------------------------------------------------------
Define
------------------------------------------------------------------------
*/
# define NOISE_PIN 7
# define BUF_LEN 256
# define DELAY 2
# define BAUD_RATE 115200
# define NUM_BITS 8
# define FIRST_BIT 0
# define SECOND_BIT 1
/*
------------------------------------------------------------------------
Global
------------------------------------------------------------------------
*/
int
Status = FIRST_BIT,
Noise = 0,
Noise_A = 0,
Noise_B = 0,
Bits = 0,
Line = 0;
uint8_t
Result = 0,
Buf [BUF_LEN];
/*
------------------------------------------------------------------------
Function : setup
Input :
Output :
Comment :
------------------------------------------------------------------------
*/
void setup ()
{
pinMode (NOISE_PIN, INPUT);
Serial.begin (BAUD_RATE);
for (int i = 0; i < BUF_LEN; i++)
Buf [i] = 0;
}
/*
------------------------------------------------------------------------
Function : loop
Input :
Output :
Comment :
------------------------------------------------------------------------
*/
void loop ()
{
uint8_t
pause = 0;
int
i = 0,
j = 0;
// Read noise bit
Noise = digitalRead (NOISE_PIN);
if (Status == FIRST_BIT)
{
// First bit
Noise_A = Noise;
Status = SECOND_BIT;
}
else
{
// Second bit
Noise_B = Noise;
Status = FIRST_BIT;
// Skip if bits are equal
if (Noise_A != Noise_B)
{
// Store bit in byte
Result <<= 1;
Result |= Noise_A;
if (++Bits == NUM_BITS)
{
// Store byte in buffer
Buf [Line++] = Result;
if (Line == BUF_LEN)
{
// Send buffer
Serial.write (Buf, BUF_LEN);
Line = 0;
}
Result = 0;
Bits = 0;
}
}
}
// Delay loops
for (i = 0; i < DELAY; i++)
for (j = 0; j < DELAY; j++)
pause++;
}

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README.md Normal file
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