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/*
Copyright (c) 2016 CurlyMo <curlymoo1@gmail.com>
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include "wiringx.h"
int main() {
if(wiringXSetup("raspberrypi3", NULL) == -1) {
wiringXGC();
return -1;
}
pinMode(9, PINMODE_OUTPUT);
digitalWrite(9, HIGH);
pinMode(9, PINMODE_INPUT);
pinMode(8, PINMODE_OUTPUT);
while(1) {
// start bit
digitalWrite(8, HIGH);
usleep(18000);
digitalWrite(8, LOW);
long int cycles = 0;
int last_state = digitalRead(9);
// ignore 2 bits: reaction on command + "official" start bit
int bit = -2;
char data[5];
memset(&data[0], 0, 5);
while (cycles < 100000) {
cycles++;
if (last_state == digitalRead(9))
continue;
if (last_state == 1) {
if (bit >= 0) {
if (cycles>400) {
printf("1");
data[bit / 8] |= 1 << 7 - (bit % 8);
} else
printf("0");
if ((bit+1) % 8 == 0)
printf(" ");
}
bit++;
}
cycles = 0;
last_state = 1-last_state;
}
if ((bit == 40) && ((data[0]+data[1]+data[2]+data[3]-data[4]) % 255 == 0))
printf(" %f %f", data[0] + data[1]/256., data[2] + data[3]/256.);
printf("\n\n");
sleep(2);
}
}
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