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Update WT450 code style

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This commit is contained in:
Christian W. Zuckschwerdt 2019-02-15 17:14:24 +01:00
parent 46aaa6fd89
commit 7aed8133e0
1 changed files with 68 additions and 82 deletions

150
src/devices/wt450.c
View file

@ -1,80 +1,74 @@
/* wt450 wireless weather sensors protocol
*
* Tested devices:
* WT260H
* WT405H
*
* Copyright (C) 2015 Tommy Vestermark
* Copyright (C) 2015 Ladislav Foldyna
* 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.
/** @file
WT450 wireless weather sensors protocol.
Tested devices:
WT260H
WT405H
Copyright (C) 2015 Tommy Vestermark
Copyright (C) 2015 Ladislav Foldyna
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.
*/
/*
source from:
http://ala-paavola.fi/jaakko/doku.php?id=wt450h
/**
source from:
http://ala-paavola.fi/jaakko/doku.php?id=wt450h
- The signal is FM encoded with clock cycle around 2000 µs
- No level shift within the clock cycle translates to a logic 0
- One level shift within the clock cycle translates to a logic 1
- Each clock cycle begins with a level shift
- My timing constants defined below are those observed by my program
The signal is FM encoded with clock cycle around 2000 µs
No level shift within the clock cycle translates to a logic 0
One level shift within the clock cycle translates to a logic 1
Each clock cycle begins with a level shift
My timing constants defined below are those observed by my program
+---+ +---+ +-------+ + high
| | | | | | |
| | | | | | |
+ +---+ +---+ +-------+ low
^ ^ ^ ^ ^ clock cycle
| 1 | 1 | 0 | 0 | translates as
+---+ +---+ +-------+ + high
| | | | | | |
| | | | | | |
+ +---+ +---+ +-------+ low
^ ^ ^ ^ ^ clock cycle
| 1 | 1 | 0 | 0 | translates as
Each transmission is 36 bits long (i.e. 72 ms).
Each transmission is 36 bits long (i.e. 72 ms)
Data is transmitted in pure binary values, NOT BCD-coded.
Data is transmitted in pure binary values, NOT BCD-coded.
Outdoor sensor transmits data temperature, humidity.
Transmissions also include channel code and house code. The sensor transmits
every 60 seconds 3 packets.
1100 0001 | 0011 0011 | 1000 0011 | 1011 0011 | 0001
xxxx ssss | ccxx bhhh | hhhh tttt | tttt tttt | tttp
- x: constant
- s: House code
- c: Channel
- b: battery indicator (0=>OK, 1=>LOW)
- h: Humidity
- t: Temperature
- p: parity (xor of all bits should give 0)
*/
/*
* Outdoor sensor transmits data temperature, humidity.
* Transmissions also include channel code and house code. The sensor transmits
* every 60 seconds 3 packets.
*
* 1100 0001 | 0011 0011 | 1000 0011 | 1011 0011 | 0001
* xxxx ssss | ccxx bhhh | hhhh tttt | tttt tttt | tttp
*
* x - constant
* s - House code
* c - Channel
* b - battery indicator (0=>OK, 1=>LOW)
* h - Humidity
* t - Temperature
* p - parity (xor of all bits should give 0)
*/
#include "decoder.h"
static int wt450_callback(r_device *decoder, bitbuffer_t *bitbuffer) {
static int wt450_callback(r_device *decoder, bitbuffer_t *bitbuffer)
{
bitrow_t *bb = bitbuffer->bb;
uint8_t *b = bb[0];
uint8_t humidity = 0;
uint8_t temp_whole = 0;
uint8_t temp_fraction = 0;
uint8_t house_code = 0;
uint8_t channel = 0;
uint8_t battery_low = 0;
float temp = 0;
uint8_t humidity;
uint8_t temp_whole;
uint8_t temp_fraction;
uint8_t house_code;
uint8_t channel;
uint8_t battery_low;
float temp;
uint8_t bit;
uint8_t parity = 0;
uint8_t parity;
data_t *data;
//bitbuffer_print(bitbuffer);
if ( bitbuffer->bits_per_row[0] != 36 )
{
if (bitbuffer->bits_per_row[0] != 36) {
if (decoder->verbose)
fprintf(stderr, "wt450_callback: wrong size of bit per row %d\n",
bitbuffer->bits_per_row[0]);
@ -82,38 +76,30 @@ static int wt450_callback(r_device *decoder, bitbuffer_t *bitbuffer) {
return 0;
}
if ( b[0]>>4 != 0xC )
{
if (b[0]>>4 != 0xC) {
if (decoder->verbose)
{
fprintf(stderr, "wt450_callback: wrong preamble\n");
bitbuffer_print(bitbuffer);
}
bitbuffer_printf(bitbuffer, "wt450_callback: wrong preamble\n");
return 0;
}
for ( bit = 0; bit < bitbuffer->bits_per_row[0]; bit++ )
{
parity = 0;
for (bit = 0; bit < bitbuffer->bits_per_row[0]; bit++) {
parity ^= (b[bit/8] & (0x80 >> (bit % 8))) ? 1 : 0;
}
if ( parity )
{
if (parity) {
if (decoder->verbose)
{
fprintf(stderr, "wt450_callback: wrong parity\n");
bitbuffer_print(bitbuffer);
}
bitbuffer_printf(bitbuffer, "wt450_callback: wrong parity\n");
return 0;
}
house_code = b[0] & 0xF;
channel = (b[1] >> 6) + 1;
battery_low = b[1] & 0x8;
humidity = ((b[1] & 0x7) << 4) + (b[2] >> 4);
temp_whole = (b[2] << 4) + (b[3] >> 4);
house_code = b[0] & 0xF;
channel = (b[1] >> 6) + 1;
battery_low = b[1] & 0x8;
humidity = ((b[1] & 0x7) << 4) + (b[2] >> 4);
temp_whole = (b[2] << 4) + (b[3] >> 4);
temp_fraction = ((b[3] & 0xF) << 3) + (b[4] >> 5);
temp = (temp_whole - 50) + (temp_fraction/100.0);
temp = (temp_whole - 50) + (temp_fraction / 100.0);
data = data_make(
"model", "", DATA_STRING, "WT450 sensor",
@ -139,7 +125,7 @@ static char *output_fields[] = {
};
r_device wt450 = {
.name = "WT450",
.name = "WT450, WT260H, WT405H",
.modulation = OOK_PULSE_DMC,
.short_width = 980, // half-bit width 980 us
.long_width = 1952, // bit width 1952 us