VE7UWU/sdrangel
1
0
Fork 0
mirror of https://github.com/f4exb/sdrangel.git synced 2026-06-19 06:08:51 -04:00
Code Issues Projects Releases Wiki Activity

LoRa demod: implement LoRa

Browse Source
This commit is contained in:
f4exb
2020-02-19 09:26:42 +01:00
parent c6f8ac2ca4
commit be2ca2d0fd
21 changed files with 1592 additions and 243 deletions
Download Patch File Download Diff File Expand all files Collapse all files
plugins/channelrx/demodlora/lorademoddecoder.cpp
+48 -71
View File
@@ -16,98 +16,75 @@
///////////////////////////////////////////////////////////////////////////////////
#include "lorademoddecoder.h"
const char LoRaDemodDecoder::ttyLetters[32] = {
'\0', 'E', '\n', 'A', ' ', 'S', 'I', 'U',
'\r', 'D', 'R', 'J', 'N', 'F', 'C', 'K',
'T', 'Z', 'L', 'W', 'H', 'Y', 'P', 'Q',
'O', 'B', 'G', ' ', 'M', 'X', 'V', ' '
};
const char LoRaDemodDecoder::ttyFigures[32] = { // U.S. standard
'\0', '3', '\n', '-', ' ', '\a', '8', '7',
'\r', '$', '4', '\'', ',', '!', ':', '(',
'5', '"', ')', '2', '#', '6', '0', '1',
'9', '?', '&', ' ', '.', '/', ';', ' '
};
#include "lorademoddecodertty.h"
#include "lorademoddecoderascii.h"
#include "lorademoddecoderlora.h"
LoRaDemodDecoder::LoRaDemodDecoder() :
m_codingScheme(LoRaDemodSettings::CodingTTY),
m_nbSymbolBits(5)
m_nbSymbolBits(5),
m_nbParityBits(1),
m_hasCRC(true),
m_hasHeader(true)
{}
LoRaDemodDecoder::~LoRaDemodDecoder()
{}
void LoRaDemodDecoder::decodeSymbols(const std::vector<unsigned int>& symbols, QString& str)
void LoRaDemodDecoder::setNbSymbolBits(unsigned int spreadFactor, unsigned int deBits)
{
m_spreadFactor = spreadFactor;
if (deBits >= spreadFactor) {
m_deBits = m_spreadFactor - 1;
} else {
m_deBits = deBits;
}
m_nbSymbolBits = m_spreadFactor - m_deBits;
}
void LoRaDemodDecoder::decodeSymbols(const std::vector<unsigned short>& symbols, QString& str)
{
switch(m_codingScheme)
{
case LoRaDemodSettings::CodingTTY:
decodeSymbolsTTY(symbols, str);
if (m_nbSymbolBits == 5) {
LoRaDemodDecoderTTY::decodeSymbols(symbols, str);
}
break;
case LoRaDemodSettings::CodingASCII:
decodeSymbolsASCII(symbols, str);
if (m_nbSymbolBits == 5) {
LoRaDemodDecoderASCII::decodeSymbols(symbols, str);
}
break;
default:
break;
}
}
void LoRaDemodDecoder::decodeSymbols(const std::vector<unsigned int>& symbols, QByteArray& bytes)
void LoRaDemodDecoder::decodeSymbols(const std::vector<unsigned short>& symbols, QByteArray& bytes)
{
}
void LoRaDemodDecoder::decodeSymbolsASCII(const std::vector<unsigned int>& symbols, QString& str)
{
if (m_nbSymbolBits != 7) {
return;
}
std::vector<unsigned int>::const_iterator it = symbols.begin();
QByteArray bytes;
for (; it != symbols.end(); ++it) {
bytes.push_back(*it & 0x7F);
}
str = QString(bytes.toStdString().c_str());
}
void LoRaDemodDecoder::decodeSymbolsTTY(const std::vector<unsigned int>& symbols, QString& str)
{
if (m_nbSymbolBits != 5) {
return;
}
std::vector<unsigned int>::const_iterator it = symbols.begin();
QByteArray bytes;
TTYState ttyState = TTYLetters;
for (; it != symbols.end(); ++it)
switch(m_codingScheme)
{
char ttyChar = *it & 0x1F;
if (ttyChar == lettersTag) {
ttyState = TTYLetters;
} else if (ttyChar == figuresTag) {
ttyState = TTYFigures;
}
else
case LoRaDemodSettings::CodingLoRa:
if (m_nbSymbolBits >= 5)
{
char asciiChar = -1;
if (ttyState == TTYLetters) {
asciiChar = ttyLetters[ttyChar];
} else if (ttyState == TTYFigures) {
asciiChar = ttyFigures[ttyChar];
}
if (asciiChar >= 0) {
bytes.push_back(asciiChar);
}
LoRaDemodDecoderLoRa::decodeBytes(
bytes,
symbols,
m_nbSymbolBits,
m_hasHeader,
m_hasCRC,
m_nbParityBits,
m_packetLength,
m_errorCheck,
m_headerParityStatus,
m_headerCRCStatus,
m_payloadParityStatus,
m_payloadCRCStatus
);
}
break;
}
str = QString(bytes.toStdString().c_str());
}