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This commit is contained in:
jLynx
2023-05-19 08:16:05 +12:00
committed by GitHub
parent 7aca7ce74d
commit 033c4e9a5b
599 changed files with 70746 additions and 66896 deletions
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103
firmware/common/manchester.cpp
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@@ -24,73 +24,72 @@
#include "string_format.hpp"
size_t ManchesterBase::symbols_count() const {
return packet.size() / 2;
return packet.size() / 2;
}
DecodedSymbol ManchesterDecoder::operator[](const size_t index) const {
const size_t encoded_index = index * 2;
if( (encoded_index + 1) < packet.size() ) {
const auto value = packet[encoded_index + sense];
const auto error = packet[encoded_index + 0] == packet[encoded_index + 1];
return { value, error };
} else {
return { 0, 1 };
}
const size_t encoded_index = index * 2;
if ((encoded_index + 1) < packet.size()) {
const auto value = packet[encoded_index + sense];
const auto error = packet[encoded_index + 0] == packet[encoded_index + 1];
return {value, error};
} else {
return {0, 1};
}
}
DecodedSymbol BiphaseMDecoder::operator[](const size_t index) const {
const size_t encoded_index = index * 2;
if( (encoded_index + 1) < packet.size() ) {
const auto value = packet[encoded_index + 0] != packet[encoded_index + 1];
const uint_fast8_t error = encoded_index ? (packet[encoded_index - 1] == packet[encoded_index + 0]) : 0;
return { value, error };
} else {
return { 0, 1 };
}
const size_t encoded_index = index * 2;
if ((encoded_index + 1) < packet.size()) {
const auto value = packet[encoded_index + 0] != packet[encoded_index + 1];
const uint_fast8_t error = encoded_index ? (packet[encoded_index - 1] == packet[encoded_index + 0]) : 0;
return {value, error};
} else {
return {0, 1};
}
}
FormattedSymbols format_symbols(
const ManchesterBase& decoder
) {
const size_t payload_length_decoded = decoder.symbols_count();
const size_t payload_length_hex_characters = (payload_length_decoded + 3) / 4;
const size_t payload_length_symbols_rounded = payload_length_hex_characters * 4;
const ManchesterBase& decoder) {
const size_t payload_length_decoded = decoder.symbols_count();
const size_t payload_length_hex_characters = (payload_length_decoded + 3) / 4;
const size_t payload_length_symbols_rounded = payload_length_hex_characters * 4;
std::string hex_data;
std::string hex_error;
hex_data.reserve(payload_length_hex_characters);
hex_error.reserve(payload_length_hex_characters);
std::string hex_data;
std::string hex_error;
hex_data.reserve(payload_length_hex_characters);
hex_error.reserve(payload_length_hex_characters);
uint_fast8_t data = 0;
uint_fast8_t error = 0;
for(size_t i=0; i<payload_length_symbols_rounded; i++) {
const auto symbol = decoder[i];
uint_fast8_t data = 0;
uint_fast8_t error = 0;
for (size_t i = 0; i < payload_length_symbols_rounded; i++) {
const auto symbol = decoder[i];
data <<= 1;
data |= symbol.value;
data <<= 1;
data |= symbol.value;
error <<= 1;
error |= symbol.error;
error <<= 1;
error |= symbol.error;
if( (i & 3) == 3 ) {
hex_data += to_string_hex(data & 0xf, 1);
hex_error += to_string_hex(error & 0xf, 1);
}
}
if ((i & 3) == 3) {
hex_data += to_string_hex(data & 0xf, 1);
hex_error += to_string_hex(error & 0xf, 1);
}
}
return { hex_data, hex_error };
return {hex_data, hex_error};
}
void manchester_encode(uint8_t * dest, uint8_t * src, const size_t length, const size_t sense) {
uint8_t part = sense ? 0 : 0xFF;
for (size_t c = 0; c < length; c++) {
if ((src[c >> 3] << (c & 7)) & 0x80) {
*(dest++) = part;
*(dest++) = ~part;
} else {
*(dest++) = ~part;
*(dest++) = part;
}
}
void manchester_encode(uint8_t* dest, uint8_t* src, const size_t length, const size_t sense) {
uint8_t part = sense ? 0 : 0xFF;
for (size_t c = 0; c < length; c++) {
if ((src[c >> 3] << (c & 7)) & 0x80) {
*(dest++) = part;
*(dest++) = ~part;
} else {
*(dest++) = ~part;
*(dest++) = part;
}
}
}