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Added switching message length

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Improves detections in test file from 77 to 80
This commit is contained in:
heurist1 2021-10-30 00:53:29 +01:00
parent b499380448
commit 0d7bbac6a1
2 changed files with 7 additions and 1 deletions
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7
firmware/baseband/proc_adsbrx.cpp
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@ -54,7 +54,7 @@ void ADSBRXProcessor::execute(const buffer_c8_t& buffer) {
// 1 bit lasts 2 samples // 1 bit lasts 2 samples
if (sample_count & 1) { if (sample_count & 1) {
if (bit_count >= 112) if (bit_count >= msgLen)
{ {
const ADSBFrameMessage message(frame); const ADSBFrameMessage message(frame);
shared_memory.application_queue.push(message); shared_memory.application_queue.push(message);
@ -80,6 +80,10 @@ void ADSBRXProcessor::execute(const buffer_c8_t& buffer) {
if (!(bit_count & 7)) { if (!(bit_count & 7)) {
// Got one byte // Got one byte
frame.push_byte(byte); frame.push_byte(byte);
// Check at the end of the first byte of the message
if ( (bit_count == 8) && !(byte & (0x10<<3)) ) {
msgLen = 56; // DFs 16 or greater are long 112. DFs 15 or less are short 56.
}
} }
} // Second sample of each bit } // Second sample of each bit
sample_count++; sample_count++;
@ -126,6 +130,7 @@ void ADSBRXProcessor::execute(const buffer_c8_t& buffer) {
{ {
//if (c == ADSB_PREAMBLE_LENGTH) { //if (c == ADSB_PREAMBLE_LENGTH) {
decoding = true; decoding = true;
msgLen = 112;
sample_count = 0; sample_count = 0;
bit_count = 0; bit_count = 0;
frame.clear(); frame.clear();

1
firmware/baseband/proc_adsbrx.hpp
View File

@ -53,6 +53,7 @@ private:
float threshold { }, threshold_low { }, threshold_high { }; float threshold { }, threshold_low { }, threshold_high { };
//size_t null_count{ 0 }; //size_t null_count{ 0 };
size_t bit_count { 0 }, sample_count { 0 }; size_t bit_count { 0 }, sample_count { 0 };
size_t msgLen{ 112 };
//std::pair<float, uint8_t> shifter[ADSB_PREAMBLE_LENGTH]; //std::pair<float, uint8_t> shifter[ADSB_PREAMBLE_LENGTH];
float shifter[ADSB_PREAMBLE_LENGTH]; float shifter[ADSB_PREAMBLE_LENGTH];
bool decoding { }; bool decoding { };