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Improved decode of type 17 at expense of others

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Reject all non type 17 packets
This commit is contained in:
heurist1 2021-10-31 13:23:48 +00:00
parent 0d7bbac6a1
commit 0d51e3569f
1 changed files with 13 additions and 2 deletions
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15
firmware/baseband/proc_adsbrx.cpp
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@ -77,14 +77,25 @@ void ADSBRXProcessor::execute(const buffer_c8_t& buffer) {
byte = bit | (byte << 1);
bit_count++;
// Only DF 17 are used so reset if anything else if found
if (!(bit_count & 7)) {
// Got one byte
// Store the 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.
}
}
// If not DF type 17
if ( (bit_count == 8) && (byte>>3 != 17) ) {
decoding = false;
bit = (prev_mag > mag) ? 1 : 0;
}
} // last bit of a byte
} // Second sample of each bit
sample_count++;
} else {