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Bugfix: Strip last parity bit from decoded FDX-B data (#3199)

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* remove last parity bit from buffer
* add unit tests
* zap old debug logging

---------

Co-authored-by: Sergei Gavrilov <who.just.the.doctor@gmail.com>
This commit is contained in:
John Scarfone
2024-01-16 03:31:50 -05:00
committed by MX
parent 11ecb54576
commit f37d00a8ba
2 changed files with 91 additions and 2 deletions
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4
lib/lfrfid/protocols/protocol_fdx_b.c
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@@ -101,7 +101,7 @@ static bool protocol_fdx_b_can_be_decoded(ProtocolFDXB* protocol) {
void protocol_fdx_b_decode(ProtocolFDXB* protocol) {
// remove parity
bit_lib_remove_bit_every_nth(protocol->encoded_data, 3, 13 * 9, 9);
bit_lib_remove_bit_every_nth(protocol->encoded_data, 3, 14 * 9, 9);
// remove header pattern
for(size_t i = 0; i < 11; i++)
@@ -119,7 +119,7 @@ void protocol_fdx_b_decode(ProtocolFDXB* protocol) {
// 72 xxxxxxxx
// 80 eeeeeeee 24 bits of extra data if present.
// 88 eeeeeeee eg. $123456.
// 92 eeeeeeee
// 96 eeeeeeee
// copy data without checksum
bit_lib_copy_bits(protocol->data, 0, 64, protocol->encoded_data, 0);