[feat](trx-rs): add ft8 decoder

Co-authored-by: Codex <codex@openai.com> Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>
2026-02-09 21:19:56 +01:00
parent 7bd1a70607
commit 1199ab85e9
206 changed files with 9613 additions and 5 deletions
@@ -0,0 +1,31 @@
+#ifndef _INCLUDE_CRC_H_
+#define _INCLUDE_CRC_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+// Compute 14-bit CRC for a sequence of given number of bits using FT8/FT4 CRC polynomial
+// [IN] message  - byte sequence (MSB first)
+// [IN] num_bits - number of bits in the sequence
+uint16_t ftx_compute_crc(const uint8_t message[], int num_bits);
+
+/// Extract the FT8/FT4 CRC of a packed message (during decoding)
+/// @param[in] a91 77 bits of payload data + CRC
+/// @return Extracted CRC
+uint16_t ftx_extract_crc(const uint8_t a91[]);
+
+/// Add FT8/FT4 CRC to a packed message (during encoding)
+/// @param[in] payload 77 bits of payload data
+/// @param[out] a91 91 bits of payload data + CRC
+void ftx_add_crc(const uint8_t payload[], uint8_t a91[]);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _INCLUDE_CRC_H_