Added tetra rx ext app (#3257)

2026-09-11 09:09:29 +00:00 · 2026-07-09 09:10:08 +02:00
parent 42122a739c
commit d671455f79
22 changed files with 1402 additions and 0 deletions
@@ -0,0 +1,33 @@
+#include "tetra_crc.hpp"
+
+namespace ui::external_app::tetra_rx {
+
+uint16_t CRC::crc16_itut_bits(
+    const uint8_t* bits,
+    uint32_t n_bits,
+    uint16_t init) {
+    uint16_t crc = init;
+
+    for (uint32_t i = 0; i < n_bits; i++) {
+        uint8_t bit =
+            (bits[i >> 3] >>
+             (7 - (i & 7))) &
+            1;
+
+        crc ^= uint16_t(bit) << 15;
+
+        if (crc & 0x8000) {
+            crc =
+                (crc << 1) ^
+                0x1021;
+        } else {
+            crc <<= 1;
+        }
+
+        crc &= 0xffff;
+    }
+
+    return crc;
+}
+
+}  // namespace ui::external_app::tetra_rx