Subghz decoder (#1646)

* Initial commit - wip

* Half part of the transition of baseband processor.

* More SGD

* WIP, Weather refactor, UI improv

* Rename

* Added 4msps, and fixes

* Fixes

* princeton working

* Renamed proc_weather, bc now multifunctional

* Proto: bett

* FPS_CAME = 4,
    FPS_PRASTEL = 5,
    FPS_AIRFORCE = 6,

* Came Atomo, fixes

* Separate weather and sgd, bc of baseband size limit

* Fix display

* Save space

* More protos

* Dooya proto added

* More protos

* add protos

* More protos

* Move weather to ext app

* nw

* Revert "Move weather to ext app"

This reverts commit 8a84aac2f5.

* revert

* Fix merge

* Better naming

* More protos

* More protos

* Add protos

* Fix warning

* Add NeroRadio

* more protos

* more protos

* More protos

* Shrink a bit

* fixes

* More protos

* Nicer code

* Fix naming

* Fix format

* Remove unused

* Fix some protos, that needs a LOOOONG part with the same lo/high

* Modify key calculation

firmware/baseband/fprotos/s-honeywell.hpp

@@ -0,0 +1,108 @@
+
+#ifndef __FPROTO_HONEYWELL_H__
+#define __FPROTO_HONEYWELL_H__
+
+#include "subghzdbase.hpp"
+
+class FProtoSubGhzDHoneywell : public FProtoSubGhzDBase {
+   public:
+    FProtoSubGhzDHoneywell() {
+        sensorType = FPS_HONEYWELL;
+        te_short = 280;
+        te_long = 143;
+        te_delta = 51;
+        min_count_bit_for_found = 62;
+    }
+
+    void feed(bool level, uint32_t duration) {
+        ManchesterEvent event = ManchesterEventReset;
+        if (!level) {
+            if (DURATION_DIFF(duration, te_short) < te_delta) {
+                event = ManchesterEventShortLow;
+            } else if (
+                DURATION_DIFF(duration, te_long) < te_delta * 2) {
+                event = ManchesterEventLongLow;
+            }
+        } else {
+            if (DURATION_DIFF(duration, te_short) < te_delta) {
+                event = ManchesterEventShortHigh;
+            } else if (
+                DURATION_DIFF(duration, te_long) < te_delta * 2) {
+                event = ManchesterEventLongHigh;
+            }
+        }
+        if (event != ManchesterEventReset) {
+            bool bit;
+            bool data_ok = FProtoGeneral::manchester_advance(
+                manchester_saved_state, event, &manchester_saved_state, &bit);
+            if (data_ok) {
+                subghz_protocol_decoder_honeywell_addbit(bit);
+            }
+        } else {
+            decode_data = 0;
+            decode_count_bit = 0;
+        }
+    }
+
+   protected:
+    ManchesterState manchester_saved_state = ManchesterStateMid1;
+
+    void subghz_protocol_decoder_honeywell_addbit(bool bit) {
+        decode_data = (decode_data << 1) | bit;
+        decode_count_bit++;
+
+        uint16_t preamble = (decode_data >> 48) & 0xFFFF;
+        // can be multiple, since flipper can't read it well..
+        if (preamble == 0b0011111111111110 || preamble == 0b0111111111111110 ||
+            preamble == 0b1111111111111110) {
+            uint8_t datatocrc[4];
+            datatocrc[0] = (decode_data >> 40) & 0xFFFF;
+            datatocrc[1] = (decode_data >> 32) & 0xFFFF;
+            datatocrc[2] = (decode_data >> 24) & 0xFFFF;
+            datatocrc[3] = (decode_data >> 16) & 0xFFFF;
+            uint8_t channel = (decode_data >> 44) & 0xF;
+            uint16_t crc_calc = 0;
+            if (channel == 0x2 || channel == 0x4 || channel == 0xA) {
+                // 2GIG brand
+                crc_calc = subghz_protocol_honeywell_crc16(datatocrc, 4, 0x8050, 0);
+            } else {  // channel == 0x8
+                crc_calc = subghz_protocol_honeywell_crc16(datatocrc, 4, 0x8005, 0);
+            }
+            uint16_t crc = decode_data & 0xFFFF;
+            if (crc == crc_calc) {
+                // the data is good. process it.
+                data = decode_data;
+                data_count_bit = decode_count_bit;  // maybe set it to 64, and hack the first 2 bits to 1! will see if replay needs it
+                serial = (decode_data >> 24) & 0xFFFFF;
+                btn = (decode_data >> 16) & 0xFF;  // not exactly button, but can contain btn data too.
+                if (callback) callback(this);
+                decode_data = 0;
+                decode_count_bit = 0;
+            } else {
+                return;
+            }
+        }
+    }
+    uint16_t subghz_protocol_honeywell_crc16(
+        uint8_t const message[],
+        unsigned nBytes,
+        uint16_t polynomial,
+        uint16_t init) {
+        uint16_t remainder = init;
+        unsigned byte, bit;
+
+        for (byte = 0; byte < nBytes; ++byte) {
+            remainder ^= message[byte] << 8;
+            for (bit = 0; bit < 8; ++bit) {
+                if (remainder & 0x8000) {
+                    remainder = (remainder << 1) ^ polynomial;
+                } else {
+                    remainder = (remainder << 1);
+                }
+            }
+        }
+        return remainder;
+    }
+};
+
+#endif