New LF-RFID app (#534)

* Hal lfrfid: add read timer pulse and period config fns * New debug application for lfrfid subsystem * New lfrfid: app, fix naming * App lfrfid: assets * Container view module * App ibutton: remove unused header * App lfrfid scenes * App notification, add yield to blocking operations, add speaker volume control * App lfrfid: reading key scene * Assets: placeholder icon * App lfrfid: reworked container view module * App lfrfid: new scenes * App lfrfid: write scene * App lfrfid: write hid * App lfrfid: emulate scene * App lfrfid: save name scene * App lfrfid: add missing file
2021-06-29 00:42:30 +10:00
parent 5d746234e9
commit 22e1ecb642
141 changed files with 2504 additions and 1666 deletions
--- a/applications/lfrfid/helpers/decoder-emmarine.cpp
+++ b/applications/lfrfid/helpers/decoder-emmarine.cpp
@@ -0,0 +1,72 @@
+#include "emmarine.h"
+#include "decoder-emmarine.h"
+#include <furi.h>
+#include <api-hal.h>
+
+constexpr uint32_t clocks_in_us = 64;
+constexpr uint32_t short_time = 255 * clocks_in_us;
+constexpr uint32_t long_time = 510 * clocks_in_us;
+constexpr uint32_t jitter_time = 100 * clocks_in_us;
+
+constexpr uint32_t short_time_low = short_time - jitter_time;
+constexpr uint32_t short_time_high = short_time + jitter_time;
+constexpr uint32_t long_time_low = long_time - jitter_time;
+constexpr uint32_t long_time_high = long_time + jitter_time;
+
+void DecoderEMMarine::reset_state() {
+    ready = false;
+    readed_data = 0;
+    manchester_advance(
+        manchester_saved_state, ManchesterEventReset, &manchester_saved_state, nullptr);
+}
+
+bool DecoderEMMarine::read(uint8_t* data, uint8_t data_size) {
+    bool result = false;
+
+    if(ready) {
+        result = true;
+        em_marine.decode(
+            reinterpret_cast<const uint8_t*>(&readed_data), sizeof(uint64_t), data, data_size);
+        ready = false;
+    }
+
+    return result;
+}
+
+void DecoderEMMarine::process_front(bool polarity, uint32_t time) {
+    if(ready) return;
+    if(time < short_time_low) return;
+
+    ManchesterEvent event = ManchesterEventReset;
+
+    if(time > short_time_low && time < short_time_high) {
+        if(polarity) {
+            event = ManchesterEventShortHigh;
+        } else {
+            event = ManchesterEventShortLow;
+        }
+    } else if(time > long_time_low && time < long_time_high) {
+        if(polarity) {
+            event = ManchesterEventLongHigh;
+        } else {
+            event = ManchesterEventLongLow;
+        }
+    }
+
+    if(event != ManchesterEventReset) {
+        bool data;
+        bool data_ok =
+            manchester_advance(manchester_saved_state, event, &manchester_saved_state, &data);
+
+        if(data_ok) {
+            readed_data = (readed_data << 1) | data;
+
+            ready = em_marine.can_be_decoded(
+                reinterpret_cast<const uint8_t*>(&readed_data), sizeof(uint64_t));
+        }
+    }
+}
+
+DecoderEMMarine::DecoderEMMarine() {
+    reset_state();
+}