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/pulse-joiner.cpp
+++ b/applications/lfrfid/helpers/pulse-joiner.cpp
@@ -0,0 +1,95 @@
+#include "pulse-joiner.h"
+#include <furi.h>
+
+bool PulseJoiner::push_pulse(bool polarity, uint16_t period, uint16_t pulse) {
+    bool result = false;
+    furi_check((pulse_index + 1) < pulse_max);
+
+    if(polarity == false && pulse_index == 0) {
+        // first negative pulse is ommited
+
+    } else {
+        pulses[pulse_index].polarity = polarity;
+        pulses[pulse_index].time = pulse;
+        pulse_index++;
+    }
+
+    if(period > pulse) {
+        pulses[pulse_index].polarity = !polarity;
+        pulses[pulse_index].time = period - pulse;
+        pulse_index++;
+    }
+
+    if(pulse_index >= 4) {
+        // we know that first pulse is always high
+        // so we wait 2 edges, hi2low and next low2hi
+
+        uint8_t edges_count = 0;
+        bool last_polarity = pulses[0].polarity;
+
+        for(uint8_t i = 1; i < pulse_index; i++) {
+            if(pulses[i].polarity != last_polarity) {
+                edges_count++;
+                last_polarity = pulses[i].polarity;
+            }
+        }
+
+        if(edges_count >= 2) {
+            result = true;
+        }
+    }
+
+    return result;
+}
+
+void PulseJoiner::pop_pulse(uint16_t* period, uint16_t* pulse) {
+    furi_check(pulse_index <= (pulse_max + 1));
+
+    uint16_t tmp_period = 0;
+    uint16_t tmp_pulse = 0;
+    uint8_t edges_count = 0;
+    bool last_polarity = pulses[0].polarity;
+    uint8_t next_fist_pulse = 0;
+
+    for(uint8_t i = 0; i < pulse_max; i++) {
+        // count edges
+        if(pulses[i].polarity != last_polarity) {
+            edges_count++;
+            last_polarity = pulses[i].polarity;
+        }
+
+        // wait for 2 edges
+        if(edges_count == 2) {
+            next_fist_pulse = i;
+            break;
+        }
+
+        // sum pulse time
+        if(pulses[i].polarity) {
+            tmp_period += pulses[i].time;
+            tmp_pulse += pulses[i].time;
+        } else {
+            tmp_period += pulses[i].time;
+        }
+        pulse_index--;
+    }
+
+    *period = tmp_period;
+    *pulse = tmp_pulse;
+
+    // remove counted periods and shift data
+    for(uint8_t i = 0; i < pulse_max; i++) {
+        if((next_fist_pulse + i) < pulse_max) {
+            pulses[i].polarity = pulses[next_fist_pulse + i].polarity;
+            pulses[i].time = pulses[next_fist_pulse + i].time;
+        } else {
+            break;
+        }
+    }
+}
+
+PulseJoiner::PulseJoiner() {
+    for(uint8_t i = 0; i < pulse_max; i++) {
+        pulses[i] = {false, 0};
+    }
+}