[FL-1058] Low frequency RFID app [Indala 40134 Encoder] (#447)

* App Lfrfid: Rename encoder to match extact protocol.
* Api-hal-gpio: fix alt fn config
* Api-hal-gpio: fixed fix
* App Lfrfid: indala 40134 timer stage

applications/lf-rfid/helpers/encoder-indala-40134.cpp

@@ -0,0 +1,34 @@
+#include "encoder-indala-40134.h"
+#include <furi.h>
+
+void EncoderIndala_40134::init(const uint8_t* data, const uint8_t data_size) {
+    card_data = 0b1010000000000000000000000000000011010000010010001000011000110010;
+
+    last_bit = card_data & 1;
+    card_data_index = 0;
+    current_polarity = true;
+}
+
+void EncoderIndala_40134::get_next(bool* polarity, uint16_t* period, uint16_t* pulse) {
+    *period = 2;
+    *pulse = 1;
+    *polarity = current_polarity;
+
+    bit_clock_index++;
+    if(bit_clock_index >= clock_per_bit) {
+        bit_clock_index = 0;
+
+        bool current_bit = (card_data >> (63 - card_data_index)) & 1;
+
+        if(current_bit != last_bit) {
+            current_polarity = !current_polarity;
+        }
+
+        last_bit = current_bit;
+
+        card_data_index++;
+        if(card_data_index >= 64) {
+            card_data_index = 0;
+        }
+    }
+}