RFID: Fix various EM-Marin typos (#635)

applications/lfrfid/helpers/encoder-emmarin.cpp

@@ -0,0 +1,24 @@
+#include "encoder-emmarin.h"
+#include "protocols/protocol-emmarin.h"
+#include <furi.h>
+
+void EncoderEM::init(const uint8_t* data, const uint8_t data_size) {
+    ProtocolEMMarin em_marin;
+    em_marin.encode(data, data_size, reinterpret_cast<uint8_t*>(&card_data), sizeof(uint64_t));
+
+    card_data_index = 0;
+}
+
+// data transmitted as manchester encoding
+// 0 - high2low
+// 1 - low2high
+void EncoderEM::get_next(bool* polarity, uint16_t* period, uint16_t* pulse) {
+    *period = clocks_per_bit;
+    *pulse = clocks_per_bit / 2;
+    *polarity = (card_data >> (63 - card_data_index)) & 1;
+
+    card_data_index++;
+    if(card_data_index >= 64) {
+        card_data_index = 0;
+    }
+}