Restructured AMS data parsing

src/ams/GbtParser.h

@@ -0,0 +1,26 @@
+#ifndef _GBTPARSER_H
+#define _GBTPARSER_H
+
+#include "Arduino.h"
+#include "DataParser.h"
+
+#define GBT_TAG 0xE0
+
+typedef struct GBTHeader {
+	uint8_t flag;
+	uint8_t control;
+	uint16_t sequence;
+	uint16_t sequenceAck;
+    uint8_t size;
+} __attribute__((packed)) GBTHeader;
+
+class GBTParser {
+public:
+    int8_t parse(uint8_t *buf, DataParserContext &ctx);
+private:
+    uint8_t lastSequenceNumber = 0;
+    uint16_t pos = 0;
+    uint8_t *buf  = NULL;
+};
+
+#endif