SubGHz: Rework GPS as plugin, fix VGM (#5)

- Streamlined atomic init and deinit
- Load from plugin into RAM dynamically
- Don't attempt load if VGM / Expansion is connected
- Deduplicated some code, cleaned up some other bits

applications/main/subghz/helpers/subghz_gps.h

@@ -1,25 +1,18 @@
-#include <furi_hal.h>
-#include <momentum/momentum.h>
-#include <expansion/expansion.h>
+#pragma once
 
-#define UART_CH (momentum_settings.uart_nmea_channel)
+#include <furi_hal.h>
+#include <flipper_application/flipper_application.h>
 
 #define RX_BUF_SIZE 1024
 
-typedef enum {
-    WorkerEvtStop = (1 << 0),
-    WorkerEvtRxDone = (1 << 1),
-} WorkerEvtFlags;
+typedef struct SubGhzGPS SubGhzGPS;
 
-#define WORKER_ALL_RX_EVENTS (WorkerEvtStop | WorkerEvtRxDone)
-
-typedef struct {
-    Expansion* expansion;
+struct SubGhzGPS {
+    FlipperApplication* plugin_app;
     FuriThread* thread;
     FuriStreamBuffer* rx_stream;
     uint8_t rx_buf[RX_BUF_SIZE];
     FuriHalSerialHandle* serial_handle;
-
     FuriTimer* timer;
 
     float latitude;
@@ -28,73 +21,40 @@ typedef struct {
     uint8_t fix_second;
     uint8_t fix_minute;
     uint8_t fix_hour;
-} SubGhzGPS;
+
+    /**
+     * Deinitialize SubGhzGPS object
+     * To be used by plugin handler
+     * 
+     * @param subghz_gps SubGhzGPS object
+     * @return void
+    */
+    void (*deinit)(SubGhzGPS* subghz_gps);
+
+    /**
+     * Get description for signal info
+     * 
+     * @param subghz_gps SubGhzGPS object
+     * @param descr Output string
+     * @param latitude Latitude
+     * @param longitude Longitude
+     * @return void
+    */
+    void (*get_descr)(SubGhzGPS* subghz_gps, FuriString* descr, float latitude, float longitude);
+};
 
 /**
- * Initialize SubGhzGPS object
- * 
+ * Initialize SubGhzGPS plugin
+ * Fails and returns NULL if Expansion is connected
+ *
  * @return SubGhzGPS* SubGhzGPS object
 */
-SubGhzGPS* subghz_gps_init();
+SubGhzGPS* subghz_gps_plugin_init();
 
 /**
- * Deinitialize SubGhzGPS object
+ * Deinitialize SubGhzGPS plugin
  * 
  * @param subghz_gps SubGhzGPS object
  * @return void
 */
-void subghz_gps_deinit(SubGhzGPS* subghz_gps);
-
-/**
- * Start GPS thread
- * 
- * @param subghz_gps SubGhzGPS object
- * @return void
-*/
-void subghz_gps_start(SubGhzGPS* subghz_gps);
-
-/**
- * Stop GPS thread
- * 
- * @param subghz_gps SubGhzGPS object
- * @return void
-*/
-void subghz_gps_stop(SubGhzGPS* subghz_gps);
-
-/**
- * Set baudrate for GPS
- * 
- * @param baudrate Baudrate
- * @return void
-*/
-void subghz_gps_set_baudrate(SubGhzGPS* subghz_gps, uint32_t baudrate);
-
-/**
- * Convert degree to radian
- * 
- * @param deg Degree
- * @return double Radian
- */
-double subghz_gps_deg2rad(double deg);
-
-/**
- * Calculate distance between two coordinates
- * 
- * @param lat1d Latitude 1
- * @param lon1d Longitude 1
- * @param lat2d Latitude 2
- * @param lon2d Longitude 2
- * @return double Distance in km
-*/
-double subghz_gps_calc_distance(double lat1d, double lon1d, double lat2d, double lon2d);
-
-/**
- * Calculate angle between two coordinates
- * 
- * @param lat1 Latitude 1
- * @param lon1 Longitude 1
- * @param lat2 Latitude 2
- * @param lon2 Longitude 2
- * @return double Angle in degree
-*/
-double subghz_gps_calc_angle(double lat1, double lon1, double lat2, double lon2);
+void subghz_gps_plugin_deinit(SubGhzGPS* subghz_gps);