adding flasher

main/system.h

@@ -4,9 +4,22 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "freertos/semphr.h"
+#include "freertos/queue.h"
+#include "esp_bt_defs.h"
 
 #define DISABLE_GUI
 
+#define MAX_PAIRED_DEVICES 10
+#define DEVICE_NAME_MAX_LEN 32
+
+// Forward declaration of paired_device_t
+typedef struct {
+    char name[DEVICE_NAME_MAX_LEN];
+    esp_bd_addr_t bda;
+    uint32_t last_connected;
+    bool is_connected;
+} paired_device_t;
+
 enum
 {
     ANGLE_XY = 0,
@@ -34,6 +47,10 @@ typedef struct SystemState_s
 
     // BT event data
     int btDeviceIndex;
+    
+    // NVS cached data
+    paired_device_t pairedDevices[MAX_PAIRED_DEVICES];
+    size_t pairedDeviceCount;
 
 } SystemState_t;
 
@@ -88,5 +105,36 @@ int system_getBtDeviceIndex(void);
 void system_requestVolumeUp(void);
 void system_requestVolumeDown(void);
 
+// NVS Service
+typedef enum {
+    NVS_OP_SAVE_DEVICE,
+    NVS_OP_LOAD_DEVICES,
+    NVS_OP_REMOVE_DEVICE,
+    NVS_OP_IS_DEVICE_KNOWN,
+    NVS_OP_GET_DEVICE_COUNT,
+    NVS_OP_UPDATE_TIMESTAMP
+} nvs_operation_type_t;
+
+typedef struct {
+    nvs_operation_type_t operation;
+    paired_device_t device;
+    esp_bd_addr_t bda;
+    TaskHandle_t requestor;
+    esp_err_t result;
+    bool response_ready;
+} nvs_request_t;
+
+void system_initNvsService(void);
+void system_processNvsRequests(void);
+esp_err_t system_savePairedDevice(const paired_device_t *device);
+esp_err_t system_loadPairedDevices(paired_device_t *devices, size_t *count);
+esp_err_t system_removePairedDevice(esp_bd_addr_t bda);
+bool system_isDeviceKnown(esp_bd_addr_t bda);
+esp_err_t system_getKnownDeviceCount(size_t *count);
+esp_err_t system_updateConnectionTimestamp(esp_bd_addr_t bda);
+const paired_device_t* system_getPairedDevices(size_t *count);
+
+
+#define NVS_TIMEOUT_MS 5000
 
 #endif