Add item 34 to debug menu to display the partition table

Verify that the spiffs exists during boot and halt boot when it is
missing.

Author: LeeLeahy2

Firmware/RTK_Surveyor/RTK_Surveyor.ino

@@ -896,6 +896,13 @@ void setup()
     DMW_c("beginDisplay");
     beginDisplay(); // Start display to be able to display any errors
 
+    DMW_c("findSpiffsPartition");
+    if (!findSpiffsPartition())
+    {
+        printPartitionTable(); // Print the partition tables
+        reportFatalError("spiffs partition not found!");
+    }
+
     DMW_c("beginFS");
     beginFS(); // Start LittleFS file system for settings
 

Firmware/RTK_Surveyor/menuSystem.ino

@@ -647,6 +647,8 @@ void menuDebugSoftware()
             systemPrintf("%d (%d days %d:%02d:%02d)\r\n", settings.rebootSeconds, days, hours, minutes, seconds);
         }
 
+        systemPrintf("34) Print partition table\r\n");
+
         // Tasks
         systemPrint("50) Task Highwater Reporting: ");
         if (settings.enableTaskReports == true)
@@ -716,6 +718,8 @@ void menuDebugSoftware()
                 }
             }
         }
+        else if (incoming == 34)
+            printPartitionTable();
         else if (incoming == 50)
             settings.enableTaskReports ^= 1;
         else if (incoming == 60)

Firmware/RTK_Surveyor/support.ino

@@ -799,6 +799,41 @@ void printUbloxInvalidData(PARSE_STATE *parse)
     systemPrintf("    %s Invalid UBX data, %d bytes\r\n", parse->parserName, parse->length - 1);
 }
 
+void printPartitionTable(void)
+{
+    systemPrintln("ESP32 Partition table:\n");
+
+    systemPrintln("| Type | Sub |  Offset  |   Size   |       Label      |");
+    systemPrintln("| ---- | --- | -------- | -------- | ---------------- |");
+
+    esp_partition_iterator_t pi = esp_partition_find(ESP_PARTITION_TYPE_ANY, ESP_PARTITION_SUBTYPE_ANY, NULL);
+    if (pi != NULL)
+    {
+        do
+        {
+            const esp_partition_t *p = esp_partition_get(pi);
+            systemPrintf("|  %02x  | %02x  | 0x%06X | 0x%06X | %-16s |\r\n", p->type, p->subtype, p->address, p->size,
+                         p->label);
+        } while ((pi = (esp_partition_next(pi))));
+    }
+}
+
+// Locate the partition for the little file system
+bool findSpiffsPartition(void)
+{
+    esp_partition_iterator_t pi = esp_partition_find(ESP_PARTITION_TYPE_ANY, ESP_PARTITION_SUBTYPE_ANY, NULL);
+    if (pi != NULL)
+    {
+        do
+        {
+            const esp_partition_t *p = esp_partition_get(pi);
+            if (strcmp(p->label, "spiffs") == 0)
+                return true;
+        } while ((pi = (esp_partition_next(pi))));
+    }
+    return false;
+}
+
 // Verify table sizes match enum definitions
 void verifyTables()
 {