Improve output regarding ESP32 PSRAM (#118)

Author: josesimoes

nanoFirmwareFlasher/Esp32DeviceInfo.cs

@@ -128,8 +128,8 @@ public override string ToString()
 
             switch(PSRamAvailable)
             {
-                case PSRamAvailability.Unknown:
-                    deviceInfo.AppendLine($"PSRAM: unknown");
+                case PSRamAvailability.Undetermined:
+                    deviceInfo.AppendLine($"PSRAM: undetermined");
                     break;
 
                 case PSRamAvailability.Yes:

nanoFirmwareFlasher/EspTool.cs

@@ -239,7 +239,7 @@ internal Esp32DeviceInfo GetDeviceDetails(
             _chipType = chipType.ToLower().Replace("-", "");
 
             // try to find out if PSRAM is present
-            PSRamAvailability psramIsAvailable = PSRamAvailability.Unknown;
+            PSRamAvailability psramIsAvailable = PSRamAvailability.Undetermined;
 
             if (name.Contains("PICO"))
             {
@@ -286,7 +286,7 @@ internal Esp32DeviceInfo GetDeviceDetails(
         /// <returns>Information about availability of PSRAM, if that was possible to determine.</returns>
         private PSRamAvailability FindPSRamAvailable()
         {
-            PSRamAvailability pSRamAvailability = PSRamAvailability.Unknown;
+            PSRamAvailability pSRamAvailability = PSRamAvailability.Undetermined;
 
             // don't want to output anything from esptool
             // backup current verbosity setting
@@ -314,7 +314,7 @@ private PSRamAvailability FindPSRamAvailable()
                 {
                     // this board was put on download mode manually, can't run the test app...
 
-                    return PSRamAvailability.Unknown;
+                    return PSRamAvailability.Undetermined;
                 }
 
                 try

nanoFirmwareFlasher/PSRamAvailability.cs

@@ -11,9 +11,9 @@ namespace nanoFramework.Tools.FirmwareFlasher
     internal enum PSRamAvailability
     {
         /// <summary>
-        /// Availability unknown.
+        /// Availability hasn't been determined.
         /// </summary>
-        Unknown = 0,
+        Undetermined = 0,
 
         /// <summary>
         /// PSRAM is available.