Update flash.py with additional option for ESP activation

flash.py

@@ -6,14 +6,15 @@
 
 
 def help() -> None:
-    print(f'{sys.argv[0]} [nano | xavier | orin] [nand | v05]')
+    print(f'{sys.argv[0]} [nano | xavier | orin] [nand | v05] [usb | /dev/<name>] [enable]')
     print(f'   nano          flashing Jetson Nano (default)')
     print(f'   xavier        flashing Jetson Xavier')
     print(f'   orin          flashing Jetson Orin')
     print(f'   nand          Robot Brain has piggyboard with NAND gate (eg. older version)')
     print(f'   v05           Robot Brain has piggyboard with V0.5 or higher (eg. newer version)')
     print(f'   usb           use /dev/tty.SLAB_USBtoUART as serial device')
     print(f'   /dev/<name>   use /dev/<name> as serial device')
+    print(f'   enable        enable the ESP32 microcontroller')
 
 
 if any(h in sys.argv for h in ['--help', '-help', 'help']):
@@ -28,6 +29,12 @@ def help() -> None:
         device = p
 esp = Esp(nand='nand' in sys.argv, xavier='xavier' in sys.argv, orin='orin' in sys.argv, v05='v05' in sys.argv, device=device)
 
+if 'enable' in sys.argv:
+    with esp.pin_config():
+        print('Enabling ESP...')
+        esp.activate()
+    sys.exit()
+
 with esp.pin_config(), esp.flash_mode():
     print('Flashing...')
     result = subprocess.run([