bootapp cleanup

Firmware/Marlin_main.cpp

@@ -920,7 +920,7 @@ void update_sec_lang_from_external_flash()
 			}
 		}
 	}
-	boot_app_flags &= ~BOOT_APP_FLG_USER0;
+	boot_app_magic = 0;
 }
 
 
@@ -4092,8 +4092,7 @@ void process_commands()
 		}
 		else if (code_seen_P(PSTR("RESET"))) { // PRUSA RESET
 #if defined(XFLASH) && defined(BOOTAPP)
-            boot_app_magic = BOOT_APP_MAGIC;
-            boot_app_flags = BOOT_APP_FLG_RUN;
+            boot_app_magic = 0;
 #endif //defined(XFLASH) && defined(BOOTAPP)
             softReset();
     }

Firmware/bootapp.c

@@ -24,8 +24,7 @@ void bootapp_ram2flash(uint16_t rptr, uint16_t fptr, uint16_t size)
 {
 	cli();
 	boot_app_magic = BOOT_APP_MAGIC;
-	boot_app_flags |= BOOT_APP_FLG_COPY;
-	boot_app_flags |= BOOT_APP_FLG_ERASE;
+	boot_app_flags |= BOOT_APP_FLG_COPY | BOOT_APP_FLG_ERASE;
 	boot_copy_size = (uint16_t)size;
 	boot_src_addr = (uint32_t)rptr;
 	boot_dst_addr = (uint32_t)fptr;
@@ -38,6 +37,7 @@ void bootapp_reboot_user0(uint8_t reserved)
 	cli();
 	boot_app_magic = BOOT_APP_MAGIC;
 	boot_app_flags = BOOT_APP_FLG_USER0;
+	boot_copy_size = 0;
 	boot_reserved = reserved;
 	// bootapp_print_vars();
 	softReset();

Firmware/bootapp.h

@@ -17,11 +17,10 @@
 #define BOOT_APP_FLG_ERASE 0x01
 #define BOOT_APP_FLG_COPY  0x02
 #define BOOT_APP_FLG_FLASH 0x04
-#define BOOT_APP_FLG_RUN 0x08
 
 #define BOOT_APP_FLG_USER0 0x80
 
-#define BOOT_APP_MAGIC 0x55aa55aa
+#define BOOT_APP_MAGIC 0x55aa55aaUL
 
 
 #if defined(__cplusplus)

Firmware/optiboot_xflash.cpp

@@ -161,6 +161,8 @@ uint8_t optiboot_xflash_enter()
   lcd_clear();
   lcd_puts_at_P(0, 1, PSTR(" Upgrading xflash\n Do not disconnect!"));
 
+  boot_app_magic = 0; //disable the bootapp if a watchdog reset is going to be used
+
   /* Forever loop: exits by causing WDT reset */
   for (;;) {
     /* get character from UART */