Update README.md

QSPI/N25Qxxx/EXT_MEM_BOOT/README.md

@@ -3,18 +3,26 @@
 
 ## Following are the steps after creating a new project
 
-1. Open the `system_stm32xxxx.c` file, goto System_Init, and add the following code to it.
+1. If you are here, means you have already enabled the MEMORY MAPPED MODE. 
+2. Now you have to create a new project, which will boot from the external Flash.
+3. Open the `system_stm32xxxx.c` file, goto System_Init, and add the following code to it.
 
    `RCC->CFGR = 0;   // Reset the configuration register`
 
    `SCB->VTOR = QSPI_BASE;   // 0x90000000`
 
-2. Open the `Flash.ld` script file, and change the FLASH address to the QSPI FLASH. Also change the size 
+4. Open the `Flash.ld` script file, and change the FLASH address to the QSPI FLASH. Also change the size 
 
    `FLASH    (rx)    : ORIGIN = 0x90000000,   LENGTH = 16M`
 
-3. In the Debug configuration, goto debugger tab, and towards the bottom check the `external loader`. 
+5. In the Debug configuration, goto debugger tab, and towards the bottom check the `external loader`. 
 
    Click scan, select the board, and click apply
 
-4. The Application will run from the External memory now.   
+6. The Application will run from the External memory now.   
+
+
+## Check out the Respective files if you don't understand the steps. Also check the .ioc file for the MPU Configuration
+
+
+## Check out the video https://youtu.be/gAyuF20ok8c