Merge pull request #508 from arduino/martab1994-patch-4

Update content.md

Author: martab1994

content/hardware/04.pro/boards/portenta-h7/tutorials/updating-the-bootloader/content.md

@@ -17,7 +17,7 @@ software:
 ---
 
 ## Overview
-This tutorial will explain what a bootloader is, why you should consider keeping it updated and how you can update it. The Portenta H7 also features a second ST ROM bootloader which is a separate mechanism that we don't cover in this tutorial. For the remainder of this tutorial, when we reference a bootloader, the custom bootloader provided by Arduino is meant.
+This tutorial will explain what a bootloader is, why you should consider keeping it updated and how you can update it. The Portenta H7 also features a second ST ROM bootloader which is a separate mechanism that we do not cover in this tutorial. For the remainder of this tutorial, when we reference a bootloader, the custom bootloader provided by Arduino is meant.
 
 ## Goals
 
@@ -33,31 +33,31 @@ This tutorial will explain what a bootloader is, why you should consider keeping
 
 ## What Is a Firmware?
 
-In order to understand how a bootloader works we first need to understand what a firmware is in the world of Arduino. A firmware consists of your sketch (.ino file) plus a couple of files and libraries that give you access to the hardware functions. Those files and libraries together make a bundle that is called a **core**. If you ever wondered what exactly `digitalWrite(pin, HIGH)` does under the hood, the core is the place where you need to look. That also explains why the different hardware architectures on the different Arduino boards need a separate core. Because the hardware level implementation of a function like `digitalWrite` is hardware specific.
+In order to understand how a bootloader works, you first need to understand what a firmware is in the world of Arduino. A firmware consists of your sketch (.ino file) plus a couple of files and libraries that give you access to the hardware functions. Those files and libraries together make a bundle that is called a **core**. If you ever wondered what exactly `digitalWrite(pin, HIGH)` does under the hood, the core is the place where you need to look. That also explains why the different hardware architectures on the different Arduino boards need a separate core, because the hardware level implementation of a function like `digitalWrite` is hardware specific.
 
 ![The firmware consists of your sketch plus the core for the chosen micro controller board](assets/por_ard_bl_firmware.svg)
 
 ## What Is a Bootloader?
 
 A bootloader is a small application that gets started when an Arduino board gets powered. When you order an official Arduino board it comes pre-flashed with a bootloader.
 
-The bootloader helps to upload a new sketch to the board. If the bootloader wasn't there you would need an external programmer device to upload your sketch to the board. The bootloader determines whether it should upload a new firmware or if it should launch an existing one that was uploaded previously. If you don't take any action the bootloader launches an existing firmware. On the other hand, when you double press the reset button on the board the bootloader recognizes that and waits for a firmware to be uploaded. The bootloader then takes care of storing the new firmware in the memory.
+The bootloader helps to upload a new sketch to the board. If the bootloader was not there, you would need an external programmer device to upload your sketch to the board. The bootloader determines whether it should upload a new firmware or if it should launch an existing one that was uploaded previously. If you do not take any action, the bootloader launches an existing firmware. On the other hand, when you double press the reset button on the board, the bootloader recognizes that and waits for a firmware to be uploaded. The bootloader then takes care of storing the new firmware in the memory.
 
 ![This chart shows a simplified version of the steps the Portenta goes through when it boots](assets/por_ard_bl_booting_process.svg)
 
 ## Memory Layout
 
-Both the bootloader and the firmware have predefined (but adjustable) locations in the memory where they get stored. In the end, the processor needs to know where to find the instructions to do its work. On the Portenta for example the bootloader is stored at the Flash memory address `0x08000000`. When the board gets powered on it will jump to this location and start to do its job. The bootloader in turn knows that e.g. for the M7 the firmware can be found at location `0x08040000` so it will jump there if it doesn't need to upload a new firmware.
+Both the bootloader and the firmware have predefined (but adjustable) locations in the memory where they get stored. In the end, the processor needs to know where to find the instructions to do its work. On the Portenta, for example, the bootloader is stored at the Flash memory address `0x08000000`. When the board gets powered on, it will jump to this location and start to do its job. The bootloader in turn knows that e.g. for the M7 the firmware can be found at location `0x08040000`, so it will jump there if it does not need to upload a new firmware.
 
 ![There are predefined, but adjustable locations in the memory where the firmware and the bootloader get installed](assets/por_ard_bl_flash_memory.svg)
 
 
 ## Instructions
 
 ### Flashing the Latest Bootloader
-Even though the Arduino boards come pre-flashed with a bootloader there are sometimes improvements or bug fixes which get integrated into an updated bootloader version. They usually improve stability and performance. To benefit from that it makes sense to update it when there is a new version.
+Even though the Arduino boards come pre-flashed with a bootloader, there are sometimes improvements or bug fixes which get integrated into an updated bootloader version. They usually improve stability and performance. To benefit from that, it makes sense to update it when there is a new version.
 
-The bootloader is stored in a location that doesn't get overwritten by a firmware being uploaded to the Portenta. If you upload for example the OpenMV firmware and then later decide to switch back to a regular Arduino firmware the bootloader won't be affected.
+The bootloader is stored in a location that does not get overwritten by a firmware being uploaded to the Portenta. If you upload for example the OpenMV firmware and then later decide to switch back to a regular Arduino firmware, the bootloader will not be affected.
 
 ### 1. Updating the Core
 New versions of the bootloader normally get shipped together with the core. That means you first have to update the core before you can update the bootloader. To do so open the board manager in the menu under **Tools >Board >Boards Manager...**
@@ -69,15 +69,15 @@ In the board manager and search for "portenta".  Find the Arduino mbed-enabled B
 ![A search for "portenta" reveals the core that needs to be updated to get the latest bootloader](assets/por_ard_bl_update_core.png)
 
 ### 2. Updating the Bootloader
-To update the bootloader you can use the **STM32H747_updateBootloader** sketch. You can find the sketch file under **File > Examples > STM32H747_System**
+To update the bootloader, you can use the **STM32H747_updateBootloader** sketch. You can find the sketch file under **File > Examples > STM32H747_System**
 
 ![Finding the bootloader updater sketch](assets/por_ard_bl_find_sketch_file.png)
 
 Compile and upload the sketch to the board. Make sure you have selected the right port before you upload.
 
 ![The bootloader updater sketch](assets/por_ard_bl_updater_sketch.png)
 
-Open the Serial monitor and you will see the specifications of your current bootloader and your board. Enter **Y** in the text field and press enter to begin the update process.
+Open the Serial Monitor and you will see the specifications of your current bootloader and your board. Enter **Y** in the text field and press enter to begin the update process.
 
 ![Serial monitor with specifications](assets/por_ard_bl_update_available.png)
 
@@ -88,7 +88,7 @@ You will see the message "Bootloader update complete. You may now disconnect the
 **Expert tip:** Newer versions of the bootloader allow to fetch the version number via dfu-util. To see it, put the Portenta board into bootloader mode and invoke the dfu-util command: `dfu-util -l | grep "Bootloader"`. The dfu-util command can be found in the Arduino15/packages/arduino/tools/dfu-util directory.
 
 ## Conclusion
-Having an updated bootloader is important to benefit from improved performance and resolved bugs. As mentioned earlier we recommend to keep an eye out for new releases on our [Github repository](https://github.com/arduino/ArduinoCore-mbed/tree/master/bootloaders) and update the bootloader whenever there is a new release available.
+Having an updated bootloader is important to benefit from improved performance and resolved bugs. As mentioned earlier, we recommend to keep an eye out for new releases on our [Github repository](https://github.com/arduino/ArduinoCore-mbed/tree/master/bootloaders) and update the bootloader whenever there is a new release available.
 
 ## Troubleshooting
 ### LIBUSB_ERROR_IO Error