Fix few typos in the docs

Signed-off-by: Hrishikesh Dhayagude <hrishi@espressif.com>

docs/README.md

@@ -1,6 +1,6 @@
 # Documentation Source Folder
 
-This folder contains source files of **ESP-IDF documentation** avialable in [English](https://esp-idf.readthedocs.io/en/latest/) and [中文](https://esp-idf.readthedocs.io/zh_CN/latest/).
+This folder contains source files of **ESP-IDF documentation** available in [English](https://esp-idf.readthedocs.io/en/latest/) and [中文](https://esp-idf.readthedocs.io/zh_CN/latest/).
 
 The sources do not render well in GitHub and some information is not visible at all.
 

docs/en/get-started/establish-serial-connection.rst

@@ -69,7 +69,7 @@ Make sure you re-login to enable read and write permissions for the serial port.
 Verify serial connection
 ------------------------
 
-Now verify that the serial connection is operational. You can do this using a serial terminal program. In this example we will use `PuTTY SSH Client <http://www.putty.org/>`_ that is avilable for both Windows and Linux. You can use other serial program and set communication parameters like below.
+Now verify that the serial connection is operational. You can do this using a serial terminal program. In this example we will use `PuTTY SSH Client <http://www.putty.org/>`_ that is available for both Windows and Linux. You can use other serial program and set communication parameters like below.
 
 Run terminal, set identified serial port, baud rate = 115200, data bits = 8, stop bits = 1, and parity = N. Below are example screen shots of setting the port and such transmission parameters (in short described as  115200-8-1-N) on Windows and Linux. Remember to select exactly the same serial port you have identified in steps above.
 

docs/en/get-started/index.rst

@@ -2,7 +2,7 @@
 Get Started
 ***********
 
-This document is intended to help users set up the software environment for developement of applications using hardware based on the Espressif ESP32. Through a simple example we would like to illustrate how to use ESP-IDF (Espressif IoT Development Framework), including the menu based configuration, compiling the ESP-IDF and firmware download to ESP32 boards. 
+This document is intended to help users set up the software environment for development of applications using hardware based on the Espressif ESP32. Through a simple example we would like to illustrate how to use ESP-IDF (Espressif IoT Development Framework), including the menu based configuration, compiling the ESP-IDF and firmware download to ESP32 boards. 
 
 
 Introduction

docs/en/resources.rst

@@ -6,7 +6,7 @@ Resources
 
 * Check the `Issues <https://github.com/espressif/esp-idf/issues>`_  section on GitHub if you find a bug or have a feature request. Please check existing `Issues <https://github.com/espressif/esp-idf/issues>`_ before opening a new one.
 
-* A comprehensive collection of `solutions <https://github.com/espressif/esp-iot-solution#solutions>`_, `practical applications <https://github.com/espressif/esp-iot-solution#esp32-iot-example-list>`_, `components and drivers <https://github.com/espressif/esp-iot-solution#components>`_ based on ESP-IDF is avialable in `ESP32 IoT Solution <https://github.com/espressif/esp-iot-solution>`_ repository. In most of cases descriptions are provided both in English and in 中文. 
+* A comprehensive collection of `solutions <https://github.com/espressif/esp-iot-solution#solutions>`_, `practical applications <https://github.com/espressif/esp-iot-solution#esp32-iot-example-list>`_, `components and drivers <https://github.com/espressif/esp-iot-solution#components>`_ based on ESP-IDF is available in `ESP32 IoT Solution <https://github.com/espressif/esp-iot-solution>`_ repository. In most of cases descriptions are provided both in English and in 中文.
 
 * To develop applications using Arduino platform, refer to `Arduino core for ESP32 WiFi chip <https://github.com/espressif/arduino-esp32#arduino-core-for-esp32-wifi-chip>`_.
 

docs/en/security/flash-encryption.rst

@@ -32,7 +32,7 @@ Background
 
 - Although software running on the chip can transparently decrypt flash contents, by default it is made impossible for the UART bootloader to decrypt (or encrypt) data when flash encryption is enabled.
 
-- If flash encrption may be enabled, the programmer must take certain precautions when writing code that :ref:`uses encrypted flash <using-encrypted-flash>`.
+- If flash encryption may be enabled, the programmer must take certain precautions when writing code that :ref:`uses encrypted flash <using-encrypted-flash>`.
 
 .. _flash-encryption-initialisation:
 

docs/en/security/secure-boot.rst

@@ -14,7 +14,7 @@ Background
 
 - Most data is stored in flash. Flash access does not need to be protected from physical access in order for secure boot to function, because critical data is stored (non-software-accessible) in Efuses internal to the chip.
 
-- Efuses are used to store the secure bootloader key (in efuse BLOCK2), and also a single Efuse bit (ABS_DONE_0) is burned (written to 1) to permanently enable secure boot on the chip.  For more details about efuse, see Chapter 11 "eFuse Controller" in the Technical Referecnce Manual.
+- Efuses are used to store the secure bootloader key (in efuse BLOCK2), and also a single Efuse bit (ABS_DONE_0) is burned (written to 1) to permanently enable secure boot on the chip.  For more details about efuse, see Chapter 11 "eFuse Controller" in the Technical Reference Manual.
 
 - To understand the secure boot process, first familiarise yourself with the standard :doc:`ESP-IDF boot process <../api-guides/general-notes>`.
 
@@ -51,7 +51,7 @@ The following keys are used by the secure boot process:
 
 - "secure boot signing key" is a standard ECDSA public/private key pair (see :ref:`secure-boot-image-signing-algorithm`) in PEM format.
 
-  - The public key from this key pair (for signature verificaton but not signature creation) is compiled into the software bootloader and used to verify the second stage of booting (partition table, app image) before booting continues. The public key can be freely distributed, it does not need to be kept secret.
+  - The public key from this key pair (for signature verification but not signature creation) is compiled into the software bootloader and used to verify the second stage of booting (partition table, app image) before booting continues. The public key can be freely distributed, it does not need to be kept secret.
 
   - The private key from this key pair *must be securely kept private*, as anyone who has this key can authenticate to any bootloader that is configured with secure boot and the matching public key.
 
@@ -82,7 +82,7 @@ How To Enable Secure Boot
 
    *NOTE*: ``make flash`` doesn't flash the bootloader if secure boot is enabled.
 
-8. Reset the ESP32 and it will boot the software bootloader you flashed. The software bootloader will enable secure boot on the chip, and then it verifies the app image signature and boots the app. You should watch the serial console output from the ESP32 to verify that secure boot is enabled and no errors have occured due to the build configuration.
+8. Reset the ESP32 and it will boot the software bootloader you flashed. The software bootloader will enable secure boot on the chip, and then it verifies the app image signature and boots the app. You should watch the serial console output from the ESP32 to verify that secure boot is enabled and no errors have occurred due to the build configuration.
 
 **NOTE** Secure boot won't be enabled until after a valid partition table and app image have been flashed. This is to prevent accidents before the system is fully configured.