Freertos Lessons On Esp32 Sdk

Study freeRTOS from examples

What you'll learn
freeRTOS task create, delete, input parameter, priority, suspend and resume
freeRTOS queue delivery data, queue multiple in single out mode, queue set, queue mailbox
freeRTOS software timer
freeRTOS binary semaphore and count semaphore
freeRTOS mutex and recursive mutex
freeRTOS event group wait and event group sync
freeRTOS notify sync and notify value
freeRTOS watch dog
Requirements
Basic c programming knowledge
Description
The first question for the freeRTOS on ESP32 lessons is why we need to study freeRTOS. The most important reasons are probably as follows:(1) First, it is totally free and open source. You no need to pay any fee for using it in your any projects. And you can get all the source code from it's official website;(2) Second, it is a "RTOS". "RTOS" means "real time operating system". It can processes data and events that have critically defined time constraints. (3) Third, it is very tiny and simple. The kernel resource files are only three c files. It is very fit for microcontroller which has limited ram or rom.(4) Forth, it is well supported. It has been porting on lots of platform, even including xilinx FPGA. The second question is why we study freeRTOS based on ESP32?(1) The first reason is the original SDK software of ESP32 is using the freeRTOS as its operation system. We no need to port it again. We will have a very stable platform to study all kinds of software features of the freeRTOS.(2) ESP32 is a very wonderful chip. It has internal flash and sram. It has the wifi and bluetooth function on the same chip. The wifi and bluetooth is a critical function for the "internet things" application. It also has other powerful peripheral interfaces, such as, I2C, SPI, I2S, UART, ADC, DAC, RTC, USB etc.(3) It also has a very small package size and very low price compared with other similar function chips. It is very easy to DIY products by hobbyist.

Overview

Section 1: Introduction

Lecture 1 Introduction

Section 2: Setup

Lecture 2 Setup ESP32 command line compile environment

Lecture 3 ESP32 system startup flow

Section 3: freeRTOS Task

Lecture 4 Task create and delete

Lecture 5 Task input parameter

Lecture 6 Task Priority

Lecture 7 Task suspend and resume

Lecture 8 Task list

Lecture 9 Task stack setting

Lecture 10 task watch dog

Section 4: freeRTOS Queue

Lecture 11 Queue delivery integer data

Lecture 12 Queue space

Lecture 13 Queue SendToFront vs SendToBack

Lecture 14 Queue delivery struct data

Lecture 15 Queue delivery string data

Lecture 16 Queue multiple in single out

Lecture 17 Queue set

Lecture 18 Queue mailbox

Section 5: freeRTOS timer

Lecture 19 Software timer 01

Lecture 20 Software timer 02

Lecture 21 Software timer 03

Section 6: freeRTOS semaphore

Lecture 22 Binary semaphore

Lecture 23 Counting semaphore

Section 7: freeRTOS mutex

Lecture 24 Regular mutex

Lecture 25 Recursive mutex

Section 8: freeRTOS event group

Lecture 26 freeRTOS event group wait

Lecture 27 freeRTOS event group sync

Section 9: freeRTOS notification

Lecture 28 freeRTOS notification sync

Lecture 29 freeRTOS notification value

Section 10: freeRTOS buffer

Lecture 30 freeRTOS stream buffer 01

Lecture 31 freeRTOS stream buffer 02

Lecture 32 freeRTOS message buffer 01

Lecture 33 freeRTOS message buffer 02

the person who is interested in freeRTOS,the person who is interested in ESP32