I2C/TWI (AVR) - This training with introduce the student to the I2C communications/MCC Melody API and demonstrate how to setup an I2C Host on 8-bit AVR with an single I2C EEPROM Device.

Replace "Course Title" with your course title.This training will introduce the student will have knowledge of the I2C communications/Melody API and then be able to setup an I2C Host on 8-bit AVR to a Single Device/client.

Course Outline

Coaching Interview 3. Develop a Course OutlineFrom the Job/Task analysis, group content together into chapters and name the chapters."Knowledge" (Concept/Fact/Principle) bubbles map to "Lessons""Procedure" bubbles map to "Lab Exercises" or "Quizzes" or other hands-on activities.Typically, a 1:1 relationship exists between Major Tasks and Chapters. However, you are free to group knowledge and procedures from several different Tasks into the same Chapter in the course outline.When finished, the TTE will produce a course outline in word format that captures this structure.

Introduce I2C Communication (Host/Single Client) on 8-Bit AVR Device (TWI)

I2C Topology (Host vs Client)

What a Host is

What a Client is

Basic I2C Waveform (Start, Stop, etc.)

Describe the dataflow for read and write

Separately with block diagrams

Basic Communication Speeds

Block Diagram of the AVR TWI Peripheral

TWI vs I2C

Old Version of I2C vs Newer Version of I2C

I2C Host Hardware (Overview of I2C Hardware used in this Training)

AVR DB Device Used in Training

EEPROM Device used in Training

Curiosity Nano and Adapter

Pull-Ups

Click Board

Basic Circuit of I2C/TWI Hardware Setup

I2C Melody Framework/Libraries

Introduction to TWI/I2C MCC Melody View/Options within MPLAB X

Special TWI pins for high speed

Baud rate

FM+/FM/Standard mode and how one must configure differently to achieve the different speeds

Assign I/O pins for SCL/SDA and discuss internal pull-up (often too weak for medium and fast I2C operations)

I2C Host Melody Framework Configuration (I2C Firmware/Configuration for Single Host/Client (EEPROM))

Develop Code Example Using MCC Melody

Screen Capture of Code Entry

Build the Application

I2C Host Demonstration

Connect/Setup the hardware

Program the I2C Host Firmware Interface

Communication Feedback (USART to Computer)

I2C Host Pitfalls

Pullup values, in i2c rise/fall time is essential, this becomes even more important the higher bus speeds you want, in this section also include how to calculate the proper values and how bus capacitance is affected by physical layout.

Baud rate wrong (in the old implementation of i2c, it was set to 100khz bus speed no matter what you told MCC to do…

Wrongful restart of module, how to “unjam” an i2c bus

Clock stretching must be handled by the Host. If it continues to clock the device while it is holing the clock line low the host and device will no longer be synchronized and the data will be corrupted

Noise is detected on the clock line and the host and device are no longer clock synchronized. This can cause data corruption, and in some cases, the device may hold the data line low when the host is trying to send stop bit, locking up the bus. Hosts can often rectify this by repeatedly sending clocks and checking for the data line to de-assert

Host and devices should have “timeouts” which they respect – once a transaction starts (start bit) if clocks are not seen within that timeout period (bus appears to be dead) then reset the module.

Requirements

Coaching Interview 1. Gather top-level project constraints.Interview SME and sponsor to fill in each of the requested constraints.

Due Date

3rd Qtr 2021

Major Job Outcome

What will Attendees be able to produce or accomplish back on the job after taking this training? State it as a noun-phrase, for example:"Customized LoRaWAN demo application using the SAMR34 Module"

At the end of this training the student will have knowledge of the I2C communications/MCC Melody API and then be able to setup an I2C Host on 8-bit AVR communicating with a single I2C EEPROM Device.

Target Audience

Who are the major audience groups the training is targeted to?Expected background knowledge and experience level?

Basic knowledge of I2C Communication

Limited Knowledge of I2C on AVR Devices

Limited Knowledge of AVR Architecture

Experienced with Embedded C Programming

Embedded Software Engineer Experience

Basic Hardware Background (Plug and Play)

Experience with installing, Setup and basic use of MPLAB X, MCC Melody, XC8

Familiar with Microchip Curiosity Nano Development Board and Click Boards

Implementation and Delivery Constraints

Course Type (Lecture-Only, Hands-On)?Course Duration (Hours)? Number of instructors required?

Pre-Recorded Online Video with Demo

No Live Presentation or Questions/Answers

Major Tasks

What are the major engineering tasks required in order to accomplish the Job Outcome?For a Job Outcome of "Custom LoRaWAN demo application using the SAMR34 Module", we could have the following tasks:Evaluate the functional fitness of the SAMR34 for the demo applicationBuild/purchase a hardware prototype for the applicationDownload/Install firmware development toolsWrite and test firmware for the application

Introduce I2C Communication (Host/Single Client) on 8-Bit AVR Device

Overview of I2C Hardware used in this Training

I2C Melody Framework/Libraries

I2C Firmware/Configuration for Single Host/Client (EEPROM)

Code Example/Setup for Demo Application

I2C Host Demonstration

I2C Host Pitfalls