[Postponed] ATtiny85 SMD. This project is designed to provide you with increased SMD soldering exposure, flashing experience from AS7, and AVR assembly programming confidence.

The adjacent breadboard-friendly SMD PCB was developed in early March 2020, specifically to address the issues arising from the challenge of the Medium ISP SMD expectations. In retrospect, we should have undertaken this project in early January, and that's on me. EAGLE files for this device can be obtained from our ACES Optimization Github Repository.

Task.

1. Soldering the male THT headers LAST, employ a soldering technique of your preference to assemble the supplied components onto the PCB provided.
2. Download the EAGLE files and study the schematic to determine the connections.
3. Create a new AS7 AVR Assembly project, entitled ATTiny85_SMD and develop UNIQUE-TO-YOU AVR Assembly code to exercise and maximize the PCB's on-board assets and off-board breadboard capabilities.
4. Comment the code thoroughly.
5. Create a new DER Entry entitled ATtiny85 SMD and submit by the deadline under the Subject Line: ATtiny85 SMD.

Shiftout. For your next AVR Assembly project submission you will cover very familiar ground and take it to its deepest level yet. With each new, measured, and highly-focused task, your skill and confidence will (should!) grow.

The composite image to the right reveals how the DDB's pin arrangement was designed to integrate perfectly with the MBv3. Click to enlarge.

Task.

Using the knowledge and skill accumulated over the past two years, especially the register-level C code discussed in our Meets this week, develop the AVR assembly code shiftout.asm (or shiftout.S) to directly manipulate the PORTA and PORTB bits (using the sbi and cbi instructions) in an orchestrated manner, to have the Morland Bargraph present an 8-bit binary constant on the lower 8 LEDs of your Morland Bargraph v3. (Note. If you do not have an MBv3 with you at home, simply wire up a '595 to the DDP and 8 LEDs in a similar manner with respect to the 84's PORT bits)

For this submission, I'm limiting it to the creation of a well-structured, planned, and strategically-shot and presented 3:00 video (maximum) that encompasses as many of the video presentation skills we've discussed over the years. The result should leave the viewer with crystal clear clarity of the concepts in play and a solid sense of how your code works. (Hint: This will take serious planning and organization). Finally, think of this in the style of a video resumé you may be asked for in the future by a potential employer.

You are to attach your doucmented code to your email to handin as well.

Bicolor Byte. For your first formal AVR Assembly project submission you are asked exploit use of the code functions we developed last class to interpret a byte as an (MSBFIRST) colour sequence on a bicolor LED. The code is to be Green for 1 and Red for 0. Each colour is to be held for 1 second, with no delay or gap in between. At the end of the 8 bit/colour sequence, turn the LED off for 3 seconds before repeating, indefinitely.

Example. If the program 'played' the byte value 0xAA, the colour sequence would appear as in the animated gif to the right: GRGRGRGROOO where G-green, R-red, and O-off.

Note. Documentation and artfully-crafted statement comment writing are skills unto themselves. You will be held to high account on this point in university, so accept it. You can prepare for this eventuality by presenting your code, masterfully, in your DER next weekend.

Dolgin Development Board Legacy Shield

Task.

1. You are to develop a creative, SMD-based shield for the DDB that would embody legacy potential.
2. Prototype an ATtiny84-based applicationas proof of viability and concept
3. Developed EAGLE schematic and board files with respect to the specifications of the DDB base below. Custom ACES THT and SMD EAGLE Libraries can be downloaded from the top of our course page
4. Order a set of 5 boards from JLCPCB. You may wish to organize a group order to reduce shipping costs.
5. Be sure to have a complete inventory of parts on hand when your boards arrive.
6. Ideas: Charlieplex Matrix, AT28C16 EEPROM Programmer,

Dolgin Development Board Shields. Modelling the Arduino's 'Shield' concept for the Dolgin Development Board, I designed two (THT) shields that can be assembled, inserted into the female headers and programmed. These appear below.

Soldering Considerations

• The PITCH of the small seven segment display is 0.05" (half of the 0.1" pitch you are used to for through hole parts) so you are encouraged to use the finer soldering tip and be ACCURATE.
• Since solder holes are tight, be careful not to accidentally fill nearby holes. Removing the solder later can be tough.
• Since some of the parts are relatively tall, you are encouraged to solder the components from the center of the board to the outside

Task.

1. Carefully assemble the two shields below using the parts you have been provided with.
2. TBC...

Intersection Shield	Analog-to-Digital Conversion (ADC) Shield

Dolgin Development Board. J. Dolgin (ACES' 20) continued the ACES commitment to excellence by developing a compact AVR development board based on the ATtiny24/44/84 MCU suite for his Grade 11 legacy PCB project. This board will serve as a substantial contributor to the exploration of advanced MCU hardware, software, and design pursuits in this year's Senior ICS4U curriculum.

Design files for this device (.sch, .brd, and .f3d) can be downloaded for personal use from,

https://github.com/rsgcaces/AVROptimization/tree/master/DolginDevelopmentBoard

Task.

1. Assemble your DDB using the additional components supplied.
2. Install the board into the custom case Josh has provided you.
3. With reference to this ATtimy84 pin diagram, strategically insert your Morland Bargraph from Grade 11 into your DDB.
4. Develop high-level Arduino C code to exercise it.
5. Submit a new DER project summary under the title Dolgin Development Board.

Project 3.2. CharlieStick. The software side of the final two terms of your ACES experience is invested in the exploration of the native language of the AVR family of microcontrollers, simply referred to as AVR Assembly. This justifies the alternate name for our course, AVR Optimization, for it is only through coding in the native language of the microcontroller can the most efficient performance be realized. In preparation for that journey, we will first investigate a few advanced Arduino C software techniques that involve the use of register-level instructions (iom328p.h). The first of these engages a technique known as Charlieplexing.

3.2.1. (30 min. assembly time) To further your SMT soldering skiils amongst other goals, a custom-designed ACES' PCB appliance consisting of 12 SMT 1206 LEDs, 1 SMT 1206 220 Ω Resister Array and a 1×4 pin header has been developed for use with this project. A photo of an assembled and fully active CharlieStick appliance appears to the right. For the first part of this project you are asked to find time this week to assemble your PCB using one of our two Auyoe 968A Rework stations. When completely soldered, bring it to me and I'll test it in my Arduino platform on either Monday, Wednesday, or Friday. I'll add your initials and return it to you for your DER submission on Saturday October 26.

Task.

1. You are to surface mount solder 4 Green, 4 Yellow and 4 Red (bottom to top) using your preferred method, solder pen, air or bake (if Eric and Simon do their job!)
2. Create a report entitled, Project 3.2. CharlieStick with all the standard subsections including 3.2.1 in which you document this initial task and the soldering process, in text, photos and images.
3. Include the schematic after and explain it to the best of your ability.
4. Submit your Report by this Saturday.

3.2.2. See here...

Project 3.1. GB Machine. The greatest challenge (and privilege) for ACES is to influence the direction of our program. Through your imagination and skill you are expected to contribute to the enhancement of our mutual creativity, tool set, and assets. G. Benson (ACES' 19) fulfilled this opportunity/commitment through his enhancement of the indispensable PB Machine (P. Bagga, ACES '17). Beginning in the Fall of 2019, Grade 11 and 12 ACES will be expected to solder up their own GB machine and put it to good use in the pursuit of their own prototypes.

Your experience with electric circuits has been largely limited to components that use through-hole technology (THT). To round out your proficiency with all components, your next few projects will require the use of devices that use surface-mount technology (SMT). As the graphic reveals, the smallest size that is reasonable for hand-soldering techniques is the 1206 family, so this is what we carry in the DES inventory.

GB Machine	1206 LED Package

Task.

1. In his final ACES year, G. Benson (ACES '19) redesigned the PB Machine (RSGC ACES DC Power Jack developed by P. Bagga (ACES '17)). Affectionately referred to as the GB Machine, this breadboard appliance includes supply rail spanning, ON/OFF switching, diode protection, and optional features that include 5V regulation and ON/OFF LED indication. You will be given a small parts kit that includes the PCB, a THT DC Power Jack, power diode, 7805 voltage regulator, two mini SPDT slide switches, and two 2x3 male header sets. You can choose your 1206 SMT LED colour from our inventory of red, green, blue, or amber and your 1206 resistor from our inventory of 330Ω, 1kΩ, or 10kΩ.
2. Using a digital soldering station for the THT components and either of the AOYUE 968 Hot Air Rework Stations for the SMT parts, assemble your GB Machine
3. Develop the first DER Report of your ICS4U course and submit by the deadline.
4. Bring your device to the first class following the submission date for inspection.