Raspberry PI PICO Micro Projects (C++)

Review raspberry PI Pico tool setup to be able to compile and deploy binaries onto the Pico. Testing this with the Blink test project.

Review other RP2040 devices you could also use.

Review the "Tool chain" needed for the course.

Describes the two binary deployment methods Boot Select and SWD.

A test project to blink the onboard LED.

Consider some other RP2040 devices that we could also target.

Section summary and resources.

1. What is a LED

2. Connecting LED to Pico

3. Operating the LED

4. Fading the LED

Review the common types of LED and the ones we will use in this course.

Looks at the approaches for LED to be connected to the Pico. Using the sourcing or sinking pattern.

How the value of the resistor is calculated, though generally, we can use a cheat sheet.

Using PWM to control the brightness of an LED.

Animating the brightness of an LED to fade.

Section summary

1. What is a WS2812B

2. Connecting WS2812B to Pico

3. Operating the WS2812B

4. Animating the WS2812B

What is the WS2812B and types available.

How we connect the WS2812B to the Pico.

We will use a library to connect to drive the WS2812B.

A simple example to drive the LED Ring to show the colours of the rainbow.

An animation of a chaser pattern around the LED Ring.

Three animation demos on the LED Ring.

Section summary.

• Review types of switches

• Pull-up and Pull-down switch configuration

• Connecting switch to RP2040

• Software strategies: Polling and Interrupt

• Reset Switch

Review the common types of switches available.

Circuits for connecting a switch to the Pico.

Two patterns were introduced in connecting a switch to the Pico, Pull Up and Pull Down.  This lecture dives deeper into the theory and choice of resistors in these patterns.

C++ example to poll the switch and take some action. In this example latch an LED.

C++ example to act on a switch press via an interrupt. In this example latch an LED.

How to add a reset switch to the Pico.

Section Summary.

1. Review types of Rotary Encoders

2. Connecting to RP2040

3. Software strategy: Polling

Review types of rotary encoders, though this course, will focus on mechanical rotary encoders.

Circuits for connecting the Rotary Encoder to the Pico.

Rotary Encoder uses two channels A and B to allow the detection of Clockwise and Counterclockwise motion. We need to understand these signal before we consider the software.

An example of using a polling strategy to read the Rotary Encoder and act on rotations. Moving the illuminated LED on the LED RIng around the ring based on the Rotary Encoder movement.

Section Summary

1. Review types of PIR

2. Connecting to RP2040

3. Software strategy

This course focuses on the HC-SR501 but in this lecture considers some alternatives.

Connecting the HC-SR501 PIR module to the Pico.

C++ Example to turn on the LED when the PIR detects motion.

C++ Example to turn on the LED when the PIR detects motion and remains active for 10 seconds following the last detect event.

Section Summary.

1. Build the Big Project

2. Rotary Encoder configured Animations

3. PIR Activated Animations

4. Extend as an assignment by adding speed control

The project is centrally about displaying animation sequences on the LED ring. Instead of just displaying these in the sequence we will now allow the animation to be selected through the rotary encoder.

Introduce the components and connections in the schematic and on the breadboard.

C++ Example of the three animations and using the Rotary Encoder to move between them.

Adding the PIR to the example to only turn on the LED Ring when someone is in the room.

Section Summary

Congratulations on completing the course. Thank you for taking part and please do leave me a review.