Week 4 - Embedded Programming

Group Assignment

In our group assignment we compared the performance and development workflows for 3 different boards :

XIAO PR2040

Arduino Uno

Node MCU v3

here is the group assignment link for more details https://fabacademy.org/2023/labs/egypt/group-assignments.html#4 What I have learned so far ?

RP2040 Tech Specifications

Dual-core Arm Cortex-M0+ processor, flexible clock running up to 133 MHz

2 × UART, 2 × SPI controllers, 2 × I2C controllers, 16 × PWM channels

1 × USB 1.1 controller and PHY, with host and device support

8 × Programmable I/O (PIO) state machines for custom peripheral support

Supported input power 1.8–5.5V DC

Operating temperature -40°C to +85°C

XIAO RP2040 Specifications

Seeed Studio XIAO RP2040 is compatible with the Raspberry Pi RP2040 ecosystem

as they share the same RP2040 chip. It supports multiple languages including C / MicroPython

Features: High Performance: Powered by Raspberry Pi 2040 chip, dual-core operating up to 133 MHz

Ultra-small Design: 21 x 17.5mm

Multiple Development Interfaces: 2x buttons, 11x digital I/O , 4x analog pins

Setup Process Of RP2040 On Arduino IDE

Launch the Arduino application.

Navigate to File > Preferences, and fill Additional Boards Manager URLs with the url below: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json

Navigate to Tools-> Board-> Boards Manager. type the keyword "RP2040 " in the searching blank. Select the latest version of "Raspberry Pi Pico/RP2040" and install it.

Individual Assignment

Hello Echo in Arduino

find the code on the website http://academy.cba.mit.edu/classes/embedded_programming/RP2040/hello.RP2040-XIAO.blink-echo.ino

//
// hello.RP204-XIAO.blink-echo.ino
//
// Seeed XIAO RP2040 blink and echo hello-world
//
// Neil Gershenfeld 2/12/23
//
// This work may be reproduced, modified, distributed,
// performed, and displayed for any purpose, but must
// acknowledge this project. Copyright is retained and
// must be preserved. The work is provided as is; no
// warranty is provided, and users accept all liability.
//
#include <Adafruit_NeoPixel.h>
//
// globals
//
#define numpixels 1
#define pixelpower 11
#define pixelpin 12
#define bufsize 25
char buf[bufsize];
int count=0;
//
// setup
//
Adafruit_NeoPixel pixel(numpixels,pixelpin,NEO_GRB+NEO_KHZ800);
void setup() {
   Serial.begin();
   pixel.begin();
   pinMode(pixelpower,OUTPUT);
   digitalWrite(pixelpower,HIGH);
   }
//
// main loop
//
void loop() {
   char chr;
   //
   // check for a char
   //
   if (Serial.available()) {
      //
      // read, save, and send char
      //
      chr = Serial.read();
      buf[count] = chr;
      count += 1;
      buf[count] = 0;
      if (count == (bufsize-1))
         count = 0;
      Serial.print("hello.RP2040-XIAO.blink-echo.ino: you typed ");
      Serial.println(buf);
      //
      // blink LED red green blue white black
      //
      pixel.setPixelColor(0,pixel.Color(255,0,0));
      pixel.show();
      delay(100);
      //
      pixel.setPixelColor(0,pixel.Color(0,255,0));
      pixel.show();
      delay(100);
      //
      pixel.setPixelColor(0,pixel.Color(0,0,255));
      pixel.show();
      delay(100);
      //
      pixel.setPixelColor(0,pixel.Color(255,255,255));
      pixel.show();
      delay(100);
      //
      pixel.setPixelColor(0,pixel.Color(0,0,0));
      pixel.show();
      pixel.show();
      }
   }