Follow me Season 2, first task submission Arduino

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Follow me Season 2, first task submission Arduino [Copy link]

<i class="pstatus"> This post was last edited by Xidian Primary School Monk on 2024-8-28 22:12 </i> # Material Introduction## The mainboard used in this event is Adafruit Circuit Playground Express. It is based on the ATSAMD21 microcontroller and uses a 32-bit ARM Cortex-M0+ core. The ATSAMD21 uses advanced power management technology and has extremely low current consumption. It can be powered by USB, "AAA" battery pack, or Lipoly battery. The sensor package circular Circuit Playground Express board has alligator clip pads on the edge for easy connection to the project without soldering. It can be programmed via the built-in USB quick connection without the need for dedicated cables or adapters. Here are the specs:10 Mini NeoPixel LEDs, each of which can display any color of the rainbow1 motion sensor (LIS3DH 3-axis XYZ accelerometer) with tap and free-fall detection1 temperature sensor (MMBT2222)1 light sensor (ALSPT1931), which can also be used as a color or pulse sensor1 sound sensor (MEMS microphone)IR transmitter and receiver (DSOP38338), which can transmit and receive remote control codes, send messages between Circuit Playground Expresses, or use as a proximity sensor1 mini speaker with Class-D amplifier (7.5mm magnetic speaker/buzzer)2 buttons, labeled A and B1 slide switch8 easy-to-use alligator clip I/O pins (including I2C, UART, 8 analog inputs/multiple PWM outputs)7 pads can be used as capacitive touch inputs, the remaining pad is a true analog outputGreen “ON” LEDRed "#13" LED for basic blinkingReset button## Servo The servo is the FS90R servo purchased with the order. The FS90R is a 360° continuous rotation servo motor. At 6V, its maximum speed is about 130 RPM (no load) and can produce up to 1.5 kg cm of torque. The servo system can be controlled by connecting directly to a single microcontroller I/O line without any other electronics. ## The ultrasonic sensor task uses the HC-SR04 ultrasonic sensor to achieve the ranging function. ## Image 
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 # Task implementation## Getting started task: Development environment construction, onboard LED lighting Use the Adafruit NeoPixel library to drive the onboard NeoPixel to light up. Instantiate the pixels object to operate NeoPixel, and the setPixelColor function is used to set the color of the pixel. ### Code main.cpp ```C #include<arduino.h>
#include <adafruit_neopixel.h>

#define PIN 8 #define NUMPIXELS 10 void setup() { // write your initialization code here Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); pixels.begin(); for (uint16_t i = 0; i < NUMPIXELS; i++) pixels.setPixelColor(i, Adafruit_NeoPixel::Color(10, 10, 10)); pixels.show(); } void loop() { // write your code here } ``` ### Flowchart```flow init=>start: resource initialization led=>operation: turn on the onboard LED loop=>end: loop waiting st=>start: user login op=>operation: login operation cond=>condition: login successful Yes or No? e=>end: enter the background init->led->loop ``` ### Actual picture 
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 For dynamic video, please check the link after the article## Basic Task 1: Control the onboard colorful LED, the marquee lights up and changes colors### Code main.cpp ```C #include<arduino.h>
#include<adafruit_neopixel.h>

#define PIN 8 #define NUMPIXELS 10 Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); void setup() { // write your initialization code here pixels.begin(); } void loop() { // write your code here static uint8_t led_num = 0; static uint32_t colors[7] = {0x0A0000, 0x000A00, 0x00000A, 0x050500, 0x050005, 0x000505, 0x040304}; static uint8_t color_num = 0; static Adafruit_NeoPixel pixels( NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); pixels. clear(); pixels.setPixelColor(led_num, colors[color_num]); pixels.show(); led_num++; if (led_num == NUMPIXELS) { led_num = 0; color_num++; if (color_num == 7) color_num = 0; } delay(100); } ``` # ## Flowchart ```flow init=>start: resource initialization led=>operation: turn on the first LED and wait for 1s nextled=>operation: turn off all LEDs and turn on the next LED and wait for 1s round=>condition : Check if it is the last LED color=>operation: switch colors and light up from the first LED st=>start: User login op=>operation: Login operation cond=>condition: Login successful Yes or No? e= >end: Enter the background init->led->nextled->round round(yes)->color round(no)->nextled color->nextled ``` ### Actual picture 
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 For dynamic video, please check the link after the article## Basic Task 2: Monitor ambient temperature and light, and display comfort level through onboard LEDs According to the schematic diagram and CircuitPython library code released by Adafruit on Github, the pin voltage and temperature can be obtained , the relationship between light. 
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 ### Code main.cpp ```C #include<arduino.h>
#include <adafruit_neopixel.h>
#include "Sensor.h"

#define PIN 8
#define NUMPIXELS 10

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  // write your initialization code here
  Serial.begin(115200);
  pixels.begin();
}

void loop() {
  // write your code here
  const double temperature = get_temperature(A9);
  const double photocell = get_photocell(A8);
  pixels.clear();
  if (temperature < 14) {
  pixels.setPixelColor(5, 0, 0, 10);
  } else if (temperature < 18 && temperature >= 14) {
  pixels.setPixelColor(6, 0, 5, 5);
  } else if (temperature >= 18 && temperature <= 26) {
  pixels.setPixelColor(7, 0, 10, 0);
  } else if (temperature > 26 && temperature <= 30) {
  pixels.setPixelColor(8, 5, 5, 0);
  } else if (temperature > 30) {
  pixels.setPixelColor(9, 10, 0, 0);
  }
  if (photocell > 1000) {
  pixels.setPixelColor(0, 10, 0, 0);
  } else if (photocell > 500 && photocell <= 1000) {
  pixels.setPixelColor(1, 5, 5, 0);
  } else if (photocell >= 200 && photocell <= 500) {
  pixels.setPixelColor(2, 0, 10, 0);
  } else if (photocell >= 50 && photocell < 200) {
  pixels.setPixelColor(3, 0, 5, 5);
  } else if (photocell < 50) {
  pixels.setPixelColor(4, 0, 0, 10);
  }
  pixels.show();
  Serial.print("temperature:" + String(temperature) + "℃\n" + "photocell:" + String(photocell) + "lux\n");
  delay(1000);
}
```
Sensor.h
```C
//
// Created by SLCTX on 24-7-30.
//

#ifndef SENSOR_H
#define SENSOR_H

#include <arduino.h>

#define R_T2 10000 #define B 3380000 #define T2 25 double get_temperature(uint32_t pin); double get_photocell(uint32_t pin); #endif //SENSOR_H ```` Sensor.cpp ````C // // Created by SLCTX on 24 -7-30. // #include "Sensor.h" double get_temperature(const uint32_t pin) { return 1.0/(log(1023.0/analogRead(pin)-1)/3950.0+1.0/(273.15+25))-273.15 ; } double get_photocell(const uint32_t pin) { return analogRead(pin)*3.3/1023.0/2.9*3446; } ``` ### Flowchart``flow init=>start: resource initialization read=>operation: read light brightness and temperature led=>operation: light up the corresponding LED according to brightness and temperature wait=>operation: wait for 1 second st=>start: user login op=> operation: login operation cond=>condition: login successful Yes or No? e=>end: enter the background init->read->led->wait->read ``` ### Actual picture [attach]836839[/attach ] For dynamic video, please see the link after the article## Basic Task 3: Proximity Detection - Set a safe distance and display it through the onboard LED. When an intrusion is detected, an audible alarm is issued. According to the schematic diagram released by Adafruit, it can be seen that the infrared receiver There is a decoder between the device and the processor. Due to time constraints, it was not possible to write a usable encoding logic and decoding logic, so an external ultrasonic sensor is used for proximity detection. 
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 ### Code main.cpp ```C #include<arduino.h>
#include <adafruit_neopixel.h>
#include "Ultrasonic.h"

#define PIN 8
#define NUMPIXELS 10

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  // write your initialization code here
  Serial.begin(115200);
  pixels.begin();
  pinMode(A0,OUTPUT);
}

void loop() {
  // write your code here
  static int time = 0;
  static bool sound = false;
  if (time == 1000) {
  double distance = getDistance(A2, A1);
  pixels.clear();
  for (uint8_t tmp = 0, distance_level = distance > 100 ? 9 : distance / 10; tmp <= distance_level; tmp++) {
    pixels.setPixelColor(tmp, 9 - tmp, 0 + tmp, 0);
  }
  sound = distance<30;
  Serial.println("distance:" + String(distance) + "cm");
  pixels.show();
  time = 0;
  }
  if (sound) {
  digitalWrite(A0, time % 2);
  } else {
  digitalWrite(A0, 0);
  }
  time++;
  delay(1);
}
```
Ultrasonic.h
```C
//
// Created by SLCTX on 24-8-17.
//

#ifndef ULTRASONIC_H
#define ULTRASONIC_H
#include <arduino.h>

double getDistance(uint32_t trigPin,uint32_t echoPin); #endif //ULTRASONIC_H ``` Ultrasonic.cpp ``C // // Created by SLCTX on 24-8-17. // #include "Ultrasonic.h" double getDistance (uint32_t trigPin,uint32_t echoPin) { uint32_t times = 0; pinMode(trigPin,OUTPUT); pinMode(echoPin,INPUT); digitalWrite(trigPin,1); delayMicroseconds(15); digitalWrite(trigPin,0); for(uint32_t tmp = 0;!digitalRead(echoPin);tmp++) { if(tmp==0xFFFF) { return -1.0; } } times = micros(); for(uint32_t tmp = 0;digitalRead(echoPin);tmp++) { if(tmp==0xFFFF) { return -1.0; } } times = micros() - times; return 0.034*times/2; } ``` ### Flowchart`` `flow init=>start: resource initializationread=>operation: read distanceled=>operation: light up the corresponding LEDdistance=>condition: determine whether the distance is below the alarm linesound=>operation: drive the speaker to alarmwait=> operation: wait 1 second st=>start: user login op=>operation: login operation cond=>condition: login successful Yes or No? e=>end: enter the background init->read->led->distance distance(yes )->sound->wait distance(no)->wait wait->read ``` ### Actual picture 
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 For dynamic video, please check the link after the article## Advanced Task: Make a tumbler - Show different lighting effects during the tumbler's movement. The onboard acceleration sensor model is LIS3DH. The sensor uses I2C to connect to the processor and uses I2C communication to obtain acceleration data. ### Code main. cpp ```C #include<arduino.h>
#include <adafruit_neopixel.h>

#include "Acceleration.h"

#define PIN 8
#define NUMPIXELS 10

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  // write your initialization code here
  Serial.begin(115200);
  pixels.begin();
  if (!init_acceleration()) {
  Serial.println("ERROR");
  }
}

void loop() {
  // write your code here
  std::array<double, 2=""> data = get_acceleration();
  double length = sqrt(pow(data[0], 2) + pow(data[1], 2));
  int degree = atan(-1 * data[0] / data[1]) / M_PI * 180;
  degree += data[0] * data[1] >= 0 ? 180 : 0;
  pixels.clear();
  if (degree >= 15 && degree <= 165) {
  pixels.setPixelColor((degree-15)/30+(data[0]<0?5:0), length*10, abs(10-length*10), 0);
  }
  pixels.show();
  Serial.println("X:" + String(data[0]));
  Serial.println("Y:" + String(data[1]));
  Serial.println("degree" + String(degree));
  Serial.println();
  delay(100);
}
```
Acceleration.h
```C
//
// Created by SLCTX on 24-8-18.
//

#ifndef ACCELERATION_H
#define ACCELERATION_H
#include <arduino.h>
#include <array>
#include<wire.h>

bool init_acceleration();
std::array<double,2> get_acceleration();

#endif //ACCELERATION_H
```
Acceleration.cpp
```C
//
// Created by SLCTX on 24-8-18.
//

#include "Acceleration.h"

#define LISADDR 0x19

bool init_acceleration() {
  Wire1.begin();
  delay(1000);
  Wire1.beginTransmission(LISADDR);
  Wire1.write(0x0f);
  Wire1.endTransmission();
  Wire1.requestFrom(LISADDR, 1);
  if (0x33 != Wire1.read()) {
  return false;
  }
  Wire1.beginTransmission(LISADDR);
  Wire1.write(0x24);
  Wire1.write(0x80);
  Wire1.endTransmission();
  delay(1000);
  Wire1.beginTransmission(LISADDR);
  Wire1.write(0x20);
  Wire1.write(0x23);
  Wire1.endTransmission();
  Wire1.beginTransmission(LISADDR);
  Wire1.write(0x23);
  Wire1.write(0x88);
  Wire1.endTransmission();
  return true;
}

std::array<double, 2=""> get_acceleration() {
  std::array<double, 2=""> data;
  Wire1.beginTransmission(LISADDR);
  Wire1.write(0x28 | 0x80);
  Wire1.endTransmission();
  Wire1.requestFrom(LISADDR, 4);
  for (int tmp = 0; tmp < 3; tmp++) {
  data[tmp] = static_cast<int16_t>(Wire1.read() | Wire1.read() << 8) / 16; data[tmp] /= 1000.0; } return data; } ``` ### Flowchart```flow init=>start: resource initializationread=>operation: read accelerationled=>operation: light up the corresponding LEDwait=>operation: wait for 1 secondst=>start: user loginop=>operation: login operationcond=>condition: login successfulYes or No? e=>end: enter the backgroundinit->read->led->wait->readwait->read ``` ### Actual picture
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 For dynamic video, please see the link after the article## Creative Task 2: Squidward - Squidward's tentacles can expand or contract according to the size of the ambient sound. Since the onboard microphone uses a MEMS microphone, a lot of calculations are required to obtain the sound size, so the Adafruit Zero PDM Library is used to calculate the sound size. Use the Servo library to control the servo. ### Code main.cpp ```C #include<arduino.h>
#include<adafruit_neopixel.h>
#include<servo.h>
#include "Volume.h"

#define PIN 8
#define NUMPIXELS 10

Adafruit_ZeroPDM pdm = Adafruit_ZeroPDM(34, 35);
uint16_t sincfilter[DECIMATION] = {
  0, 2, 9, 21, 39, 63, 94, 132, 179, 236, 302, 379, 467, 565, 674, 792, 920, 1055, 1196, 1341, 1487, 1633, 1776, 1913,
  2042, 2159, 2263, 2352, 2422, 2474, 2506, 2516, 2506, 2474, 2422, 2352, 2263, 2159, 2042, 1913, 1776, 1633, 1487,
  1341, 1196, 1055, 920, 792, 674, 565, 467, 379, 302, 236, 179, 132, 94, 63, 39, 21, 9, 2, 0, 0
};
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

Servo servo;
int time = 0;
int max_volume = 0;

void setup() {
  // write your initialization code here
  Serial1.begin(115200);
  Serial1.println("init");
  pixels.begin();
  servo.attach(A1);
  if (!init_volume(pdm)) {
  Serial1.println("volume init failed.");
  while (1);
  }
}

void loop() {
  // write your code here
  uint8_t num;
  int volume = get_volume(pdm, sincfilter);
  if (volume > max_volume) {
  max_volume = volume;
  }
  if (time >= 0) {
  time++;
  if (time < max_volume / 165) {
    if (max_volume / 3300 > 3) {
      servo.writeMicroseconds(1000);
    }
  } else {
    time = -1;
  }
  } else {
  time--;
  if (time > -max_volume / 165) {
    if (max_volume / 3300 > 3) {
      servo.writeMicroseconds(2000);
    }
  } else {
    time = 0;
    servo.writeMicroseconds(1500);
    max_volume = 0;
  }
  }
  num = abs((volume)/3300);
  pixels.clear();
  for (int tmp = 0; tmp <= num; tmp++) {
  pixels.setPixelColor(num, 0 + num, 9 - num, 0);
  }
  pixels.show();
}
```
Volume.h
```C
//
// Created by SLCTX on 24-8-24.
//

#ifndef VOLUME_H
#define VOLUME_H

#include <adafruit_zeropdm.h>

#define SAMPLERATE_HZ 22000
#define DECIMATION  64
#define ADAPDM_REPEAT_LOOP_16(X) X X X X X X X X X X X X X X X X

bool init_volume (Adafruit_ZeroPDM& pdm);

int get_volume(Adafruit_ZeroPDM& pdm,uint16_t* sincfilter);

#endif //VOLUME_H
```
Volume.cpp
```C
//
// Created by SLCTX on 24-8-24.
//

#include "Volume.h"

bool init_volume(Adafruit_ZeroPDM& pdm) {
  if (!pdm.begin()) {
  return false;
  }
  if (!pdm.configure(SAMPLERATE_HZ * DECIMATION / 16, true)) {
  return false;
  }
  return true;
}

int get_volume(Adafruit_ZeroPDM& pdm,uint16_t* sincfilter) {
  uint16_t runningsum = 0;
  for (uint8_t samplenum = 0; samplenum < (DECIMATION / 16); samplenum++) {
  uint16_t sample = pdm.read() & 0xFFFF;
  ADAPDM_REPEAT_LOOP_16(
    {
    if (sample & 0x1) {
    runningsum += *sincfilter; // do the convolution
    }
    sincfilter++;
    sample >>= 1;
    }
  )
  }
  return runningsum - 32768;
}
```
### 流程图
```flow
init=>start: 资源初始化
read=>operation: 读取声音大小
led=>operation: 点亮对应的LED
servo=>operation: 驱动舵机
wait=>operation: 等待0.1秒
st=>start: 用户登陆
op=>operation: 登陆操作
cond=>condition: 登陆成功 Yes or No?
e=>end: 进入后台

init->read->led->servo->wait->read
```
### 实物图

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动态视频请查看文章后的链接
# 感想
Adafruit Circuit Playground Express是个非常有趣且外设丰富的开发板，同时支持arduino、circuitpython、makecode等多种开发语言适合各种群体。在这个活动中学习到了很多开发知识。祝愿EEWROLD的活动能越办越好。
# 资源
## 代码
[任务代码](https://download.eeworld.com.cn/detail/%E8%A5%BF%E7%94%B5%E5%B0%8F%E5%AD%A6%E5%83%A7/634228 "任务代码")
## 视频
[演示视频](https://training.eeworld.com.cn/video/40794 "演示视频")</adafruit_zeropdm.h></servo.h></adafruit_neopixel.h></arduino.h></int16_t></double,></double,></double,2></wire.h></array></arduino.h></double,></adafruit_neopixel.h></arduino.h></arduino.h></adafruit_neopixel.h></arduino.h></arduino.h></adafruit_neopixel.h></arduino.h></adafruit_neopixel.h></arduino.h></adafruit_neopixel.h></arduino.h>

西电小学僧

Hey, why can't this markdown flowchart be displayed normally? I see it is normal in the edit preview.