麦克风入门指南

本教程介绍如何在 Wio Terminal 中使用内置麦克风进行音频输入。麦克风可用于检测周围声音并做出相应响应。

note

本教程仅演示麦克风的基本功能，我们正在为 Wio Terminal 开发麦克风库以实现更多功能！敬请期待！

示例代码

注意：WIO_MIC 是为内置麦克风定义的。

void setup() {
  pinMode(WIO_MIC, INPUT);
  Serial.begin(115200);
}

void loop() {
  int val = analogRead(WIO_MIC);
  Serial.println(val);
  delay(200);
}

带 LCD 屏幕的示例代码

库安装

• 安装 LCD 库。

• 安装 Linechart 库。

#include"seeed_line_chart.h" //include the library
#include <math.h>

TFT_eSPI tft;

#define max_size 50 //maximum size of data
doubles data; //Initilising a doubles type to store data
TFT_eSprite spr = TFT_eSprite(&tft);  // Sprite 

void setup() {
    pinMode(WIO_MIC, INPUT);

    tft.begin();
    tft.setRotation(3);
    spr.createSprite(TFT_HEIGHT,TFT_WIDTH);
}

void loop() {
    spr.fillSprite(TFT_DARKGREY);

    int val = analogRead(WIO_MIC);

    if (data.size() == max_size) {
        data.pop();//this is used to remove the first read variable
    }
    data.push(val); //read variables and store in data

    //Settings for the line graph title
    auto header =  text(0, 0)
                .value("Microphone Reading")
                .align(center)
                .color(TFT_WHITE)
                .valign(vcenter)
                .width(tft.width())
                .thickness(2);

    header.height(header.font_height() * 2);
    header.draw(); //Header height is the twice the height of the font

  //Settings for the line graph
    auto content = line_chart(20, header.height()); //(x,y) where the line graph begins
         content
                .height(tft.height() - header.height() * 1.5) //actual height of the line chart
                .width(tft.width() - content.x() * 2) //actual width of the line chart
                .based_on(0.0) //Starting point of y-axis, must be a float
                .show_circle(true) //drawing a cirle at each point, default is on.
                .y_role_color(TFT_WHITE)
                .x_role_color(TFT_WHITE)
                .value(data) //passing through the data to line graph
                .color(TFT_RED) //Setting the color for the line
                .draw();

    spr.pushSprite(0, 0);
    delay(50);
}