Arduino 上手教程
2. 设备开发 & 案例程序
3. M5Unified
4. M5GFX
5. 拓展模块
Unit
Base
Cap
IoT
Unit PoE-P4 Button 按键
Unit PoE-P4 按键输入相关 API 与案例程序。
注意事项
使用时需要在主循环中包含
M5.update() 函数用于读取状态更新，且尽可能减少阻塞，否则可能无法及时获取按键变化。案例程序
编译要求
- M5Stack 板管理版本 >= 3.2.6
- 开发板选项 = M5UnitPoEP4
- M5Unified 库版本 >= 0.2.13
cpp
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#include "M5Unified.h"
void setup() {
M5.begin();
Serial.begin(115200);
}
void loop() {
M5.update();
if (M5.BtnA.wasPressed()) {
Serial.println("BtnA was pressed");
}
if (M5.BtnA.wasReleased()) {
Serial.println("BtnA was released");
}
if (M5.BtnA.wasSingleClicked()) {
Serial.println("BtnA was single clicked");
}
if (M5.BtnA.wasDoubleClicked()) {
Serial.println("BtnA was double clicked");
}
if (M5.BtnA.wasHold()) {
Serial.println("BtnA was held");
}
}该程序将检测设备正面按键的状态（按下、松开、短按一次、短按两次、长按），并在串口监视器打印消息（例如）：
BtnA was pressed
BtnA was released
BtnA was single clicked
BtnA was pressed
BtnA was held
BtnA was releasedAPI
Unit PoE-P4 按键部分使用了 M5Unified 库中的Button_Class，更多相关的 API 可以参考下方文档：