Arduino入門
2. デバイス＆サンプル
3. M5Unified
5. 拡張モジュール＆サンプル
Atom DTU
Hat
Button
read
Syntax:
uint8_t read();Description:
- Read Button status
Parameters:
- null
Return:
- uint8_t:
- 1:Button Press
- 0:Button Release
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
M5.Lcd.println("Please pressed Button A.");
}
void loop() {
M5.Lcd.setCursor(0, 0);
M5.Lcd.printf("Button A Status: %d ",M5.BtnA.read());
}lastChange
Syntax:
uint32_t lastChange();Description:
- Get the time of the last status update
Parameters:
- null
Return:
- uint32_t: Time of last status update ms
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
M5.Lcd.println("Please pressed Button A.");
}
void loop() {
M5.update();
M5.Lcd.setCursor(0, 0);
M5.Lcd.printf("The last change at %d ms /n",M5.BtnA.lastChange());
}isPressed
Syntax:
uint8_t isPressed();Description:
- Determine if a Button is pressed
Parameters:
- null
Return:
- uint8_t:
- 1: Button is pressed
- 0: Button is not pressed
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
M5.Lcd.println("Please pressed Button A.");
}
void loop() {
M5.update();
M5.Lcd.setCursor(0, 0);
if (M5.BtnA.isPressed()) {
M5.Lcd.println("Button is Pressed.");
}else{
M5.Lcd.println("Button is Released.");
}
delay(20);
}wasPressed
Syntax:
uint8_t wasPressed();Description:
- Determine if a Button has changed from released to pressed.
Parameters:
- null
Return:
- uint8_t:
- 1: Trigger Button to change from released to pressed state
- 0: Untriggered Button changes from released state to pressed state
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
M5.Lcd.println("Please pressed Button A.");
}
void loop() {
M5.update();
if (M5.BtnA.wasPressed()) {
M5.Lcd.println("Button is pressed.");
}
delay(20);
}pressedFor
Syntax:
uint8_t pressedFor(uint32_t ms);Description:
- Determine if a Button has been pressed for longer than the specified timeout period.
Parameters:
- uint32_t ms：
- Button press timeout ms
Return:
- uint8_t:
- 1: Trigger Button release beyond timeout
- 0: non-triggered
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
M5.Lcd.println("Please pressed Button A.");
}
void loop() {
M5.update();
if (M5.BtnA.pressedFor(2000)) {
M5.Lcd.println("Button A was pressed for more than 2 seconds.");
delay(1000);
}
}isReleased
Syntax:
uint8_t isReleased();Description:
- Determine if a Button is in the released state
Parameters:
- null
Return:
- uint8_t:
- 1: Button is released.
- 0: Button are not released.
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
}
void loop() {
M5.update();
if (M5.BtnA.isReleased()) {
M5.Lcd.println("Button is released.");
}else{
M5.Lcd.println("Button is Pressed .");
}
delay(20);
}releasedFor
Syntax:
uint8_t releasedFor(uint32_t ms);Description:
- Determine Button release timeout
Parameters:
- uint32_t ms：
- Button release timeout ms
Return:
- uint8_t:
- 1: Trigger Button release beyond timeout
- 0: non-triggered
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
}
void loop() {
M5.update();
M5.Lcd.setCursor(0, 0);
if (M5.BtnA.releasedFor(2000)) {
M5.Lcd.println("Button A was released for more than 2 seconds.");
delay(1000);
}else{
M5.Lcd.println("Button A is pressed ");
}
}wasReleased
Syntax:
uint8_t wasReleased();Description:
- Determine if a Button is pressed and released.
Parameters:
- null
Return:
- uint8_t:
- 1: Trigger button changes from pressed state to released state
- 0: Untriggered Button changes from pressed to released state
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
M5.Lcd.println("Please pressed Button A.");
}
void loop() {
M5.update();
if(M5.BtnA.wasReleased()) {
M5.Lcd.println("Button is Released.");
}
delay(20);
}wasReleasefor
Syntax:
uint8_t wasReleasefor(uint32_t ms);Description:
- Determine if a Button has been pressed for more than the specified timeout, and trigger when the Button is released.
Parameters:
- uint32_t ms：
- Button release timeout ms
Return:
- uint8_t:
- 1: Trigger Button release beyond timeout
- 0: non-triggered
Example:
#include <M5Stack.h>
void setup() {
M5.begin();
M5.Lcd.println("Please pressed Button A.");
}
void loop() {
M5.update();
if (M5.BtnA.wasReleasefor(3000)) {
M5.Lcd.println("OK");
}
}