The following programs are encoder applications, but they cannot run normally;
Please advise.
XIAO
/*
- 增量编码器控制（2020）
*/
int encoderPinA = 0;//编码器A
int encoderPinB = 1;//编码器A
int buttonPin = 2;//编码器开关
volatile int lastEncoded = 0;
volatile long encoderValue = 0;
long lastencoderValue = 0;
int lastMSB = 0;
int lastLSB = 0;
int MSB;//MSB = most significant bit
int LSB; //LSB = least significant bit
int encoded; //将2针的值转换为单个数字
int sum; //将其添加到先前的编码值
long readEncoderValue(void) {
return encoderValue / 4;
}
boolean isButtonPushDown(void) {
if (!digitalRead(buttonPin)) {
delay(5);
if (!digitalRead(buttonPin))
return true;
}
return false;
}
void setup() {
Serial.begin (9600);
pinMode(encoderPinA, INPUT);
pinMode(encoderPinB, INPUT);
pinMode(buttonPin, INPUT);
digitalWrite(encoderPinA, HIGH); //打开上拉电阻
digitalWrite(encoderPinB, HIGH); //打开上拉电阻
//call updateEncoder() 当看到任何高/低变化时
//on interrupt 0 (pin 2), or interrupt 1 (pin 3)
/*
中断函数（attachInterrupt）：attachInterrupt（interrupt，function，mode）
interrupt：中断源（在Arduino中，中断源可选值为0或1，一般分别对应2号和3号引脚）
function：需要中断的函数名
mode：LOW（低电平触发）、CHANGE（变化时触发）、
RISING（低电平变为高电平触发）、FALLING（高电平变为低电平触发）
*/
attachInterrupt(0, updateEncoder, CHANGE);
attachInterrupt(1, updateEncoder, CHANGE);
}
void loop() {
//Do stuff here
/*
if (isButtonPushDown()) {
Serial.println(“you push button down!!!”);
}
*/
Serial.println(readEncoderValue());
//delay(50); //只是在这里放慢了输出速度，并显示即使在延迟的情况下它仍然可以工作
}
//中断
void updateEncoder() {
MSB = digitalRead(encoderPinA); //MSB = most significant bit
LSB = digitalRead(encoderPinB); //LSB = least significant bit
encoded = (MSB << 1) | LSB; //将2针的值转换为单个数字
sum = (lastEncoded << 2) | encoded; //将其添加到先前的编码值
if (sum == 0b1101 || sum == 0b0100 || sum == 0b0010 || sum == 0b1011) encoderValue ++;
if (sum == 0b1110 || sum == 0b0111 || sum == 0b0001 || sum == 0b1000) encoderValue --;
lastEncoded = encoded; //下次存储该值
}