Vorinstallierte Firmware für diesen Workshop

/*
 * 
 * DAS IST DIE FIRMWARE, WELCHE AUF DEM D1 VORINSTALLIERT IST
 * 
 * 

DESING UND INFORMATIK BEGREIFEN 2021
F.G. 03.03.2021

Einfache Ansteck-Übungen als Warm-Up


Pin-Belegung
D1 --> SCL
D2 --> SDA
D3 --> Pushbutton
D5 --> LED (PWM)
D6 --> LED
D7 --> Interrupt für Accelerometer
A0 --> Potentiometer
D8 --> LED
3.3 --> Accelerometer
3.3 --> Potentiometer (nicht 5V!)


*/

// Accelerometer:
#include "Wire.h" 
#define MPU6050_ADDR              0x68 // Alternatively set AD0 to HIGH  --> Address = 0x69
#define MPU6050_ACCEL_CONFIG      0x1C // Accelerometer Configuration Register
#define MPU6050_PWR_MGT_1         0x6B // Power Management 1 Register
#define MPU6050_INT_PIN_CFG       0x37 // Interrupt Pin / Bypass Enable Configuration Register
#define MPU6050_INT_ENABLE        0x38 // Interrupt Enable Register
#define MPU6050_LATCH_INT_EN      0x05 // Latch Enable Bit for Interrupt 
#define MPU6050_ACTL              0x07 // Active-Low Enable Bit
#define MPU6050_WOM_EN            0x06 // Wake on Motion Enable bit
#define MPU6050_WOM_THR           0x1F // Wake on Motion Threshold Register
#define MPU6050_MOT_DUR           0x20 // Motion Detection Duration Register
#define MPU6050_ACCEL_INTEL_CTRL  0x69 // Accelaration Interrupt Control Register
#define MPU6050_SIGNAL_PATH_RESET 0x68 // Signal Path Reset Register
byte interruptPin=13;
volatile bool accEvent = false;

long timestamp = 0; // Fuer das Ein-/Ausschalten des LEDs


void setup() {
  // Accelerometer:
  Wire.begin();
  writeRegister(MPU6050_PWR_MGT_1, 0);
  setInterrupt(1); // set Wake on Motion Interrupt / Sensitivity; 1(highest sensitivity) - 255
  attachInterrupt(digitalPinToInterrupt(interruptPin), motion, RISING);

  pinMode(A0, INPUT);
  pinMode(D4, OUTPUT); // onboard LED
  pinMode(D5, OUTPUT); // LED (PWM)
  pinMode(D6, OUTPUT); // LED
  pinMode(D8, OUTPUT); // LED
  digitalWrite(D4, HIGH); // onboard LED ausschalten
  digitalWrite(D6, HIGH); // LED einschalten
  digitalWrite(D8, LOW); // LED ausschalten
  pinMode(D3, INPUT_PULLUP); // Taster

  Serial.begin(9600);
  Serial.println("boot up complete");
}

void loop() {
  Serial.println(analogRead(A0));
  analogWrite(D5, analogRead(A0)); // LED entsprechend dimmen (PWM)

  if (digitalRead(D3) == LOW) { // Taster Status auslesen
    timestamp = millis();
  }

  // Accelerometer:
  if(accEvent){
    Serial.println("motion detected");
    timestamp = millis();
    accEvent = false;
    attachInterrupt(digitalPinToInterrupt(interruptPin), motion, RISING);   
  } 
  
  checkLEDStatus(); // LED steuern
}

// Fuer die LED Steuerung
void checkLEDStatus() {
  if (millis() - timestamp < 1000) {
    digitalWrite(D4, LOW); // onboard LED einschalten
    digitalWrite(D8, HIGH); // LED einschalten
  } else {
    digitalWrite(D4, HIGH); // onboard LED ausschalten
    digitalWrite(D8, LOW); // LED ausschalten
  }
}

// Accelerometer:
void setInterrupt(byte threshold){
//writeRegister(MPU6050_SIGNAL_PATH_RESET, 0b00000111);  // not(?) needed
//writeRegister(MPU6050_INT_PIN_CFG, 1<<MPU6050_ACTL); // 1<<MPU6050_LATCH_INT_EN
  writeRegister(MPU6050_ACCEL_CONFIG, 0b00000001);
  writeRegister(MPU6050_WOM_THR, threshold); 
  writeRegister(MPU6050_MOT_DUR, 0b00000001);  // set duration (LSB = 1 ms)
//writeRegister(MPU6050_ACCEL_INTEL_CTRL, 0x15);  // not needed (?)
  writeRegister(MPU6050_INT_ENABLE, 1<<MPU6050_WOM_EN);
}
void writeRegister(uint16_t reg, byte value){
  Wire.beginTransmission(MPU6050_ADDR);
  Wire.write(reg);
  Wire.write(value);
  Wire.endTransmission();
}
void motion(){
  accEvent = true;
  detachInterrupt(interruptPin);
}