// SET your Board to MiniCore ATmega328 @ 8Mhz Internal
#include <Arduino.h>
#define Xalert 2
#define I2C_ADDR 0x10
#include <I2C_8Bit.h>

int DATA_REGISTER_ADDR =0;
int ENABLED_FLAG_POS = 0;
int in = 0;

int LED_HIGH = 11;
int LED_MID  = 12;
int LED_LOW  = 13;
int LED_BLAU = PB6;   // PORTB = PORTB | 0b01000000;
int LED_ROT  = PB7;   // oder: PORTB |= 0b10000000; oder: PORTB |= (1<<PB7)
int POWER = 6;  // 12V for FETs
int VAC = 9;    // Main motor for vaccuum PWM (max18V)
int BRUSH = 10 ; // Motorbürste
int ECO = 3;    // on Stufe 1
int NORM = 4;   // on Stufe 2
int TURBO = 5;  // on Stufe 3
int PRESSURE = 8; // Differenzdruckschalter
int BQWRITE = 16;  // BQ write (enable = HIGH)


void setup() {
  Serial.begin(9600);
  Serial.println("Hallöchen zu Bosch BCH6L2560_Test.ino  !");
  DDRB = 0b11111110;  //rot,blau,low,mid,high,Bürste,Vacc,diffdruck
  DDRC = 0b00100100;  //Vout,rst,SCK,SDA,Iout,EEprom,tmp,tmp
  DDRD = 0b00111101;  //nc,12V,turbo,high,eco,xalert,tx,rx

  pinMode(ECO,INPUT);
  pinMode(NORM,INPUT);
  pinMode(TURBO,INPUT);

  pinMode(PRESSURE,INPUT_PULLUP);
//PORTB = 0b10000000;  // digitalWrite PB7 (ROT) HIGH);
//PORTB = 0b01000000;  // digitalWrite PB6 (BLAU) HIGH);
// DDRB | (1 << PB7);    // pinMode(PB7, OUTPUT);
// PORTB &= ~(1 << PB7);  // digitalWrite(PB7, HIGH);

  pinMode(BQWRITE, OUTPUT);
  digitalWrite(BQWRITE, LOW);
  Wire.begin();
  Wire.setClock(100000);
  pinMode(Xalert, INPUT);
  attachInterrupt(digitalPinToInterrupt(Xalert), interruptHandler, FALLING);
  Wire.beginTransmission(I2C_ADDR); // transmit to device (0x10)
  I2C_8Bit_writeFlag(0x10,2,6,0);  // set BQ to "stand alone mode"
}  //    ende  void setup()



void loop() {
  
 digitalWrite(POWER,1); // switch on 12v Power für FET-Ansteuerung
 if (digitalRead(TURBO)==0) {analogWrite(VAC,180);analogWrite(BRUSH,180);ltclr();}
 if (digitalRead( NORM)==0) {analogWrite(VAC,180);analogWrite(BRUSH,0);}
 if (digitalRead( ECO )==0) {analogWrite(VAC,80);analogWrite(BRUSH,0);} 
 if ((digitalRead(TURBO)==1)&&(digitalRead(NORM)==1)&&(digitalRead(ECO)==1)) {analogWrite(VAC,0); digitalWrite(BRUSH,0);}
 if (digitalRead(PRESSURE)==0) {PORTB |= (1<<PB7);}  //led red on
 else {PORTB &= ~(1<<PB7);}      // led red off


}  // ende void loop()
 

void interruptHandler() {
    PORTB |= (1<<PB6);  // blue LED on
  }   // ende void interruptHandler() {


void ltclr()  // OUTPUT_CONTROL [LTCLR]. The OCD, SCD, OV, and UV bits are unlatched
  {
   I2C_8Bit_writeFlag(0x10,1,7,0);
   delay(100); 
   I2C_8Bit_writeFlag(0x10,1,7,1);
   delay(100); 
   I2C_8Bit_writeFlag(0x10,1,7,0); 
   Serial.println("[LTCLR] unlatched !");
   PORTB &= ~(1<<PB6);      // led blue off
  }