PWM driving of a DC/DC Converter with Arduino nano

Projects Programming
10

Thank you very much!

I corrected my code thanks to your help. It looks like this, now, and seems to work properly (I haven't tested very extensively yet)

 #include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>


const int ModeSwitchHigh = 2;
const int ModeSwitchLow = 3;
const int HighSideMos = 9;
const int LowSideMos = 10;
volatile boolean IsCharging = true;  //True -> Buck converter mode, using only High-side Mosfet. False -> Boost converter mode, using only Low-Side Mosfet
volatile boolean TimerSet = false;
volatile int CompareValueHigh = 40;
volatile int CompareValueLow = 40;


void setup() {
 pinMode(ModeSwitchHigh,INPUT_PULLUP);
 pinMode(ModeSwitchLow,INPUT_PULLUP);
 pinMode(HighSideMos, OUTPUT);
 pinMode(LowSideMos, OUTPUT);

attachInterrupt(digitalPinToInterrupt(ModeSwitchHigh), Buckmode, FALLING);    //Buckconverter mode, Battery loading, High-Side Mosfet
attachInterrupt(digitalPinToInterrupt(ModeSwitchLow), Boostmode, FALLING);    //Boostconverter mode, Battery unloading, Low-Side Mosfet 


  //InitTimer1
  TCNT1  = 0;
  TCCR1A = 0; 
  TCCR1B = 0; 
  
  // set to mode 14 fast pwm.
  // TCCR1B
 // Bit                 7      6      5       4     3      2      1      0
 // Bit Name          COM1A1 COM1A0 COM1B1 COM1B0 -----  ----- WGM11  WGM10
 // Initial Value       0      0      0       0     0      0      0      0
 // changed to          1      0      1       0     0      0      1      0

 TCCR1A = B10100010;      
   
 // TCCR1B
 // Bit             7     6      5       4       3      2        1       0
 // Bit Name      ICNC1  ICES1 ----   WGM13    WGM12    CS12    CS11     CS10
 // Initial Value    0     0     0        0       0      0        0       0
 // changed to       0     0     0       1       1      0        0       1
 
 TCCR1B = B00011001;
  
  ICR1 = 159;   //Set Top Value, -> frequenz 100 kHz 16 MHz/100kHz-1, 16 MHz internal clock
  OCR1A = 50; // init Wert 5 mikro sek
  OCR1B = 50;  
 }

void loop() {
//Buckmode  
  if ((IsCharging == true)&&(TimerSet==false)) {
    // Here Pin 10 stoppen, Pin 9 enable   
   TCCR1A &= ~(1 << COM1B1);
  TCCR1A |= (1 << COM1A1);
  OCR1A = 20; 
  TimerSet=true;
}
  //Boostmode
  else if ((IsCharging == false)&&(TimerSet==false)){
   TCCR1A &= ~(1 << COM1A1);
     TCCR1A |= (1 << COM1B1);
    OCR1B = 20; 
    TimerSet = true;
  }
}

void Buckmode(){
  IsCharging = true;
  TimerSet = false;
 // PINB = (1 << PINB1); //toggle pin9
  
}

void Boostmode(){
  IsCharging = false;
  TimerSet = false;
}