Power Electronics Laboratory – Buck/Boost/Buck-Boost Converters

Arduino Code

#include <PWM.h> // Include PWM Library
#include <TM1637Display.h> // Include TM1637 Display Libray

// Declare Setting
float D=0; // Duty Cycle
float Dmin = 10; // Minimum Duty Cycle (%)
float Dmax = 65; // Maximum Duty Cycle (%) (DO NOT MORE THAN 0.8 FOR BOOST)
int Rleft= 930; // Left Input Sense Receive at ADC (0-255 depend on resistance)
int32_t Fs = 70000; // Switching Frequency (in Hz)
int Dout; // Duty Cycle (0-255)
int R=0; // ADC Input (0-255)

// Declare Input Output
int dPin = A0; // Duty Cycle Pin
int pwmPin = 10; // PWM Pin
#define CLK 3 // Define CLK pin for TM1637 Display
#define DIO 2 // Define DIO pin for TM1637 Display
TM1637Display display(CLK, DIO); // Create TM1637 Display Class

void setup() {
//initialize all timers except for 0, to save time keeping functions
InitTimersSafe();
//sets the frequency for the specified pin
bool success = SetPinFrequencySafe(pwmPin, Fs);
//if the pin frequency was set successfully, turn pin 13 on
if(success) {
pinMode(13, OUTPUT);
digitalWrite(13, HIGH);
}

pinMode(dPin,INPUT); // Declare dPin as input
Serial.begin(9600); // Declare display parameter in PC
display.setBrightness(0x0f); // Set the display brightnes
}

void loop() {
R=analogRead(dPin); // Read ADC
if (R>=Rleft){ // Limit ADC Input
R=Rleft;
}
if (R<=0){
R=0;
}

D=(Dmin-Dmax)/Rleft*R+Dmax; // Calculate actual D based on ADC
Dout = D/100*255; // Convert D into 8 Bit Format (0-255)
pwmWrite(pwmPin, Dout); // D change from 0 to 255
Serial.println(R); // Print in PC
Serial.println(D); // Print in PC
Serial.println(Dout); // Print in PC
display.clear(); // Clear TM1637 Display
display.showNumberDec(D, false); // Print D to Tm1637 Display
delay(500); // Add delay to avoid noise problem
}