PWM --> map()

 

void setVoltage0(float voltage) {

      //VpwmValue = voltage / Vslope; // 전압값을 PWM 듀티 사이클 값으로 환산

    int dutyCycle = map(voltage, 0, 330, 0, 255); // Map duty cycle to 0-255 range

    analogWrite(5, dutyCycle); // Output PWM signal using pin 5

}

전압값 116.9V log값 1.7752V    

116.9/1.7752 = 65.851

기울기값을 이용해 map()함수에서 값을 변환해도 가능.

전압값 x 기울기 = log값 형태의 전압값

116.9 x 65.851 = 1.7752V

map(1.7752, 0, 5, 0, 255)

=====================================================

void setVoltage0(float voltage) {

  unsigned int dutyCycle = map(voltage, 0, 335, 0, 65535); // Map duty cycle to 0-65535 range

  analogWrite(5, dutyCycle); // Output PWM signal using pin 5

  Serial.print("dutyCycle: ");

  Serial.println(dutyCycle); // Print duty cycle value  

  Serial.print("number0 ");

  Serial.println(number0);

}

void setVoltage1(float voltage) {

  //int dutyCycle1 = map(voltage, 0, 615, 82, 255); // 83 // Map duty cycle to 0-255 range

  unsigned int dutyCycle1 = map(voltage, 0, 615, 20000, 65535); // 83 // Map duty cycle to 0-255 range

  analogWrite(6, dutyCycle1); // Output PWM signal using pin 5

  Serial.print("dutyCycle1 ");

  Serial.println(dutyCycle1);

}

void setVoltage2(float voltage) {

  //unsigned int dutyCycle2 = map(voltage, 0, 330, 0, 65535); // Map duty cycle to 0-65535 range

  unsigned int dutyCycle2 = map(voltage, 0, 30, 21242, 65535);

  analogWrite(7, dutyCycle2); // Output PWM signal using pin 7

  Serial.print("dutyCycle2: ");

  Serial.println(dutyCycle2); // Print duty cycle value

}

setup------------------------------ 타이머 16bit

  TCCR1A = _BV(COM1A1) | _BV(WGM11); // Fast PWM, non-inverting mode

  TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // Fast PWM, prescaler 1

  ICR1 = 0xFFFF; // Set the top value for 16-bit PWM

  // Set timer3 for 16-bit fast PWM on PWM_PIN2

  TCCR3A = _BV(COM3A1) | _BV(WGM31); // Fast PWM, non-inverting mode

  TCCR3B = _BV(WGM33) | _BV(WGM32) | _BV(CS30); // Fast PWM, prescaler 1

  ICR3 = 0xFFFF; // Set the top value for 16-bit PWM

  // Set timer4 for 16-bit fast PWM on PWM_PIN3

  TCCR4A = _BV(COM4A1) | _BV(WGM41); // Fast PWM, non-inverting mode

  TCCR4B = _BV(WGM43) | _BV(WGM42) | _BV(CS40); // Fast PWM, prescaler 1

  ICR4 = 0xFFFF; // Set the top value for 16-bit PWM