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PWM_DynamicDutyCycle_Int.ino
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PWM_DynamicDutyCycle_Int.ino
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/****************************************************************************************************************************
PWM_DynamicDutyCycle_Int.ino
For nRF52-based boards usinghardware-based PWM with Adafruit_nRF52_Arduino core
Written by Khoi Hoang
Built by Khoi Hoang https://github.com/khoih-prog/nRF52_PWM
Licensed under MIT license
*****************************************************************************************************************************/
#define _PWM_LOGLEVEL_ 4
// Select false to use PWM
#define USING_TIMER false //true
#include "nRF52_PWM.h"
// OK for Feather_nRF52840_Express (5, 6, 9-13, 14-21/A0-A7, etc.)
// OK for ItsyBitsy_nRF52840_Express (5, 7, 9-13, 14-20/A0-A6, etc.)
#define pinToUse 5
//creates pwm instance
nRF52_PWM* PWM_Instance;
float frequency;
uint16_t dutyCycle;
char dashLine[] = "=====================================================================================";
void printPWMInfo(nRF52_PWM* PWM_Instance)
{
Serial.println(dashLine);
Serial.print("Actual data: pin = ");
Serial.print(PWM_Instance->getPin());
Serial.print(", PWM DC = ");
Serial.print(PWM_Instance->getActualDutyCycle());
Serial.print(", PWMPeriod = ");
Serial.print(PWM_Instance->getPWMPeriod());
Serial.print(", PWM Freq (Hz) = ");
Serial.println(PWM_Instance->getActualFreq(), 4);
Serial.println(dashLine);
}
void setup()
{
Serial.begin(115200);
while (!Serial && millis() < 5000);
delay(500);
Serial.print(F("\nStarting PWM_DynamicDutyCycle_Int on "));
Serial.println(BOARD_NAME);
Serial.println(NRF52_PWM_VERSION);
frequency = 1000.0f;
PWM_Instance = new nRF52_PWM(pinToUse, frequency, 0.0f);
if ( (!PWM_Instance) || !PWM_Instance->isPWMEnabled())
{
Serial.print(F("Stop here forever"));
while (true)
delay(10000);
}
Serial.println(dashLine);
}
void loop()
{
frequency = 5000.0f;
// 50% dutyCycle = (real_dutyCycle * 65536) / 100
dutyCycle = 32768;
Serial.print(F("Change PWM DutyCycle to (%) "));
Serial.println((float) dutyCycle * 100 / 65536);
PWM_Instance->setPWM_Int(pinToUse, frequency, dutyCycle);
printPWMInfo(PWM_Instance);
delay(5000);
// 20% dutyCycle = (real_dutyCycle * 65536) / 100
dutyCycle = 13107;
Serial.print(F("Change PWM DutyCycle to (%) "));
Serial.println((float) dutyCycle * 100 / 65536);
PWM_Instance->setPWM_Int(pinToUse, frequency, dutyCycle);
printPWMInfo(PWM_Instance);
delay(5000);
}