آموزش راه اندازی ماژول PCF8591 (مبدل آنالوگ به دیجیتال و دیجیتال به آنالوگ) با آردوینو

/*
  modified on Sep 23, 2020
  Modified by MohammedDamirchi from https://github.com/adafruit/Adafruit_PCF8591
  
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*/



#include <Adafruit_PCF8591.h>
// Make sure that this is set to the value in volts of VCC
#define ADC_REFERENCE_VOLTAGE 5.0
Adafruit_PCF8591 pcf = Adafruit_PCF8591();

void setup() {
  Serial.begin(115200);
  while (!Serial)
    delay(10);

  Serial.println("# Adafruit PCF8591 demo");
  if (!pcf.begin()) {
    Serial.println("# Adafruit PCF8591 not found!");
    while (1)
      delay(10);
  }
  Serial.println("# Adafruit PCF8591 found");
  pcf.enableDAC(true);


}

uint8_t dac_counter = 0;

void loop() {
  // Make a triangle wave on the DAC output
  pcf.analogWrite(dac_counter);
  dac_counter = dac_counter + 10;
  Serial.print("AIN0: ");
  Serial.print(int_to_volts(pcf.analogRead(0), 8, ADC_REFERENCE_VOLTAGE));
  Serial.print("\t AIN1: ");
  Serial.print(int_to_volts(pcf.analogRead(1), 8, ADC_REFERENCE_VOLTAGE));
  Serial.print("\t AIN2: ");
  Serial.print(int_to_volts(pcf.analogRead(2), 8, ADC_REFERENCE_VOLTAGE));
  Serial.print("\t AIN3: ");
  Serial.print(int_to_volts(pcf.analogRead(3), 8, ADC_REFERENCE_VOLTAGE));

  Serial.println("");
  delay(3);
}
float int_to_volts(uint16_t dac_value, uint8_t bits, float logic_level) {
  return (((float)dac_value / ((1 << bits) - 1)) * logic_level);
}