ESP32 Forum

Code: Select all

gpio_install_isr_service(0); // Install the ISR service.
gpio_isr_handler_add(pixelClockPin, myHandler, NULL);
gpio_intr_enable(pixelClockPin);

Code: Select all

while(1) {
   vTaskDelay(1000/portTICK_PERIOD_MS);
   ESP_LOGD(tag, "Value of counter: %d", pclkCounter);
}

Code: Select all

static void IRAM_ATTR myHandler(void* arg) {
   pclkCounter++;
}

Code: Select all

// TEST OF EXTERNAL INTERRUPTS 
// ESP32 DEVKIT - ARDUINO IDE 1.8.5
// Gustavo Murta 18/02/2018

int GPIO4 = 4;      // SCOPE CH 1   
int GPIO5 = 5;      // SCOPE CH 2  

void setup()
{
  pinMode (GPIO4, INPUT);                 // Interrupt PIN - ESP32 GPIO_4
  pinMode (GPIO5, OUTPUT);                // Scope PIN - ESP32 GPIO_5

  // Generating 8 MHz Pulses - For test, attach GPIO_2 to GPIO_4
  pinMode(2, OUTPUT);                     // GPIO_2 as Output
  ledcAttachPin(2, 0);                    // GPIO_2 attached to PWM Channel 0
  ledcSetup(0, 8000000, 2);               // Channel 0 , freq 8 MHz , 2 bit resolution
  ledcWrite(0, 2);                        // Enable frequency with duty cycle 50%

  attachInterrupt(digitalPinToInterrupt(GPIO4), PrintData, RISING);
  
  Serial.begin(115200);
  Serial.println(" Monitoring Interrupts ");
}

void setGPIO_5 ()
{
  digitalWrite(GPIO5, LOW);        // Monitor GPIO_5 with SCOPE CH 2 
  digitalWrite(GPIO5, HIGH);
  //delayMicroseconds(1);          // change nothing
  digitalWrite(GPIO5, LOW);
}

void PrintData ()
{
  //Serial.println(" An interrupt has occurred. "); // For slow tests 
  setGPIO_5 ();
}

void loop()
{
}