Disable DAC Pins on Pin 25 and 26
Posted: Fri Jul 09, 2021 1:20 pm
Hi,
I have made a custom ESP32 4MB board and everything is working perfectly. However, there are two pins GPIO25 and GPIO26 which are connected to external interrupts. They are not working. Later I removed all connections and found that these two pins are DAC pins and by default they output ~2v. I am using Arduino environment.
Can someone please suggest how to disable DAC and convert them to GPIO? Below is a simple blink LED sketch. However, the output on the pins is always 1.9v whether the pin status is set to high or low.
I have made a custom ESP32 4MB board and everything is working perfectly. However, there are two pins GPIO25 and GPIO26 which are connected to external interrupts. They are not working. Later I removed all connections and found that these two pins are DAC pins and by default they output ~2v. I am using Arduino environment.
Can someone please suggest how to disable DAC and convert them to GPIO? Below is a simple blink LED sketch. However, the output on the pins is always 1.9v whether the pin status is set to high or low.
Code: Select all
#define PIN1 26
#define PIN2 25
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(PIN1, OUTPUT);
pinMode(PIN2, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(PIN1, HIGH); // turn the LED on (HIGH is the voltage level)
digitalWrite(PIN2, LOW); // turn the LED on (HIGH is the voltage level)
delay(3000); // wait for a second
digitalWrite(PIN1, LOW); // turn the LED off by making the voltage LOW
digitalWrite(PIN2, HIGH); // turn the LED on (HIGH is the voltage level)
delay(3000); // wait for a second
}