Not able to generate clock using hardware timer in esp32

[mega-29]

#include <Arduino.h>
#include <esp32/rom/ets_sys.h>
#include <esp_timer.h>

const int switchPin = 34;  // GPIO pin where the switch is connected
const int pulsePin = 18;  // GPIO pin where the clock pulse output will be sent
volatile bool pulseEnabled = false;  // Flag to track whether pulse generation is enabled

esp_timer_handle_t timer_handle;  // Handle for the hardware timer

portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;  // Mutex for timer ISR access
void IRAM_ATTR timer_callback(void* arg) {
    // Toggle the pulse pin state
    digitalWrite(pulsePin, !digitalRead(pulsePin));
}
void setup() {
    pinMode(switchPin, INPUT_PULLUP);  // Enable internal pull-up resistor for the switch
    pinMode(pulsePin, OUTPUT);
    digitalWrite(pulsePin, LOW);  // Ensure pulse pin starts low
    
    // Configure hardware timer
    const esp_timer_create_args_t timer_args = {
        .callback = &timer_callback,
        .name = "clock_timer"
    };
    ESP_ERROR_CHECK(esp_timer_create(&timer_args, &timer_handle));
}
void IRAM_ATTR switch_isr() {
    portENTER_CRITICAL_ISR(&timerMux);
    
    if (digitalRead(switchPin) == LOW) {  // Switch pressed
        if (!pulseEnabled) {
            ESP_ERROR_CHECK(esp_timer_start_periodic(timer_handle, 1000000));  // Start timer, 1ms period
            pulseEnabled = true;
        }
    } else {  // Switch released
        if (pulseEnabled) {
            ESP_ERROR_CHECK(esp_timer_stop(timer_handle));  // Stop the timer
            digitalWrite(pulsePin, LOW);  // Ensure pulse pin is low
            pulseEnabled = false;
        }
    }
    
    portEXIT_CRITICAL_ISR(&timerMux);
}
void loop() {
    attachInterrupt(digitalPinToInterrupt(switchPin), switch_isr, CHANGE);
    delay(100);  // Delay to avoid bouncing
}

not able to generate clock using hardware timer in esp32

[b707]

Is this the same as

NOT able to generate clock pulse

#include <Arduino.h> #include <esp32-hal-timer.h> // Pin definitions const int buttonPin = 34; // Pin connected to the button const int clockPin = 18; // Pin connected to the clock output // Timer variables hw_timer_t * timer = NULL; portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED; volatile bool clockRunning = false; // Interrupt service routine for the timer void IRAM_ATTR onTimer() { digitalWrite(clockPin, !digitalRead(clockPin)); // Toggle clock pin state } // Interrupt servi…

and this

Clock pulse with button interrupt

#include <Arduino.h> #include <esp32-hal-timer.h> // Define the LED pin const int ledPin = 18; // Define the button pin const int buttonPin = 34; volatile bool button = false; // Define the timer frequency (10 MHz) //const int timerFrequency = 10000000; // Define the timer period (50% duty cycle, 1 Hz) //const int timerPeriod = timerFrequency / 2; // Create a timer object hw_timer_t * timer = NULL; // Flag to indicate whether the LED is currently blinking //bool ledBlinking = true; void IR…

and continuation of this:

Hardware Timer ESP32 Dev Module

#include <Arduino.h> #include <esp32-hal-timer.h> hw_timer_t *timer = NULL; const int ledPin = 2; void IRAM_ATTR onTimer() { // Toggle LED state digitalWrite(ledPin, !digitalRead(ledPin)); } void setup() { pinMode(ledPin, OUTPUT); // Initialize timer 0 with a frequency of 1 Hz timer = timerBegin(0, 1); // Attach an ISR function to the timer timerAttachInterrupt(timer, &onTimer, true); // Set an alarm to trigger after 1 second timerAlarmWrite(timer, 1000000, true); // 10…

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