Not able to start hardware timer interrupts on XIAO-ESP32-C3

Using Arduino Programming Questions
1

Hi Community,

I am referring this repo to have blink a led using internal HW timer interrupts at various frequencies. If you run the examples on this specific board by SeeedStudio, the board seems way much further than the actual library featured ones.

Though I tweaked “ESP32_C3_TimerInterrupt.h” from the repo and made following changes:

  1. Added this line of definition.
    #define TIMER_BASE_CLK (APB_CLK_FREQ) //Frequency of the clock on the input of the timer groups
  2. Changed order of stdconfig elements to this, as there was an error regarding order not correct.
class ESP32TimerInterrupt
{
  private:

    timer_config_t stdConfig =
    {
	  .alarm_en     = TIMER_ALARM_EN,       //enable timer alarm
      .counter_en   = TIMER_START,          //starts counting counter once timer_init called
      .intr_type    = TIMER_INTR_MAX,
      .counter_dir  = TIMER_COUNT_UP,       //counts from 0 to counter value
      .auto_reload  = TIMER_AUTORELOAD_EN,  //reloads counter automatically
      
#if SOC_TIMER_GROUP_SUPPORT_XTAL
      .clk_src      = TIMER_SRC_CLK_APB,    //Use XTAL as source clock
#endif
      .divider      = TIMER_DIVIDER
    };

Now that I am able to run examples, I am not sure how to blink a led on. I am attaching the sketch alongwith.

#define TIMER_INTERRUPT_DEBUG 0
#define _TIMERINTERRUPT_LOGLEVEL_ 4

// Include the ESP32 timer interrupt library
#include "ESP32_C3_TimerInterrupt.h"

// Define the pin number for the LED
volatile SemaphoreHandle_t timerSemaphore;
portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;

volatile bool LED_PIN = 10;
volatile bool isrExecuted = false;

// Define the timer interval in milliseconds
#define TIMER_INTERVAL_MS         100
#define TIMER0_DURATION_MS        3000

// Create an ESP32Timer object for timer 0
ESP32Timer Timer0(0);

// Define ISR to toggle the LED blink.
bool IRAM_ATTR TimerHandler(void* timerNo) {
  portENTER_CRITICAL_ISR(&timerMux);
  Serial.print("ISR Callback");
  digitalWrite(LED_PIN, HIGH);
  isrExecuted = true;
  xSemaphoreGiveFromISR(timerSemaphore, NULL);
  portEXIT_CRITICAL_ISR(&timerMux);
  return true;
}


void setup() {

    // Initialize serial communication at 115200 baud rate
    Serial.begin(115200);
    // Set the LED pin as an output
    pinMode(LED_PIN, OUTPUT);
    digitalWrite(LED_PIN, LOW);

    // Wait for the serial port to connect
    while (!Serial && millis() < 5000);

    // Print startup messages to the serial
    Serial.print(F("\nStarting TimerInterruptTest on "));
    Serial.println(ARDUINO_BOARD);
    Serial.println(ESP32_C3_TIMER_INTERRUPT_VERSION);
    Serial.print(F("CPU Frequency = "));
    Serial.print(F_CPU / 1000000);
    Serial.println(F(" MHz"));

    timerSemaphore = xSemaphoreCreateBinary();

 // Initialize the Timer and attach the timer interrupt  function
  if (Timer0.attachInterruptInterval(TIMER_INTERVAL_MS * 1000, TimerHandler)) {
    Serial.println(F("Timer attached with interval:"));
    Serial.print(TIMER_INTERVAL_MS);
    Serial.println(F(" ms"));
  } else {
    Serial.println(F("Can't set Timer"));
  }

 // Start the timer initially
  Timer0.restartTimer();
}


void loop() 
{
  static unsigned long lastTimer0 = 0;
  static bool timer0Stopped = false;

	if (millis() - lastTimer0 > TIMER0_DURATION_MS)
	{
		lastTimer0 = millis();

		if (timer0Stopped)
		{
			Serial.print(F("Start ITimer0, millis() = "));
			Serial.println(millis());
			Timer0.restartTimer();
		}
		else
		{
			Serial.print(F("Stop ITimer0, millis() = "));
			Serial.println(millis());
			Timer0.stopTimer();
		}

		timer0Stopped = !timer0Stopped;
    
    Serial.print(F("ISR executed: "));
    Serial.println(isrExecuted);

	}  
}

I am not seeing ISR being executed in this sketch. The output is just as,

11:51:05.497 -> Start ITimer0, millis() = 156052
11:51:05.497 -> E (156057) timer_group: timer_start(103): HW TIMER NEVER INIT ERROR
11:51:05.497 -> ISR executed: 0
11:51:08.499 -> Stop ITimer0, millis() = 159053
11:51:08.499 -> ISR executed: 0
11:51:11.477 -> Start ITimer0, millis() = 162054
11:51:11.510 -> E (162059) timer_group: timer_start(103): HW TIMER NEVER INIT ERROR
11:51:11.510 -> ISR executed: 0
11:51:14.478 -> Stop ITimer0, millis() = 165055

E (18011) timer_group: timer_start(103): HW TIMER NEVER INIT ERROR

Not sure what kind of ISR or timer function types to start, may be I am pretty new to this. Also, I am not able to work with timerBegin(), timerAlarmWrite() etc. as my XIAO ESP32-C3 does not take in these functions.