Timer interrupts

[aabb]

I'm using RFduino that utilizes nRF51822. I need to set a timer1 as timer0 is used by the BLE stack, so I used the following code:

#define TRIGGER_INTERVAL 1000      // ms

void timer_config(void)
{
  NRF_TIMER1->TASKS_STOP = 1;	// Stop timer
  NRF_TIMER1->MODE = TIMER_MODE_MODE_Timer;  // taken from Nordic dev zone
  NRF_TIMER1->BITMODE = (TIMER_BITMODE_BITMODE_24Bit << TIMER_BITMODE_BITMODE_Pos);
  NRF_TIMER1->PRESCALER = 4;	// 1us resolution
  NRF_TIMER1->TASKS_CLEAR = 1; // Clear timer
  NRF_TIMER1->CC[0] = TRIGGER_INTERVAL * 1000; 
  NRF_TIMER1->INTENSET = TIMER_INTENSET_COMPARE0_Enabled << TIMER_INTENSET_COMPARE0_Pos;  // taken from Nordic dev zone
  NRF_TIMER1->SHORTS = (TIMER_SHORTS_COMPARE0_CLEAR_Enabled << TIMER_SHORTS_COMPARE0_CLEAR_Pos);
  attachInterrupt(TIMER1_IRQn, TIMER1_Interrupt);    // also used in variant.cpp to configure the RTC1 
  NRF_TIMER1->TASKS_START = 1;	// Start TIMER
}

void setup() {
  Serial.begin(115200);
  
  timer_config();
}

void loop() {
  while(1);
}

void TIMER1_Interrupt(void)
{
  if (NRF_TIMER1->EVENTS_COMPARE[0] != 0)
  {
    Serial.println("Timer interrupt called");

    NRF_TIMER1->EVENTS_COMPARE[0] = 0;
  }
}

Unfortunately it doesn't work. If a replace "TIMER1" with "TIMER0" it works fine. I'm a newbie regarding interrupts, any suggestions ? Thanks

[karthik999]

//#define TRIGGER_INTERVAL 100 // ms
int LED = 8;
//int LED1 = 7;
int i = 0;
void timer_config(void)
{
NRF_TIMER0->TASKS_STOP = 1; // Stop timer
NRF_TIMER0->MODE = TIMER_MODE_MODE_Timer; // taken from Nordic dev zone
NRF_TIMER0->BITMODE = (TIMER_BITMODE_BITMODE_24Bit << TIMER_BITMODE_BITMODE_Pos);
NRF_TIMER0->PRESCALER = 8; // 1us resolution
NRF_TIMER0->TASKS_CLEAR = 1; // Clear timer
NRF_TIMER0->CC[0] = 62500;
NRF_TIMER0->INTENSET = TIMER_INTENSET_COMPARE0_Enabled << TIMER_INTENSET_COMPARE0_Pos; // taken from Nordic dev zone
NRF_TIMER0->SHORTS = (TIMER_SHORTS_COMPARE0_CLEAR_Enabled << TIMER_SHORTS_COMPARE0_CLEAR_Pos);
//attachInterrupt(TIMER1_IRQn, TIMER1_Interrupt); // also used in variant.cpp to configure the RTC1
NVIC_EnableIRQ(TIMER0_IRQn);
NRF_TIMER0->TASKS_START = 1; // Start TIMER
// digitalWrite(LED, HIGH);
// delay(3000);
//
}

void setup() {
Serial.begin(115200);
pinMode(LED,OUTPUT);
digitalWrite(LED, LOW);
delay(3000);
timer_config();
}

void loop() {
// digitalWrite(LED, LOW);
// delay(1000);
// digitalWrite(LED, HIGH);
// delay(1000);
// //digitalWrite(LED, HIGH);
// //digitalWrite(LED, HIGH);

//while(1);
}

void TIMER0_IRQHandler()
{
// digitalWrite(LED, LOW);
// delay(1000);
// digitalWrite(LED, HIGH);
// delay(1000);
if (NRF_TIMER0->EVENTS_COMPARE[0] != 0)
{
//Serial.println("Timer interrupt called");
NRF_TIMER0->EVENTS_COMPARE[0] = 0;
int i = i+1;
if(i%2 == 0)
{
digitalWrite(LED, LOW);
delay(1000);
}
else
{
digitalWrite(LED, HIGH );
delay(1000);
}

}
}

Hey this is my code for blinking an led using timer interrupt on nrf 52832board, there are no errors in the code but the code is not working as desired. The function TIMER_IRQHandler is not called during an interrupt.

can someone please help me to tackle this problem?