Hello Everyone,
I newbie to BLE world and new to programming. Currently I am following this github repo: https://github.com/sandeepmistry/arduino-BLEPeripheral . I am using nrf51822, S130 SDK11 with arduino 1.8.1.
I am trying to write data (battery data) and toggle led at set interval using timer 2.
I am using BLESerial example code to write data.
When the timer times out, the BLE kind of crashes and doesn't respond
However, if I disable "BLESerial.write(data);" , the led toggles properly and program runs correctly.
Somehow, the BLESerial call is causing problem. Is it something that BLESerial function calls and TIMER2 are inter-related?
I checked the product specification which mentions TIMER0 is used by softdevice and there is no dependency on TIMER2. Can someone help me out for this issue?
Timer code:
void ms_timer_init(void)
{
NRF_TIMER2->TASKS_STOP = 1; // Stop timer, if it was running
NRF_TIMER2->TASKS_CLEAR = 1;
NRF_TIMER2->MODE = TIMER_MODE_MODE_Timer; // Timer mode (not counter)
NRF_TIMER2->EVENTS_COMPARE[0] = 0; // clean up possible old events
NRF_TIMER2->EVENTS_COMPARE[1] = 0;
NRF_TIMER2->EVENTS_COMPARE[2] = 0;
NRF_TIMER2->EVENTS_COMPARE[3] = 0;
// Timer is polled, but enable the compare0 interrupt in order to wakeup from CPU sleep
NRF_TIMER2->INTENSET = TIMER_INTENSET_COMPARE0_Msk;
NRF_TIMER2->SHORTS = 1 << TIMER_SHORTS_COMPARE0_CLEAR_Pos; // Clear the count every time timer reaches the CCREG0 count
NRF_TIMER2->PRESCALER = 9; // Input clock is 16MHz, timer clock = 2 ^ prescale -> interval 1us
NRF_TIMER2->CC[0] = 32; // 625uS with 1MHz clock to the timer
NVIC_EnableIRQ(TIMER2_IRQn);
NRF_TIMER2->TASKS_START = 1;
}
// Start the timer - it will be running continuously}
/** TIMTER2 peripheral interrupt handler. This interrupt handler is called whenever there it a TIMER2 interrupt*/
void TIMER2_IRQHandler(void)
{
if ((NRF_TIMER2->EVENTS_COMPARE[0] != 0) && ((NRF_TIMER2->INTENSET & TIMER_INTENSET_COMPARE0_Msk) != 0))
{
NRF_TIMER2->EVENTS_COMPARE[0] = 0; //Clear compare register 0 event
BLESerial.write(data);
digitalWrite(LED, !(digitalRead(LED)));
}
}
