hi, i am going to make a simple PWM with SDK 6.0.0, nrf51822 and softdevice.
first, i use ble_app_uart example as a base code, because i need to BLE communication with high frequency.
here is my simple code
/**@brief Application main function. */ int main(void) {
// Initialize
leds_init();
timers_init();
buttons_init();
// uart_init(); ble_stack_init(); gap_params_init(); services_init(); advertising_init(); conn_params_init(); sec_params_init();
nrf_gpio_cfg_output(22);
nrf_gpio_cfg_output(21);
//NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
NRF_CLOCK->TASKS_HFCLKSTART;
//Wait for external oscillator to start up
NRF_TIMER2->PRESCALER = 2;
NRF_TIMER2->TASKS_CLEAR;
NRF_TIMER2->BITMODE = TIMER_BITMODE_BITMODE_16Bit;
NRF_TIMER2->MODE = TIMER_MODE_MODE_Timer;
NRF_TIMER2->EVENTS_COMPARE[0] = 0;
NRF_TIMER2->CC[0] = 500;
NRF_TIMER2->CC[1] = 100;
NRF_TIMER2->CC[2] = 600;
NRF_TIMER2->CC[3] = 700;
NRF_TIMER2->SHORTS = (TIMER_SHORTS_COMPARE0_CLEAR_Enabled <<TIMER_SHORTS_COMPARE0_CLEAR_Pos);
NRF_TIMER2->INTENSET = (TIMER_INTENSET_COMPARE0_Enabled << TIMER_INTENSET_COMPARE0_Pos);
NVIC_EnableIRQ(TIMER2_IRQn);
//NRF_POWER->TASKS_CONSTLAT = 1;
NRF_TIMER2->TASKS_START = 1;
nrf_gpiote_task_config(0, 21, NRF_GPIOTE_POLARITY_TOGGLE, NRF_GPIOTE_INITIAL_VALUE_LOW);//GPIOTASK 설정
NVIC_EnableIRQ(GPIOTE_IRQn);
NRF_PPI->CH[0].EEP = (uint32_t)&NRF_TIMER2->EVENTS_COMPARE[1];//event end point: task 발생 조건
NRF_PPI->CH[0].TEP = (uint32_t)&NRF_GPIOTE->TASKS_OUT[0];//task end point, event에 의해 발생하는 task
NRF_PPI->CHEN = PPI_CHEN_CH0_Enabled << PPI_CHEN_CH0_Pos;
// simple_uart_putstring(START_STRING);
advertising_start();
// Enter main loop
for (;;)
{
//power_manage();
}
}
void TIMER2_IRQHandler(void) { if ((NRF_TIMER2->EVENTS_COMPARE[0] == 1) && (NRF_TIMER2->INTENSET & TIMER_INTENSET_COMPARE0_Msk)) { NRF_TIMER2->EVENTS_COMPARE[0] = 0; }
//NRF_TIMER2->TASKS_CLEAR;
nrf_gpio_pin_toggle(22);
}
/**
- @} */
the BLE connection is operated well with BLE toolbox. and the timer2 compare interrupt is called well.
the problem is occurred in these sentences
NRF_PPI->CH[0].EEP = (uint32_t)&NRF_TIMER2->EVENTS_COMPARE[1]; NRF_PPI->CH[0].TEP = (uint32_t)&NRF_GPIOTE->TASKS_OUT[0];
with this two code lines, the chip do not operate anythings. if i delete this two code lines, the chip operates well.
is there any interference between the codes and other things???
