I am using LSM9DS1 IMU, nRF52840 with SDK v16.0.0. I configured the IMU to raise an interrupt when the FIFO buffer be full by writing to register INT2_CTRL the value '0b00011000', I read the register to check if the configuration was written correctly and it was. Pin INT2_A/G of IMU is connected to P0.11.
Below, the GPIOTE configurations.
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#define INT_PIN 11
/* GPIO congifuration */
nrfx_gpiote_in_config_t int_pin_config = {
.sense = NRF_GPIOTE_POLARITY_HITOLO,
.pull = NRF_GPIO_PIN_PULLUP,
.is_watcher = false,
.hi_accuracy = true,
.skip_gpio_setup = false,
};
nrfx_err_t err_code = nrfx_gpiote_in_init(INT_PIN, &int_pin_config, gpio_handler); //Initialize GPIO interrupt
nrfx_gpiote_in_event_enable(INT_PIN, true);
Below, the GPIOTE event handler.
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void gpio_handler(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action){
if(action == NRF_GPIOTE_POLARITY_HITOLO){
tx_buff[0] = OUT_X_L_G;
//Read data when the interrup occurs
lsm9ds1_read_data(tx_buff, TX_BUFF_SIZE, rx_buff, RX_BUFF_SIZE);
}
}
I set a checkpoint in the handler but it never enters. When I check the FIFO_SRC register, FTH and OVRN bits are set to 1 so I am assuming that the interrup in actually raised.
Any ideas of why it does not enter in the handler?
PS: I have tried all possible combinations of sense and pull in the configurarion and the result is the same.
