My code is as follows:
APP_GPIOTE_INIT(4); retcode = app_gpiote_user_register(&gpioID, 0, (1 << INT_PIN_MAXIM), interrupt);
The latter function call seems to fail with retcode == NRF_ERROR_NO_MEM. When I look at the documentation, it says:
"NRF_ERROR_NO_MEM Returned if the application tries to register more users than defined when the GPIOTE module was initialized in app_gpiote_init."
What could be wrong with this? Similar code seems to work with nRF51. I am using nRF5_SDK_11.0.0-2.alpha_bc3f6a0. There's also s132 soft device running (alpha version).
EDIT: I am using freeRTOS and it looks like xCreateTask() has something to do with this. Somehow creating a task allocates gpiote channels and that is why the call fails. I debugged a bit and the code fails here:
ret_code_t nrf_drv_gpiote_in_init(nrf_drv_gpiote_pin_t pin,
nrf_drv_gpiote_in_config_t const * p_config,
nrf_drv_gpiote_evt_handler_t evt_handler)
{
ASSERT(pin < NUMBER_OF_PINS);
ret_code_t result = NRF_SUCCESS;
/* Only one GPIOTE channel can be assigned to one physical pin. */
if (pin_in_use_by_gpiote(pin))
{
result = NRF_ERROR_INVALID_STATE;
}
else
{
int8_t channel = channel_port_alloc(pin, evt_handler, p_config->hi_accuracy);
if (channel != NO_CHANNELS)
{
if (p_config->is_watcher)
{
nrf_gpio_cfg_watcher(pin);
}
else
{
nrf_gpio_cfg_input(pin,p_config->pull);
}
if (p_config->hi_accuracy)
{
nrf_gpiote_event_configure(channel, pin,p_config->sense);
}
else
{
m_cb.port_handlers_pins[channel-NUMBER_OF_GPIO_TE] |= (p_config->sense)<< SENSE_FIELD_POS;
}
}
else
{
result = NRF_ERROR_NO_MEM; // THIS IS FROM WHERE THE ERROR COMES
}
}
return result;
}
