Hi,
I'm trying to use a GPIO interrupt and a semaphore to trigger a free rtos taskm but whenever I run xSemaphoreTake i get a hard fault error.
// Semaphore to signal interrupt pin change
SemaphoreHandle_t m_ppg_semaphore;
static void ppg_test_task(void *pvParameter){
UNUSED_PARAMETER(pvParameter);
m_ppg_semaphore = xSemaphoreCreateBinary();
ASSERT(NULL != m_ppg_semaphore);
gpio_init();
//volatile enum ppgInterupt ppgState = notReady;
// Read the interrupt registers to clear them
//uint8_t buffer;
//bool stay = false;
while (true) {
bool temp = xSemaphoreTake(m_ppg_semaphore, portMAX_DELAY);
// Turn an LED on to signify the start of data reading
bsp_board_led_invert(BSP_BOARD_LED_3);
}
}
void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
BaseType_t yield_req = pdFALSE;
/* The returned value may be safely ignored, if error is returned it only means that
* the semaphore is already given (raised). */
UNUSED_VARIABLE(xSemaphoreGiveFromISR(m_ppg_semaphore, &yield_req));
portYIELD_FROM_ISR(yield_req);
}
/**
* @brief Function for configuring: PIN_IN pin for input, PIN_OUT pin for output,
* and configures GPIOTE to give an interrupt on pin change.
*/
static void gpio_init(void) {
ret_code_t err_code;
err_code = nrf_drv_gpiote_init();
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_HITOLO(true);
in_config.pull = NRF_GPIO_PIN_PULLUP;
err_code = nrf_drv_gpiote_in_init(INT_IN, &in_config, in_pin_handler);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_event_enable(INT_IN, true);
NRF_LOG_INFO("GPIO Configured");
}
