Workflow

Start FREQM measurement and wait until measure done then read result data.

freqm_start_measure(&freqm_instance);
while ((status = freqm_get_result_value(&freqm_instance, &measure_result))
        == FREQM_STATUS_MEASURE_BUSY) {
};

The board LED is on to indicate a measurement data is read.

case FREQM_STATUS_MEASURE_DONE:
    LED_On(LED_0_PIN);
    while (true) {
    }

The board LED is toggle to indicate measurement is overflow.

case FREQM_STATUS_CNT_OVERFLOW:
    freqm_clear_overflow(&freqm_instance);
    while (true) {
        LED_Toggle(LED_0_PIN);
        volatile uint32_t delay = 50000;
        while(delay--) {
        }
    }