9.2.1.3 Workflow

Create an FREQM device instance struct, which will be associated with an FREQM peripheral hardware instance.

static struct freqm_module freqm_instance;

Create a new function configure_freqm(), which will be used to configure the overall FREQM peripheral.

void configure_freqm(void)

Create an FREQM peripheral configuration structure that will be filled out to set the module configuration.

struct freqm_config config_freqm;

Fill the FREQM peripheral configuration structure with the default module configuration values.

freqm_get_config_defaults(&config_freqm);
config_freqm.ref_clock_circles = 255;

Initialize the FREQM peripheral and associate it with the software instance structure that was defined previously.

freqm_init(&freqm_instance, FREQM, &config_freqm);

Create a new callback function.

void freqm_complete_callback(void)
{
    freqm_read_done = true;
}

Create a callback status software flag.

bool volatile freqm_read_done = false;

Let the callback function set the flag to true when read job done.

freqm_read_done = true;

Create a new function configure_freqm_callback(), which will be used to configure the callbacks.

void configure_freqm_callback(void)
{
    freqm_register_callback(&freqm_instance, freqm_complete_callback,
            FREQM_CALLBACK_MEASURE_DONE);
    freqm_enable_callback(&freqm_instance, FREQM_CALLBACK_MEASURE_DONE);
}

Register callback function.

freqm_register_callback(&freqm_instance, freqm_complete_callback,
        FREQM_CALLBACK_MEASURE_DONE);

Enable the callbacks.

freqm_enable_callback(&freqm_instance, FREQM_CALLBACK_MEASURE_DONE);

Enable the now initialized FREQM peripheral.

freqm_enable(&freqm_instance);