//
// TCC Callback Configuration
static void tcc_callback_configuration(void){
// Register the address to the function that is to be used when counter overflows
tcc_register_callback(&tcc_instance, tcc_callback_function, TCC_CALLBACK_OVERFLOW);
// Enable this callback entry
tcc_enable_callback(&tcc_instance, TCC_CALLBACK_OVERFLOW);
}
/**
* \internal
* \brief Test the callback API
*
* This test tests the callback API for the TCC. The TCC uses one-shot mode.
*
* \param test Current test case.
*/
static void run_callback_test(const struct test_case *test)
{
test_assert_true(test,
tcc_init_success == true,
"TCC initialization failed, skipping test");
test_assert_true(test,
basic_functionality_test_passed == true,
"Basic functionality test failed, skipping test");
/* Setup TCC0 */
tcc_reset(&tcc_test0_module);
tcc_get_config_defaults(&tcc_test0_config, CONF_TEST_TCC0);
tcc_test0_config.counter.period = 4000;
tcc_test0_config.compare.wave_generation = TCC_WAVE_GENERATION_NORMAL_FREQ;
tcc_test0_config.compare.match[TCC_MATCH_CAPTURE_CHANNEL_0] = 3990;
tcc_init(&tcc_test0_module, CONF_TEST_TCC0, &tcc_test0_config);
/* Setup callbacks */
tcc_register_callback(&tcc_test0_module, tcc_callback_function,
TCC_CALLBACK_CHANNEL_0);
tcc_enable_callback(&tcc_test0_module, TCC_CALLBACK_CHANNEL_0);
tcc_enable(&tcc_test0_module);
while ((tcc_get_status(&tcc_test0_module) &
TCC_STATUS_COUNT_OVERFLOW) == 0) {
/* Wait for overflow of TCC1 */
}
tcc_disable(&tcc_test0_module);
tcc_clear_status(&tcc_test0_module, TCC_STATUS_COUNT_OVERFLOW);
test_assert_true(test,
callback_function_entered == 1,
"The callback has failed callback_function_entered = %d",
(int)callback_function_entered);
/* Test disable callback function */
tcc_disable_callback(&tcc_test0_module, TCC_CALLBACK_CHANNEL_0);
tcc_set_count_value(&tcc_test0_module, 0x00000000);
tcc_enable(&tcc_test0_module);
while (!(tcc_get_status(&tcc_test0_module) & TCC_STATUS_COUNT_OVERFLOW)) {
/* Wait for overflow of TC1*/
}
/* Test tcc_disable() */
tcc_disable(&tcc_test0_module);
test_assert_true(test,
callback_function_entered == 1,
"Disabling the callback has failed");
}
static void configure_tcc_callbacks(void)
{
//! [setup_register_callback]
tcc_register_callback(&tcc_instance, tcc_callback_to_toggle_led,
TCC_CALLBACK_OVERFLOW);
tcc_register_callback(&tcc_instance, tcc_callback_to_toggle_led,
TCC_CALLBACK_CHANNEL_0);
tcc_register_callback(&tcc_instance, tcc_callback_to_toggle_led,
TCC_CALLBACK_CHANNEL_1);
tcc_register_callback(&tcc_instance, tcc_callback_to_toggle_led,
TCC_CALLBACK_CHANNEL_2);
tcc_register_callback(&tcc_instance, tcc_callback_to_toggle_led,
TCC_CALLBACK_CHANNEL_3);
//! [setup_register_callback]
//! [setup_enable_callback]
tcc_enable_callback(&tcc_instance, TCC_CALLBACK_OVERFLOW);
tcc_enable_callback(&tcc_instance, TCC_CALLBACK_CHANNEL_0);
tcc_enable_callback(&tcc_instance, TCC_CALLBACK_CHANNEL_1);
tcc_enable_callback(&tcc_instance, TCC_CALLBACK_CHANNEL_2);
tcc_enable_callback(&tcc_instance, TCC_CALLBACK_CHANNEL_3);
//! [setup_enable_callback]
}
static void configure_tcc_callbacks(void)
{
//! [setup_register_callback]
tcc_register_callback(
&tcc_instance,
tcc_callback_to_change_duty_cycle,
(enum tcc_callback)(TCC_CALLBACK_CHANNEL_0 + CONF_PWM_CHANNEL));
//! [setup_register_callback]
//! [setup_enable_callback]
tcc_enable_callback(&tcc_instance,
(enum tcc_callback)(TCC_CALLBACK_CHANNEL_0 + CONF_PWM_CHANNEL));
//! [setup_enable_callback]
}
/**
* \brief Configure Timer module.
*/
static void configure_timer(void)
{
/**
* Timer period is 1s = Prescaler(256) * Period(46875) / Clock(12Mhz).
*/
struct tcc_config tcc_conf;
tcc_get_config_defaults(&tcc_conf, TCC0);
tcc_conf.counter.period = 46875 * TIMER_CB_INTERVAL;
tcc_conf.counter.clock_prescaler = TCC_CLOCK_PRESCALER_DIV256;
tcc_init(&tempTccModule, TCC0, &tcc_conf);
/* Register timer callback for the Request RSSI. */
tcc_register_callback(&tempTccModule, timer_cb, TCC_CALLBACK_CHANNEL_3);
tcc_enable(&tempTccModule);
}
void sw_timer_init(struct sw_timer_module *const module_inst, struct sw_timer_config *const config)
{
struct tcc_config tcc_conf;
struct tcc_module *tcc_module;
Tcc *hw[] = TCC_INSTS;
Assert(module_inst);
Assert(config);
Assert(config->tcc_dev < TCC_INST_NUM);
Assert(config->tcc_callback_channel < TCC_NUM_CHANNELS);
module_inst->accuracy = config->accuracy;
/* Start the TCC module. */
tcc_module = &module_inst->tcc_inst;
tcc_get_config_defaults(&tcc_conf, hw[config->tcc_dev]);
tcc_conf.counter.period = system_cpu_clock_get_hz() / (64 * 1000 / config->accuracy);
tcc_conf.counter.clock_prescaler = TCC_CLOCK_PRESCALER_DIV64;
tcc_init(tcc_module, hw[config->tcc_dev], &tcc_conf);
tcc_register_callback(tcc_module, sw_timer_tcc_callback, config->tcc_callback_channel + TCC_CALLBACK_CHANNEL_0);
tcc_enable_callback(tcc_module, config->tcc_callback_channel + TCC_CALLBACK_CHANNEL_0);
}
/**
* \internal
* \brief Test capture and compare
*
* This test uses TCC0 as a PWM generator (compare function). TCC1 will be set
* to capture the signal from TCC0 to test the capture functionality.
*
* \param test Current test case.
*/
static void run_capture_and_compare_test(const struct test_case *test)
{
test_assert_true(test,
tcc_init_success == true,
"TCC initialization failed, skipping test");
test_assert_true(test,
callback_function_entered == 1,
"The callback test has failed, skipping test");
/* Configure TCC module for PWM generation */
tcc_reset(&tcc_test0_module);
tcc_get_config_defaults(&tcc_test0_config, CONF_TEST_TCC0);
tcc_test0_config.counter.period = 0x03FF;
tcc_test0_config.compare.wave_generation =
TCC_WAVE_GENERATION_SINGLE_SLOPE_PWM;
tcc_test0_config.compare.match[TCC_MATCH_CAPTURE_CHANNEL_0] = 0x01FF;
/* Calculate the theoretical PWM frequency & duty */
uint32_t frequency_output, duty_output;
frequency_output = system_clock_source_get_hz(SYSTEM_CLOCK_SOURCE_OSC8M) / (0x03FF+1);
/* This value is depend on the WaveGeneration Mode */
duty_output = (uint32_t)(tcc_test0_config.compare.match[TCC_MATCH_CAPTURE_CHANNEL_0] * 100) /
tcc_test0_config.counter.period;
tcc_test0_config.pins.enable_wave_out_pin[TCC_MATCH_CAPTURE_CHANNEL_0] = true;
tcc_test0_config.pins.wave_out_pin[TCC_MATCH_CAPTURE_CHANNEL_0] = CONF_TEST_PIN_OUT;
tcc_test0_config.pins.wave_out_pin_mux[TCC_MATCH_CAPTURE_CHANNEL_0] = CONF_TEST_PIN_MUX;
tcc_init(&tcc_test0_module, CONF_TEST_TCC0, &tcc_test0_config);
tcc_register_callback(&tcc_test0_module, tcc_callback_function, TCC_CALLBACK_CHANNEL_0);
tcc_enable_callback(&tcc_test0_module, TCC_CALLBACK_CHANNEL_0);
/* Configure TCC module for capture */
tcc_reset(&tcc_test1_module);
tcc_get_config_defaults(&tcc_test1_config, CONF_TEST_TCC1);
tcc_test1_config.counter.period = 0xFFFF;
tcc_test1_config.counter.clock_prescaler = TCC_CLOCK_PRESCALER_DIV1;
tcc_test1_config.capture.channel_function[CONF_CAPTURE_CHAN_0] = TCC_CHANNEL_FUNCTION_CAPTURE;
tcc_test1_config.capture.channel_function[CONF_CAPTURE_CHAN_1] = TCC_CHANNEL_FUNCTION_CAPTURE;
tcc_init(&tcc_test1_module, CONF_TEST_TCC1, &tcc_test1_config);
struct tcc_events tcc_events = {
.on_input_event_perform_action[1] = true,
.input_config[1].modify_action = true,
.input_config[1].action = TCC_EVENT_ACTION_PERIOD_PULSE_WIDTH_CAPTURE
};
tcc_enable_events(&tcc_test1_module, &tcc_events);
/* Configure external interrupt controller */
struct extint_chan_conf extint_chan_config;
extint_chan_config.gpio_pin = CONF_EIC_PIN;
extint_chan_config.gpio_pin_mux = CONF_EIC_MUX;
extint_chan_config.gpio_pin_pull = EXTINT_PULL_UP;
extint_chan_config.wake_if_sleeping = false;
extint_chan_config.filter_input_signal = false;
extint_chan_config.detection_criteria = EXTINT_DETECT_HIGH;
extint_chan_set_config(CONF_EIC_CHAN, &extint_chan_config);
/* Configure external interrupt module to be event generator */
struct extint_events extint_event_conf;
extint_event_conf.generate_event_on_detect[CONF_EIC_CHAN] = true;
extint_enable_events(&extint_event_conf);
/* Configure event system */
struct events_resource event_res;
/* Configure channel */
struct events_config config;
events_get_config_defaults(&config);
config.generator = CONF_EVENT_GENERATOR_ID;
config.edge_detect = EVENTS_EDGE_DETECT_NONE;
config.path = EVENTS_PATH_ASYNCHRONOUS;
events_allocate(&event_res, &config);
/* Configure user */
events_attach_user(&event_res, CONF_EVENT_USED_ID);
/* Enable TCC modules */
tcc_enable(&tcc_test1_module);
tcc_enable(&tcc_test0_module);
uint16_t period_after_capture = 0;
uint16_t pulse_width_after_capture = 0;
uint32_t capture_frequency = 0;
uint32_t capture_duty = 0;
while (callback_function_entered < 4) {
period_after_capture = tcc_get_capture_value(&tcc_test1_module,
TCC_MATCH_CAPTURE_CHANNEL_0);
pulse_width_after_capture = tcc_get_capture_value(&tcc_test1_module,
TCC_MATCH_CAPTURE_CHANNEL_1);
}
if(period_after_capture != 0) {
capture_frequency =
system_clock_source_get_hz(SYSTEM_CLOCK_SOURCE_OSC8M) /
period_after_capture;
capture_duty = (uint32_t)(pulse_width_after_capture) * 100 /
period_after_capture;
}
test_assert_true(test,
(capture_frequency <= (frequency_output * (100 + CONF_TEST_TOLERANCE) / 100)) && \
(capture_frequency >= (frequency_output * (100 - CONF_TEST_TOLERANCE) / 100)) && \
(capture_duty <= (duty_output * (100 + CONF_TEST_TOLERANCE) / 100)) && \
(capture_duty >= (duty_output * (100 - CONF_TEST_TOLERANCE) / 100)) \
,"The result of Capture is wrong, captured frequency: %ldHz, captured duty: %ld%%",
capture_frequency,
capture_duty
);
}
/**
* \internal
* \brief Test Recoverable Fault (FAULTn)
*
* This test uses TCC0 as a PWM generator (compare function).
* EXTINT will be used to route fault input to TCC0.
*
* \param test Current test case.
*/
static void run_faultn_test(const struct test_case *test)
{
test_assert_true(test,
tcc_init_success == true,
"TCC initialization failed, skipping test");
/* Configure TCC module for PWM generation with fault */
tcc_reset(&tcc_test0_module);
tcc_get_config_defaults(&tcc_test0_config, CONF_TEST_TCC0);
tcc_test0_config.counter.period = 0x03FF;
tcc_test0_config.compare.wave_generation =
TCC_WAVE_GENERATION_SINGLE_SLOPE_PWM;
tcc_test0_config.compare.match[TCC_MATCH_CAPTURE_CHANNEL_0] = 0x01FF;
tcc_test0_config.wave_ext.recoverable_fault[TCC_MATCH_CAPTURE_CHANNEL_0].source = TCC_FAULT_SOURCE_ENABLE;
tcc_test0_config.wave_ext.recoverable_fault[TCC_MATCH_CAPTURE_CHANNEL_0].halt_action = TCC_FAULT_HALT_ACTION_SW_HALT;
tcc_init(&tcc_test0_module, CONF_TEST_TCC0, &tcc_test0_config);
/* Configure TCC events for recoverable fault input */
struct tcc_events tcc_test_events;
memset(&tcc_test_events, 0, sizeof(struct tcc_events));
tcc_test_events.on_event_perform_channel_action[TCC_MATCH_CAPTURE_CHANNEL_0] = true;
tcc_enable_events(&tcc_test0_module, &tcc_test_events);
tcc_enable(&tcc_test0_module);
/* Configure IO pin to generate fault */
struct port_config config_pin;
port_get_config_defaults(&config_pin);
config_pin.direction = PORT_PIN_DIR_OUTPUT;
port_pin_set_config(CONF_TEST_PIN_OUT, &config_pin);
port_pin_set_output_level(CONF_TEST_PIN_OUT, true);
/* Configure EIC to capture fault input */
struct extint_chan_conf config;
extint_chan_get_config_defaults(&config);
config.filter_input_signal = true;
config.detection_criteria = EXTINT_DETECT_BOTH;
config.gpio_pin = CONF_EIC_PIN;
config.gpio_pin_mux = CONF_EIC_MUX;
extint_chan_set_config(CONF_EIC_CHAN, &config);
struct extint_events extint_test_events;
memset(&extint_test_events, 0, sizeof(struct extint_events));
extint_test_events.generate_event_on_detect[CONF_EIC_CHAN] = true;
extint_enable_events(&extint_test_events);
/* Configure EVENTs to route fault input */
struct events_resource event_resource;
struct events_config event_config;
events_get_config_defaults(&event_config);
event_config.generator = CONF_EVENT_GENERATOR_ID;
event_config.path = EVENTS_PATH_ASYNCHRONOUS;
events_allocate(&event_resource, &event_config);
events_attach_user(&event_resource, CONF_EVENT_USER_ID_FAULTn);
/* Clear halt status */
tcc_clear_status(&tcc_test0_module,
TCC_STATUS_RECOVERABLE_FAULT_PRESENT(0) |
TCC_STATUS_RECOVERABLE_FAULT_OCCUR(0));
uint32_t test_val1 = tcc_get_count_value(&tcc_test0_module);
uint32_t test_val2 = tcc_get_count_value(&tcc_test0_module);
/* Check TCC is running */
test_assert_true(test,
test_val1 != test_val2,
"The counter failed to stop on recoverable fault");
/* Set fault */
port_pin_set_output_level(CONF_TEST_PIN_OUT, false);
/* Check fault state */
test_assert_true(test,
TCC_STATUS_RECOVERABLE_FAULT_OCCUR(0) &
tcc_get_status(&tcc_test0_module),
"The counter failed to detect recoverable fault");
/* Check TCC is running */
test_val1 = tcc_get_count_value(&tcc_test0_module);
test_val2 = tcc_get_count_value(&tcc_test0_module);
test_assert_true(test,
test_val1 == test_val2,
"The counter failed to stop on recoverable fault");
}
