25.8.4.1.2 Code
Add to the main application source file, before any functions:
Add to the main application source file, outside of any functions:#define CONF_PWM_MODULE LED_0_PWM4CTRL_MODULE
#define CONF_PWM_CHANNEL LED_0_PWM4CTRL_CHANNEL
#define CONF_PWM_OUTPUT LED_0_PWM4CTRL_OUTPUT
#define CONF_PWM_OUT_PIN LED_0_PWM4CTRL_PIN
#define CONF_PWM_OUT_MUX LED_0_PWM4CTRL_MUX
Copy-paste the following callback function code to your user application:struct
tcc_module tcc_instance;
Copy-paste the following setup code to your user application:static
void
tcc_callback_to_change_duty_cycle(
struct
tcc_module *
const
module_inst)
{
static
uint32_t delay = 10;
static
uint32_t i = 0;
if
(--delay) {
return
;
}
delay = 10;
i = (i + 0x0800) & 0xFFFF;
tcc_set_compare_value(module_inst,
(
enum
tcc_match_capture_channel)
(TCC_MATCH_CAPTURE_CHANNEL_0 + CONF_PWM_CHANNEL),
i + 1);
}
Add to user application initialization (typically the start of main()):static
void
configure_tcc(
void
)
{
struct
tcc_config config_tcc;
tcc_get_config_defaults(&config_tcc, CONF_PWM_MODULE);
config_tcc.counter.period = 0xFFFF;
config_tcc.compare.wave_generation = TCC_WAVE_GENERATION_SINGLE_SLOPE_PWM;
config_tcc.compare.match[CONF_PWM_CHANNEL] = 0xFFFF;
config_tcc.pins.enable_wave_out_pin[CONF_PWM_OUTPUT] =
true
;
config_tcc.pins.wave_out_pin[CONF_PWM_OUTPUT] = CONF_PWM_OUT_PIN;
config_tcc.pins.wave_out_pin_mux[CONF_PWM_OUTPUT] = CONF_PWM_OUT_MUX;
tcc_init(&tcc_instance, CONF_PWM_MODULE, &config_tcc);
tcc_enable(&tcc_instance);
}
static
void
configure_tcc_callbacks(
void
)
{
tcc_register_callback(
&tcc_instance,
tcc_callback_to_change_duty_cycle,
(
enum
tcc_callback)(TCC_CALLBACK_CHANNEL_0 + CONF_PWM_CHANNEL));
tcc_enable_callback(&tcc_instance,
(
enum
tcc_callback)(TCC_CALLBACK_CHANNEL_0 + CONF_PWM_CHANNEL));
}
configure_tcc();
configure_tcc_callbacks();