void config_pwm(PWM_Type *ptr, uint8_t pin, uint8_t cmp_index, uint32_t reload, bool cmp_initial_zero, uint8_t hw_event_cmp)

{

pwm_cmp_config_t cmp_config = {0};

pwm_config_t pwm_config = {0};

pwm_stop_counter(ptr);

pwm_get_default_pwm_config(ptr, &pwm_config);//復(fù)位默認(rèn)pwm寄存器配置

pwm_get_default_cmp_config(ptr, &cmp_config);//復(fù)位默認(rèn)比較寄存器配置

pwm_config.enable_output = false;

pwm_config.dead_zone_in_half_cycle = 0;//半周期PWM死區(qū)設(shè)定

pwm_config.invert_output = false;//反轉(zhuǎn)輸出電平設(shè)定

pwm_set_reload(ptr, 0, reload);//設(shè)置重裝載值

pwm_set_start_count(ptr, 0, 0);//設(shè)置PWM定時(shí)器起始值

//預(yù)配置寄存器信息

cmp_config.mode = pwm_cmp_mode_output_compare;//設(shè)定PWM定時(shí)器比較模式為

cmp_config.cmp = cmp_initial_zero ? 0 : reload + 1;//設(shè)定比較值cmp

cmp_config.update_trigger = pwm_shadow_register_update_on_modify;//更新觸發(fā)方式為立即更新

pwm_config_cmp(ptr, cmp_index, &cmp_config);//PWM配置更新

//更新觸發(fā)器類(lèi)型，以便在硬件事件（重新加載）時(shí)更新比較值

cmp_config.update_trigger = pwm_shadow_register_update_on_hw_event;

//將pwm配置為cmp驅(qū)動(dòng)的輸出

if (status_success != pwm_setup_waveform(ptr, pin, &pwm_config, cmp_index, &cmp_config, 1)) {

printf("failed to setup waveformn");

while(1);

}//pwm_setup_waveform設(shè)定輸出PWM波形

//配置硬件事件

cmp_config.cmp = reload - 1;

cmp_config.update_trigger = pwm_shadow_register_update_on_hw_event;

pwm_load_cmp_shadow_on_match(ptr, hw_event_cmp, &cmp_config);//設(shè)定影子寄存器

}

static inline void pwm_start_counter(PWM_Type *pwm_x)

intc_m_enable_irq_with_priority(irq, priority)