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#include <stdbool.h>
#include <stdint.h>
void pwm_init(void);
void pwm_start(void);
void pwm_set_duty(int16_t duty, uint8_t channel);
uint16_t pwm_get_duty(uint8_t channel);
void pwm_set_freq(uint16_t freq, uint8_t channel);
uint16_t pwm_get_freq(uint8_t channel);
int pwm_add(uint8_t pin_id, uint32_t pin_mux, uint32_t pin_func);
bool pwm_delete(uint8_t channel);