nodemcu-firmware/sdk/esp_iot_sdk_v1.4.0/include/pwm.h

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#ifndef __PWM_H__
#define __PWM_H__
/*pwm.h: function and macro definition of PWM API , driver level */
/*user_light.h: user interface for light API, user level*/
/*user_light_adj: API for color changing and lighting effects, user level*/
/*NOTE!! : DO NOT CHANGE THIS FILE*/
/*SUPPORT UP TO 8 PWM CHANNEL*/
#define PWM_CHANNEL_NUM_MAX 8
struct pwm_param {
uint32 period;
uint32 freq;
uint32 duty[PWM_CHANNEL_NUM_MAX]; //PWM_CHANNEL<=8
};
/* pwm_init should be called only once, for now */
void pwm_init(uint32 period, uint32 *duty,uint32 pwm_channel_num,uint32 (*pin_info_list)[3]);
void pwm_start(void);
void pwm_set_duty(uint32 duty, uint8 channel);
uint32 pwm_get_duty(uint8 channel);
void pwm_set_period(uint32 period);
uint32 pwm_get_period(void);
uint32 get_pwm_version(void);
void set_pwm_debug_en(uint8 print_en);
#endif