dev_pwm.h

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/*
 * Copyright (c) 2006-2024 RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-05-07     aozima       the first version
 * 2022-09-24     yuqi         add phase and dead time configuration
 */
 
#ifndef __DEV_PWM_H__
#define __DEV_PWM_H__
 
#include <rtthread.h>

#define PWM_CMD_ENABLE      (RT_DEVICE_CTRL_BASE(PWM) + 0)
#define PWM_CMD_DISABLE     (RT_DEVICE_CTRL_BASE(PWM) + 1)
#define PWM_CMD_SET         (RT_DEVICE_CTRL_BASE(PWM) + 2)
#define PWM_CMD_GET         (RT_DEVICE_CTRL_BASE(PWM) + 3)
#define PWMN_CMD_ENABLE     (RT_DEVICE_CTRL_BASE(PWM) + 4)
#define PWMN_CMD_DISABLE    (RT_DEVICE_CTRL_BASE(PWM) + 5)
#define PWM_CMD_SET_PERIOD  (RT_DEVICE_CTRL_BASE(PWM) + 6)
#define PWM_CMD_SET_PULSE   (RT_DEVICE_CTRL_BASE(PWM) + 7)
#define PWM_CMD_SET_DEAD_TIME  (RT_DEVICE_CTRL_BASE(PWM) + 8)
#define PWM_CMD_SET_PHASE   (RT_DEVICE_CTRL_BASE(PWM) + 9)
#define PWM_CMD_ENABLE_IRQ  (RT_DEVICE_CTRL_BASE(PWM) + 10)
#define PWM_CMD_DISABLE_IRQ  (RT_DEVICE_CTRL_BASE(PWM) + 11)

struct rt_pwm_configuration
{
    rt_uint32_t channel; /* 0 ~ n or 0 ~ -n, which depends on specific MCU requirements */
    rt_uint32_t period;  /* unit:ns 1ns~4.29s:1Ghz~0.23hz */
    rt_uint32_t pulse;   /* unit:ns (pulse<=period) */
    rt_uint32_t dead_time;  /* unit:ns */
    rt_uint32_t phase;  /*unit: degree, 0~360, which is the phase of pwm output, */
    /*
     * RT_TRUE  : The channel of pwm is complememtary.
     * RT_FALSE : The channel of pwm is nomal.
    */
    rt_bool_t  complementary;
};
 
struct rt_device_pwm;
struct rt_pwm_ops
{
    rt_err_t (*control)(struct rt_device_pwm *device, int cmd, void *arg);
};

struct rt_device_pwm
{
    struct rt_device parent;
    const struct rt_pwm_ops *ops;
};

rt_err_t rt_device_pwm_register(struct rt_device_pwm *device, const char *name, const struct rt_pwm_ops *ops, const void *user_data);

rt_err_t rt_pwm_enable(struct rt_device_pwm *device, int channel);

rt_err_t rt_pwm_disable(struct rt_device_pwm *device, int channel);

rt_err_t rt_pwm_set(struct rt_device_pwm *device, int channel, rt_uint32_t period, rt_uint32_t pulse);

rt_err_t rt_pwm_set_period(struct rt_device_pwm *device, int channel, rt_uint32_t period);

rt_err_t rt_pwm_set_pulse(struct rt_device_pwm *device, int channel, rt_uint32_t pulse);

rt_err_t rt_pwm_set_dead_time(struct rt_device_pwm *device, int channel, rt_uint32_t dead_time);

rt_err_t rt_pwm_set_phase(struct rt_device_pwm *device, int channel, rt_uint32_t phase);

 
#endif /* __DEV_PWM_H__ */