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124 lines
4.4 KiB
C
124 lines
4.4 KiB
C
/*
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* Copyright (c) 2022 OpenLuat & AirM2M
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef LUAT_PWM_H
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#define LUAT_PWM_H
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/**
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*@version V1.0
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*@attention
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1.在使用int luat_pwm_open(int channel, size_t period, size_t freq, int pnum);
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函数时依次依次设置PWM通道，设置PWM频率，设置占空比，PWM个数
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若需要使用设置PWM个数时，PWM频率不宜高于50K,若高于50K可能会多出几个个数的现象
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2.int luat_pwm_capture(int channel,int freq); 获取pwm 频率
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此函数获取PWM频率功能尚未实现
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*/
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/**
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* @ingroup luatos_device 外设接口
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* @{
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*/
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/**
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* @defgroup luatos_device_PWM PWM接口
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* @{
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*/
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#include "luat_base.h"
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/**
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* @brief PWM控制参数
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*/
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typedef struct luat_pwm_conf {
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int channel; /**<PWM通道 可选通道为 0 / 1 / 2 / 4 总计4个通道*/
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size_t period; /**<频率, 1Hz - 13MHz*/
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size_t pulse; /**<占空比，0-100 如将pulse设为50时输出高电平时间占周期50%时间 */
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size_t pnum; /**<输出周期 0为持续输出, 1为单次输出, 其他为指定脉冲数输出*/
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size_t precision; /**<分频精度, 100/256/1000, 默认为100, 若设备不支持会有日志提示*/
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} luat_pwm_conf_t;
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/**
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* @brief 配置pwm 参数
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*
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* @param conf->channel: 选择PWM通道 可选通道为 0 / 1 / 2 / 4 总计4个通道
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* conf->period : 设置产生的PWM频率
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* conf->pulse : 设置产生的PWM占空比
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* conf->pnum : 设置产生的PWM个数，若pnum设为0将一直输出PWM
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* @return int
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* 返回值为 0 : 配置PWM成功
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* 返回值为 -1: PWM通道选择错误
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* 返回值为 -2: PWM频率设置错误
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* 返回值为 -3：PWM占空比设置错误
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* 返回值为 -4: 该PWM通道已被使用
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*/
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int luat_pwm_setup(luat_pwm_conf_t* conf);
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/**
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* @brief 打开pwm 通道
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*
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* @param channel: 选择PWM通道 可选通道为 0 / 1 / 2 / 4 总计4个通道
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* period : 设置产生的PWM频率
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* pulse : 设置产生的PWM占空比
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* pnum ：设置产生的PWM个数，若pnum设为0将一直输出PWM
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* @return int
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* 返回值为 0 : 配置PWM成功
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* 返回值为 -1: PWM通道选择错误
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* 返回值为 -2: PWM频率设置错误
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* 返回值为 -3：PWM占空比设置错误
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* 返回值为 -4: 该PWM通道已被使用
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*/
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int luat_pwm_open(int channel, size_t period, size_t pulse, int pnum);
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/**
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* @brief 获取pwm 频率 本功能暂未实现
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*
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* @param id i2c_id
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* @return int
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*/
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int luat_pwm_capture(int channel,int freq);
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/**
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* @brief 关闭pwm 接口
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*
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* @param channel: 选择PWM通道 可选通道为 0 / 1 / 2 / 4 总计4个通道
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* @return int
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*/
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int luat_pwm_close(int channel);
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/**
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* @brief 修改占空比
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* @param channel: 选择pwm通道 可选通道为 0 / 1 / 2 / 4 总计4个通道
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* pulse ：修改pwm占空比值
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* @return int
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*/
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/*int luat_pwm_update_dutycycle(int channel,size_t pulse);函数使用方法*/
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/*此函数为修改PWM占空比函数，可在完成配置并打开PWM输出后，根据使用者需求改变PWM输出占空比*/
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/*可用于whiile 循环中，int channel 参数为要修改的PWM通道，size_t pulse 参数为将要输出的目标占空比*/
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/*使用者根据自身使用需求填入相应参数数值即可*/
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int luat_pwm_update_dutycycle(int channel,size_t pulse);
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/** @}*/
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/** @}*/
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/** @}*/
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#endif
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