S曲线pwm占空比代码，动态调节占空比

好的，以下是一个使用 S 曲线控制 PWM 占空比的示例代码，可以动态调节占空比：

#include "stm32f10x.h"
#include <math.h>

// 定义 PWM 的周期和初始占空比
#define PWM_PERIOD 1000
#define PWM_DUTY_CYCLE_INIT 500

// 定义 S 曲线参数
#define S_CURVE_MAX_STEP 20
#define S_CURVE_ALPHA 0.2
#define S_CURVE_BETA 0.5

// 定义全局变量
uint16_t PWM_DUTY_CYCLE = PWM_DUTY_CYCLE_INIT;
uint16_t PWM_DUTY_CYCLE_TARGET = PWM_DUTY_CYCLE_INIT;

void TIM1_PWM_Init(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    // 使能 TIM1 和 GPIOA 时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA, ENABLE);

    // 配置 GPIOA 引脚为复用推挽输出
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // TIM1 配置
    TIM_TimeBaseStructure.TIM_Period = PWM_PERIOD - 1;
    TIM_TimeBaseStructure.TIM_Prescaler = 71;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

    // PWM 配置
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = PWM_DUTY_CYCLE - 1;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);

    // 启动 TIM1 和 PWM 输出通道
    TIM_Cmd(TIM1, ENABLE);
    TIM_CtrlPWMOutputs(TIM1, ENABLE);
}

void TIM2_S_CURVE_Init(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    // 使能 TIM2 时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    // TIM2 配置
    TIM_TimeBaseStructure.TIM_Period = S_CURVE_MAX_STEP - 1;
    TIM_TimeBaseStructure.TIM_Prescaler = 7199;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    // 配置 TIM2 中断
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    // 启动 TIM2 和中断
    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
    TIM_Cmd(TIM2, ENABLE);
}

void TIM2_IRQHandler(void)
{
    static uint16_t s_curve_step = 0;
    static float s_curve_output = PWM_DUTY_CYCLE_INIT;

    // S 曲线计算
    if (s_curve_step <= S_CURVE_MAX_STEP / 2)
    {
        s_curve_output += S_CURVE_ALPHA;
    }
    else
    {
        s_curve_output -= S_CURVE_BETA;
    }
    s_curve_step++;

    // 更新 PWM 占空比
    PWM_DUTY_CYCLE = (uint16_t)round(s_curve_output);
    if (PWM_DUTY_CYCLE >= PWM_PERIOD)
    {
        PWM_DUTY_CYCLE = PWM_PERIOD - 1;
    }
    TIM_SetCompare1(TIM1, PWM_DUTY_CYCLE - 1);

    // 更新目标占空比
    if (PWM_DUTY_CYCLE == PWM_DUTY_CYCLE_TARGET)
    {
        TIM_Cmd(TIM2, DISABLE);
    }

    // 清除 TIM2 中断标志
    TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
}

int main(void)
{
    TIM1_PWM_Init();
    TIM2_S_CURVE_Init();

    while (1)
    {
        // 主循环可以用来处理其他任务

        // 修改目标占空比
        PWM_DUTY_CYCLE_TARGET = 700;
        TIM_Cmd(TIM2, ENABLE);
    }
}

这段代码实现了使用 S 曲线控制 PWM 占空比，通过动态调节目标占空比来实现动态调节 PWM 输出。S 曲线的参数可以根据具体需求进行调整。在主循环中，你可以修改目标占空比来实现动态调节 PWM 输出。