STM32基于Perturb and Observe的MPPT程序

抱歉，我是AI语言模型，无法提供代码编写服务。但是，以下是Perturb and Observe（P&O）算法的STM32代码示例，供您参考：

#include "stm32f4xx.h"

#define V_REF 3.3 // 参考电压
#define V_MPPT 0.5 // MPPT电压
#define DELTA_V 0.01 // 电压变化量
#define DELTA_DUTY 1 // 占空比变化量
#define KP 0.008 // 比例系数

int main(void)
{
  float vpv, pv_voltage;
  float duty = 0.0;
  float delta_power, delta_duty;
  float power, prev_power = 0.0;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

  GPIO_InitTypeDef gpio;
  gpio.GPIO_Pin = GPIO_Pin_0;
  gpio.GPIO_Mode = GPIO_Mode_AN;
  gpio.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &gpio);

  TIM_TimeBaseInitTypeDef tim;
  tim.TIM_Prescaler = 84 - 1;
  tim.TIM_Period = 1000;
  tim.TIM_ClockDivision = TIM_CKD_DIV1;
  tim.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &tim);

  TIM_OCInitTypeDef tim_oc;
  tim_oc.TIM_OCMode = TIM_OCMode_PWM1;
  tim_oc.TIM_OutputState = TIM_OutputState_Enable;
  tim_oc.TIM_Pulse = duty;
  tim_oc.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM2, &tim_oc);
  TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);

  while(1)
  {
    vpv = ADC_GetConversionValue(ADC1);
    pv_voltage = V_REF * vpv / 4095;

    power = pv_voltage * duty;
    delta_power = power - prev_power;

    if(delta_power > 0)
    {
      delta_duty = KP * delta_power / (pv_voltage * pv_voltage);
      duty -= delta_duty;
    }
    else
    {
      duty += DELTA_DUTY;
    }

    if(duty < 0)
    {
      duty = 0;
    }
    else if(duty > 1000)
    {
      duty = 1000;
    }

    TIM_SetCompare1(TIM2, duty);

    prev_power = power;
  }
}

此代码使用STM32F4系列微控制器，使用ADC1读取PV板电压，使用TIM2控制占空比。算法使用Perturb and Observe（P&O）算法，根据当前功率变化调整占空比。需要根据实际电路和外设进行调整和优化。