使用stm32f103rct6标准库写用MPPT算法控制PWM波使电压输出恒为30V的代码

以下是一个简单的基于STM32F103RCT6的MPPT算法控制PWM输出电压的代码示例：

#include "stm32f10x.h"

#define PWM_PERIOD 2000 // PWM周期，单位为us
#define V_REF 3.3 // 参考电压，单位为V
#define V_OUT_TARGET 30.0 // 目标输出电压，单位为V
#define V_STEP 0.1 // 电压调节步进，单位为V

float adc_value = 0.0;
float v_out = 0.0;
float duty_cycle = 0.0;
float v_max = 0.0;

void ADC_Configuration(void)
{
    ADC_InitTypeDef ADC_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_ADCCLKConfig(RCC_PCLK2_Div6); // ADC时钟为APB2时钟的1/6
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1, ENABLE); // 使能GPIOA和ADC1时钟

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure); // 配置PA0为模拟输入

    ADC_DeInit(ADC1);
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
    ADC_Init(ADC1, &ADC_InitStructure);

    ADC_Cmd(ADC1, ENABLE);
    ADC_ResetCalibration(ADC1);
    while (ADC_GetResetCalibrationStatus(ADC1));
    ADC_StartCalibration(ADC1);
    while (ADC_GetCalibrationStatus(ADC1));
}

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

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    TIM_TimeBaseStructure.TIM_Period = PWM_PERIOD - 1;
    TIM_TimeBaseStructure.TIM_Prescaler = 71;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC4Init(TIM4, &TIM_OCInitStructure);
    TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);

    TIM_ARRPreloadConfig(TIM4, ENABLE);
    TIM_Cmd(TIM4, ENABLE);
}

void MPPT_Control(void)
{
    adc_value = ADC_GetConversionValue(ADC1) * V_REF / 4096.0; // 获取ADC采集值并转换为电压值
    v_out = adc_value * (V_OUT_TARGET / V_REF); // 计算当前输出电压
    if (v_out < V_OUT_TARGET) // 如果输出电压小于目标电压
    {
        duty_cycle += V_STEP / V_OUT_TARGET; // 增加占空比
    }
    else // 如果输出电压大于等于目标电压
    {
        duty_cycle -= V_STEP / V_OUT_TARGET; // 减小占空比
    }

    if (duty_cycle > 1.0) duty_cycle = 1.0; // 占空比限制在0到1之间
    if (duty_cycle < 0.0) duty_cycle = 0.0;

    TIM_SetCompare4(TIM4, (uint16_t)(duty_cycle * PWM_PERIOD)); // 设置PWM占空比
}

int main(void)
{
    ADC_Configuration();
    PWM_Configuration();

    while(1)
    {
        MPPT_Control(); // 执行MPPT控制算法
    }
}

其中，ADC采集的电压值通过MPPT算法计算得到需要调节的PWM占空比，然后通过TIM_SetCompare4()函数设置PWM占空比来控制输出电压。需要注意的是，此处的PWM周期为2000us，也就是500Hz的频率，你可以根据具体需求进行调整。