使用stm32f103rct6标准库写用MPPT算法控制PWM波ADC多通道采集使电压输出恒为30V的代码

这是一个比较复杂的控制系统，需要涉及到多个模块的代码编写。以下是大致的流程和代码框架：

1. 初始化ADC和PWM模块，设置对应的GPIO引脚。

#include "stm32f10x.h"

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

    /* Enable GPIOA clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    /* Configure PA1 as analog input */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Enable ADC1 clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

    /* Configure 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);

    /* Enable ADC1 */
    ADC_Cmd(ADC1, ENABLE);

    /* Start ADC1 Software Conversion */
    ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}

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

    /* Enable GPIOB clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    /* Configure PB0 as PWM output */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    /* Enable TIM3 clock */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

    /* Configure TIM3 */
    TIM_TimeBaseStructure.TIM_Period = 8399;
    TIM_TimeBaseStructure.TIM_Prescaler = 999;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    /* Configure TIM3 Channel 3 */
    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_OC3Init(TIM3, &TIM_OCInitStructure);

    /* Enable TIM3 outputs */
    TIM_CtrlPWMOutputs(TIM3, ENABLE);

    /* Enable TIM3 */
    TIM_Cmd(TIM3, ENABLE);
}

2. 实现MPPT算法，根据当前电压和电流计算出最佳功率点的电压值。

#define VOLTAGE_MAX 36
#define VOLTAGE_MIN 0
#define POWER_MAX (VOLTAGE_MAX * VOLTAGE_MAX / 4)

float MPPT(float voltage, float current)
{
    static float voltage_old = 0;
    static float power_old = 0;
    static float delta_v = 0;
    static float delta_p = 0;

    /* Calculate change in voltage and power */
    delta_v = voltage - voltage_old;
    delta_p = voltage * current - power_old;

    /* Update old values */
    voltage_old = voltage;
    power_old = voltage * current;

    /* Calculate duty cycle */
    float duty_cycle = TIM3->CCR3 / (float)TIM3->ARR;
    if (delta_p > 0 && voltage > VOLTAGE_MIN && voltage < VOLTAGE_MAX) {
        duty_cycle += 0.01;
    } else if (delta_p < 0) {
        duty_cycle -= 0.01;
    }
    duty_cycle = duty_cycle > 1 ? 1 : duty_cycle < 0 ? 0 : duty_cycle;

    /* Calculate target voltage */
    float target_voltage = voltage + delta_v * delta_p / POWER_MAX;

    return target_voltage;
}

3. 在主循环中读取ADC采集的电压和电流值，并根据MPPT算法计算出目标电压值，然后调整PWM的占空比以达到目标电压值。

int main(void)
{
    ADC_Init();
    PWM_Init();

    while (1) {
        /* Read voltage */
        uint16_t adc_value = ADC_GetConversionValue(ADC1);
        float voltage = adc_value * 3.3 / 4095 * 11;

        /* Read current */
        float current = ...; // read current from another ADC channel

        /* Calculate target voltage using MPPT */
        float target_voltage = MPPT(voltage, current);

        /* Adjust PWM duty cycle to reach target voltage */
        uint16_t duty_cycle = target_voltage / 36 * 8399;
        TIM3->CCR3 = duty_cycle;

        /* Wait for next ADC conversion */
        while (!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));
        ADC_ClearFlag(ADC1, ADC_FLAG_EOC);
    }
}

需要注意的是，以上代码只是一个大致的框架，实际上还需要考虑很多细节问题，例如ADC采集周期、PWM调节精度、电路保护等等。实际上的代码编写需要根据具体的电路和要求进行调整。