(使用直流電機(jī)點(diǎn)亮LED. 發(fā)電機(jī)??? NO?YES?)

原理:采集電機(jī)輸入的電壓信號(hào)(adc)動(dòng)態(tài)改變PWM

STM32_Study: STM32_Study (gitee.com)

不逼逼 貼代碼

motor_led.c

/**
 * @file motor_led.c
 * @author WaterFairy (995637517@qq.com)
 * @brief 由電機(jī)信號(hào)強(qiáng)弱點(diǎn)燈
 * @version 1.0.0
 * @date 2022-04-28 14:04:59
 *
 * 1.電機(jī)負(fù)極接GND,正極接PA1.(反接也可;PA1:adc采集端口)
?*?2.PA8接PC13(PA8:PWM輸出端;PC13:LED負(fù)極端口)
 * @copyright Copyright (c) 2022
 *
 */
#include "stm32f10x.h"
#include <stdio.h>
/**
 * @brief 初始化adc
 * 由電機(jī)轉(zhuǎn)動(dòng)輸入電壓信號(hào)
 *
 */
void init_adc(void)
{
    // 1. gpio 配置
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitTypeDef gpio_structure;
    gpio_structure.GPIO_Mode = GPIO_Mode_AIN; //模擬輸入
    gpio_structure.GPIO_Pin = GPIO_Pin_1;     // pin_1
    gpio_structure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &gpio_structure);

    // 2. adc 配置
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
    RCC_ADCCLKConfig(RCC_PCLK2_Div6);                               //分頻
    ADC_InitTypeDef adc_structure;                                  // adc結(jié)構(gòu)體
    adc_structure.ADC_Mode = ADC_Mode_Independent;                  //獨(dú)立模式(單adc模式) / 雙adc模式 = 單
    adc_structure.ADC_DataAlign = ADC_DataAlign_Right;              //對(duì)齊方式 = 右對(duì)齊
    adc_structure.ADC_ContinuousConvMode = DISABLE;                 //連續(xù)模式 = 非
    adc_structure.ADC_ScanConvMode = DISABLE;                       //掃描模式 = 非
    adc_structure.ADC_NbrOfChannel = 1;                             //通道數(shù) = 1
    adc_structure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //外部觸發(fā)轉(zhuǎn)換源 = 使用軟件觸發(fā)
    ADC_Init(ADC1, &adc_structure);

    // 3. 規(guī)則組通道配置
    ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);

    // 4. 開(kāi)啟adc / 開(kāi)啟軟件轉(zhuǎn)換
    ADC_Cmd(ADC1, ENABLE);
    ADC_SoftwareStartConvCmd(ADC1, ENABLE);
    // 5. 校準(zhǔn)配置
    ADC_ResetCalibration(ADC1);
    while (ADC_GetResetCalibrationStatus(ADC1))
        ;
    ADC_StartCalibration(ADC1);
    while (ADC_GetCalibrationStatus(ADC1))
        ;
}

/**
 * @brief 初始化pwm
 * 由電壓信號(hào)轉(zhuǎn)換波形信號(hào)
 *
 */
void init_pwm(void)
{
    // 1.gpio
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitTypeDef gpio_structure;
    gpio_structure.GPIO_Mode = GPIO_Mode_AF_PP;   //輸入模式
    gpio_structure.GPIO_Pin = GPIO_Pin_8;         //引腳
    gpio_structure.GPIO_Speed = GPIO_Speed_50MHz; //速度
    GPIO_Init(GPIOA, &gpio_structure);

    // 2.tim
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
    TIM_InternalClockConfig(TIM1);
    TIM_TimeBaseInitTypeDef tim_base_structure;
    tim_base_structure.TIM_ClockDivision = TIM_CKD_DIV1;     //時(shí)鐘分頻
    tim_base_structure.TIM_CounterMode = TIM_CounterMode_Up; //計(jì)數(shù)方式
    tim_base_structure.TIM_Period = 4096 - 1;                //周期
    tim_base_structure.TIM_Prescaler = 72 - 1;               //預(yù)分頻
    tim_base_structure.TIM_RepetitionCounter = 0;            //重新計(jì)數(shù)
    TIM_TimeBaseInit(TIM1, &tim_base_structure);
    TIM_ClearFlag(TIM1, TIM_FLAG_Update);
    TIM_Cmd(TIM1, ENABLE);

    // 3.pwm
    TIM_OCInitTypeDef tim_oc_structure;
    TIM_OCStructInit(&tim_oc_structure);
    tim_oc_structure.TIM_OCMode = TIM_OCMode_PWM1;             // PWM1模式
    tim_oc_structure.TIM_OCPolarity = TIM_OCPolarity_Low;      //占空比內(nèi)輸出低電平
    tim_oc_structure.TIM_OutputState = TIM_OutputState_Enable; //輸出
    tim_oc_structure.TIM_Pulse = 0;                            //默認(rèn)0 ,閾值 CCR Capture Compare Register
    TIM_OC1Init(TIM1, &tim_oc_structure);
    //注:高級(jí)定時(shí)器使用(STM1)
    TIM_CtrlPWMOutputs(TIM1, ENABLE); // MOE 主輸出使能

    // 4.nvic
    TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);      // TIM1中斷配置
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // NVIC 優(yōu)先級(jí)分組
    NVIC_InitTypeDef nvic_structure;
    nvic_structure.NVIC_IRQChannel = TIM1_UP_IRQn;
    nvic_structure.NVIC_IRQChannelCmd = ENABLE;
    nvic_structure.NVIC_IRQChannelPreemptionPriority = 1;
    nvic_structure.NVIC_IRQChannelSubPriority = 1;
    NVIC_Init(&nvic_structure);
}

/**
 * @brief
 * 獲取adc值
 */
uint16_t get_motor_led_adc_value(void)
{
    uint8_t times = 10;       //采樣次數(shù)
    uint32_t total_value = 0; //采樣總值
    for (uint8_t i = 0; i < times; i++)
    {
        ADC_SoftwareStartConvCmd(ADC1, ENABLE);        //使能指定的 ADC1 的軟件轉(zhuǎn)換啟動(dòng)功能
        while (!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC)) //規(guī)則組/注入組轉(zhuǎn)換結(jié)束
            ;
        total_value += ADC_GetConversionValue(ADC1);
    }
    return total_value / times; //求平均
}

/**
 * @brief TIM1的更新中斷:TIM1_UP_IRQHandler
 * 動(dòng)態(tài)改變輸出波形
 * 關(guān)鍵:TIM_SetCompare1
 * 為避免其它文件重定義該函數(shù),注銷(xiāo)該代碼.如使用,請(qǐng)打開(kāi).
 */
void TIM1_UP_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM1, TIM_IT_Update))
    {
        //電壓
        uint16_t voltage = get_motor_led_adc_value();
        printf("voltage:%f\n", (float)voltage / 4096 * 3.3);
        TIM_SetCompare1(TIM1, voltage);
        //手動(dòng)清除中斷標(biāo)志位
        TIM_ClearITPendingBit(TIM1, TIM_IT_Update);
    }
}

void motor_led_init(void)
{
    init_adc();
    init_pwm();
}

motor_led.h

/**
 * @file motor_led.h
 * @author WaterFairy (995637517@qq.com)
 * @brief 
 * @version 1.0.0
 * @date 2022-04-28 14:04:08
 * 
 * @copyright Copyright (c) 2022
 * 
 */
#ifndef __MOTOR_LED_H__
#define __MOTOR_LED_H__

void motor_led_init(void);

#endif