stm32f103c8t6pwm控制电机代码

以下是一个使用 STM32F103C8T6 的 PWM 控制电机的示例代码，假设使用的是 TIM3 通道 1 和 2 控制两个电机。

#include "stm32f10x.h"

void TIM3_PWM_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

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

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

    /* Configure PA6 and PA7 as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Time base configuration */
    TIM_TimeBaseStructure.TIM_Period = 999; // 1kHz frequency
    TIM_TimeBaseStructure.TIM_Prescaler = 71; // 72MHz/72 = 1MHz
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    /* PWM1 Mode configuration: Channel1 */
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0; // 0% duty cycle
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

    /* PWM1 Mode configuration: Channel2 */
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0; // 0% duty cycle
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC2Init(TIM3, &TIM_OCInitStructure);
    TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);

    /* TIM3 enable counter */
    TIM_Cmd(TIM3, ENABLE);
}

int main(void)
{
    TIM3_PWM_Init();

    while (1) {
        TIM_SetCompare1(TIM3, 500); // 50% duty cycle for channel 1
        TIM_SetCompare2(TIM3, 250); // 25% duty cycle for channel 2
    }
}

在上述代码中，使用了 TIM3 的 PWM 模式，通过 GPIOA 的 PA6 和 PA7 引脚连接到电机的控制信号输入端口，使用了 TIM3 的通道 1 和 2 控制两个电机。通过调整 `TIM_SetCompare1` 和 `TIM_SetCompare2` 函数的参数，可以改变 PWM 的占空比，从而控制电机的转速。