STM32F103C8T6 L298N驱动代码

以下是使用STM32F103C8T6和L298N电机驱动芯片的示例代码:

#include "stm32f10x.h"

int main(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

    GPIO_StructInit(&GPIO_InitStructure);
    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);

    GPIO_StructInit(&GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseStructure.TIM_Period = 1000 - 1;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    TIM_OCStructInit(&TIM_OCInitStructure);
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);
    TIM_OC2Init(TIM3, &TIM_OCInitStructure);

    TIM_Cmd(TIM3, ENABLE);

    while(1)
    {
        GPIO_SetBits(GPIOB, GPIO_Pin_0);
        GPIO_ResetBits(GPIOB, GPIO_Pin_1);
        TIM_SetCompare1(TIM3, 500); // set duty cycle to 50%

        GPIO_SetBits(GPIOB, GPIO_Pin_2);
        GPIO_ResetBits(GPIOB, GPIO_Pin_3);
        TIM_SetCompare2(TIM3, 250); // set duty cycle to 25%

        for(int i = 0; i < 100000; i++); // delay
    }
}

这段代码使用了STM32F103C8T6微控制器和L298N电机驱动芯片控制两个直流电机。在程序的主循环中，我们设置PB0和PB2引脚为HIGH，设置PB1和PB3引脚为LOW，以向电机提供电源。然后，在TIM3的通道1和通道2上使用PWM信号来控制电机的速度。通过调整TIM3通道1和通道2上的占空比，可以改变电机的速度。