STM32F103C8T6 L298N驱动代码

以下是一个简单的STM32F103C8T6控制L298N驱动的代码示例。

#include "stm32f10x.h"

#define PWM_PERIOD 1000

void TIM2_Configuration(void);
void GPIO_Configuration(void);

int main(void)
{
    TIM2_Configuration();
    GPIO_Configuration();

    while(1) {
        GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_SET);
        GPIO_WriteBit(GPIOA, GPIO_Pin_1, Bit_RESET);
        TIM_SetCompare1(TIM2, PWM_PERIOD / 2);

        GPIO_WriteBit(GPIOA, GPIO_Pin_2, Bit_SET);
        GPIO_WriteBit(GPIOA, GPIO_Pin_3, Bit_RESET);
        TIM_SetCompare2(TIM2, PWM_PERIOD / 2);

        // 延时1秒
        int i;
        for (i = 0; i < 1000000; i++);
    }
}

// 配置TIM2
void TIM2_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.TIM_Period = PWM_PERIOD - 1;
    TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &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_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM2, &TIM_OCInitStructure);
    TIM_OC2Init(TIM2, &TIM_OCInitStructure);

    TIM_Cmd(TIM2, ENABLE);
}

// 配置GPIO
void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    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(GPIOA, &GPIO_InitStructure);
}

在这个例子中，PWM周期设置为1000，预分频器为72，即PWM信号的频率为1kHz。使用TIM2的两个输出通道来驱动L298N的两个电机，以产生PWM信号。通过GPIO口控制L298N的使能和方向引脚。最后，通过延时函数来控制电机的转动时间。

请注意，这只是一个简单的示例，实际应用中需要根据具体情况进行修改和优化。