做一个stm32F103C8T6单片机驱动l298n电机实现四轮小车驱动的程序
时间: 2024-04-09 21:27:23 浏览: 92
你可以使用STM32F103C8T6单片机驱动L298N电机来实现四轮小车的驱动。以下是一个简单的示例程序,用于控制四个电机的转动方向和速度。请注意,这只是一个基本的框架,您可能需要根据您的具体需求进行适当的修改和优化。
```c
#include "stm32f10x.h"
// 定义电机引脚
#define ENA_PIN GPIO_Pin_0
#define ENA_PORT GPIOA
#define IN1_PIN GPIO_Pin_1
#define IN1_PORT GPIOA
#define IN2_PIN GPIO_Pin_2
#define IN2_PORT GPIOA
#define ENB_PIN GPIO_Pin_3
#define ENB_PORT GPIOA
#define IN3_PIN GPIO_Pin_4
#define IN3_PORT GPIOA
#define IN4_PIN GPIO_Pin_5
#define IN4_PORT GPIOA
// 初始化GPIO和PWM
void initGPIO(void)
{
// 使能GPIO和PWM时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
// 初始化PWM引脚
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 配置PWM
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseStructure.TIM_Period = 999; // PWM周期为1000个计数单位
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1; // 预分频器为72,得到1MHz的计数频率
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
// 配置PWM输出通道
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0; // 初始占空比为0
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_OC4Init(TIM2, &TIM_OCInitStructure);
TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable);
// 启动PWM定时器
TIM_Cmd(TIM2, ENABLE);
}
// 设置电机方向和速度
void setMotorSpeed(uint32_t motorNumber, uint32_t speed)
{
if (speed > 1000)
speed = 1000;
switch (motorNumber)
{
case 1:
if (speed > 0)
{
GPIO_SetBits(IN1_PORT, IN1_PIN);
GPIO_ResetBits(IN2_PORT, IN2_PIN);
}
else
{
GPIO_ResetBits(IN1_PORT, IN1_PIN);
GPIO_SetBits(IN2_PORT, IN2_PIN);
speed = -speed;
}
TIM_SetCompare1(TIM2, speed);
break;
case 2:
if (speed > 0)
{
GPIO_SetBits(IN3_PORT, IN3_PIN);
GPIO_ResetBits(IN4_PORT, IN4_PIN);
}
else
{
GPIO_ResetBits(IN3_PORT, IN3_PIN);
GPIO_SetBits(IN4_PORT, IN4_PIN);
speed = -speed;
}
TIM_SetCompare2(TIM2, speed);
break;
case 3:
if (speed > 0)
{
GPIO_SetBits(IN1_PORT, IN1_PIN);
GPIO_ResetBits(IN2_PORT, IN2_PIN);
}
else
{
GPIO_ResetBits(IN1_PORT, IN1_PIN);
GPIO_SetBits(IN2_PORT, IN2_PIN);
speed = -speed;
}
TIM_SetCompare3(TIM2, speed);
break;
case 4:
if (speed > 0)
{
GPIO_SetBits(IN3_PORT, IN3_PIN);
GPIO_ResetBits(IN4_PORT, IN4_PIN);
}
else
{
GPIO_ResetBits(IN3_PORT, IN3_PIN);
GPIO_SetBits(IN4_PORT, IN4_PIN);
speed = -speed;
}
TIM_SetCompare4(TIM2, speed);
break;
}
}
int main(void)
{
// 初始化GPIO和PWM
initGPIO();
// 设置电机1和2的速度为500
setMotorSpeed(1, 500);
setMotorSpeed(2, 500);
while (1)
{
// 执行其他任务
}
}
```
以上代码中的引脚定义和初始化基于STM32F103C8T6开发板上的引脚分配,您可能需要根据您的硬件连接进行适当修改。
请注意,这只是一个简单的示例程序,仅用于演示如何驱动四轮小车。在实际应用中,您可能需要添加更多的功能和保护机制。另外,还要根据您的具体需求调整PWM频率和占空比范围。
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