stm32控制舵机的程序怎么编写
时间: 2024-02-07 16:03:27 浏览: 98
代码—2.GM995舵机驱动函数.zip
控制舵机需要使用PWM信号,而STM32系列的微控制器都具备了强大的PWM功能模块,可以轻松实现舵机控制。以下是一个简单的示例程序:
1. 配置PWM模块,使其输出频率为50Hz,占空比为0-100%。
```c
#include "stm32f10x.h"
void PWM_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_TIM1, ENABLE);
//配置PWM输出引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//配置TIM1为PWM输出模式
TIM_TimeBaseStructure.TIM_Period = 20000 - 1; //50Hz
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1; //72MHz
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
//配置TIM1通道1为PWM输出模式
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(TIM1, &TIM_OCInitStructure);
TIM_Cmd(TIM1, ENABLE);
}
```
2. 根据舵机的占空比范围,计算舵机的PWM输出值,并写入TIM1通道1的CCR寄存器中。
```c
void SetServoAngle(int angle)
{
int value = (int)(angle * 10.0 / 18.0) + 500; //计算PWM输出值
TIM_SetCompare1(TIM1, value); //写入CCR寄存器
}
```
在主函数中,可以调用PWM_Configuration()函数初始化PWM模块,然后通过调用SetServoAngle()函数设置舵机的角度,即可实现舵机控制。例如,将舵机转到45度的代码如下:
```c
int main(void)
{
PWM_Configuration();
SetServoAngle(45);
while (1);
}
```
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