stm32f103c8t6pwm控制舵机机程序
时间: 2023-09-03 10:05:48 浏览: 86
好的,以下是一个简单的基于STM32F103C8T6的PWM控制舵机的程序,你可以根据自己的需要进行修改:
```c
#include "stm32f10x.h"
// 定义控制舵机的GPIO口
#define Servo_GPIO GPIOB
#define Servo_PIN GPIO_Pin_0
// 定义PWM输出的GPIO口和通道号
#define PWM_GPIO GPIOA
#define PWM_PIN GPIO_Pin_1
#define PWM_CHANNEL TIM_Channel_2
void delay_ms(uint16_t ms) {
while (ms--) {
int i = 12000;
while (i--) {
__NOP();
}
}
}
void servo_init() {
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = Servo_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(Servo_GPIO, &GPIO_InitStructure);
Servo_GPIO->BRR = Servo_PIN;
}
void pwm_init() {
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
GPIO_InitStructure.GPIO_Pin = PWM_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(PWM_GPIO, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = 20000 - 1; // PWM频率为50Hz
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1; // 时钟预分频,72MHz/72=1MHz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 1500; // 舵机中心位置的脉宽
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_Cmd(TIM2, ENABLE);
}
void set_pwm_duty(uint16_t duty) {
TIM2->CCR2 = duty;
}
int main(void) {
servo_init();
pwm_init();
while (1) {
// 控制舵机转动到不同位置
set_pwm_duty(1000); // 脉宽为1ms,转到最左侧位置
delay_ms(1000);
set_pwm_duty(1500); // 脉宽为1.5ms,转到中间位置
delay_ms(1000);
set_pwm_duty(2000); // 脉宽为2ms,转到最右侧位置
delay_ms(1000);
}
}
```
注意:这只是一个简单的示例程序,实际使用时需要根据自己的舵机型号和要求进行调整。同时,为了提高PWM的精度和稳定性,建议使用定时器来生成PWM信号。
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