pwm驱动舵机

liu5551195

如何通过示例代码驱动舵机转动，为什么我的舵机就不转!

liu5551195

#include "debug.h"
#include "PWM.h"

void TIM1_PWMOut_Init( u16 arr, u16 psc, u16 ccp )
{
GPIO_InitTypeDef GPIO_InitStructure={0};
TIM_OCInitTypeDef TIM_OCInitStructure={0};
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE );

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOA, &GPIO_InitStructure );

TIM_TimeBaseInitStructure.TIM_Period = arr;
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( TIM1, &TIM_TimeBaseInitStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = ccp;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init( TIM1, &TIM_OCInitStructure );

TIM_CtrlPWMOutputs(TIM1, ENABLE );
TIM_OC1PreloadConfig( TIM1, TIM_OCPreload_Disable );
TIM_ARRPreloadConfig( TIM1, ENABLE );
TIM_Cmd( TIM1, ENABLE );

}

liu5551195

#include "debug.h"
#include "led.h"
#include "key.h"
#include "openmv.h"
#include "PWM.h"

#define PWM_ARR 20000
#define PWM_PSC 72
int main(void){
TIM1_PWMOut_Init(PWM_ARR, PWM_PSC, 1500); // 设置ARR值、PSC值和占空比
while(1){
// 这里可以通过修改占空比来控制舵机的转动角度
TIM_SetCompare1(TIM1, 1000); // 设置占空比为1000，舵机转到最左边
Delay_Ms(1000); // 延时1秒

            TIM_SetCompare1(TIM1, 1500); // 设置占空比为1500，舵机转到中间
            Delay_Ms(1000); // 延时1秒

            TIM_SetCompare1(TIM1, 2000); // 设置占空比为2000，舵机转到最右边
            Delay_Ms(1000); // 延时1秒
}

}

Benue

建议你用示波器看下输出波形。
驱动 PWM 舵机的一般波形见链接 https://blog.csdn.net/dddaron/article/details/100067885
注意 PWM 频率要低于 200Hz,否则可能不稳定