写的舵机程序没用，舵机就是不转啊，代码如下，大佬们帮我看看。

fjhdfu · 发表于 2021-7-12 14:33:33

void TIM3_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_6|GPIO_Pin_7);

GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3,ENABLE);

TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up;//计数模式.向上计数
TIM_TimeBaseInitStructure.TIM_Period=arr;
TIM_TimeBaseInitStructure.TIM_Prescaler=psc;//预分频系数

TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);

TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;//设置输出比较模式.模式2
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;//设置输出极性
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;//输出状态.输出
TIM_OCInitStructure.TIM_Pulse=1;

TIM_OC1Init(TIM3,&TIM_OCInitStructure);
TIM_OC2Init(TIM3,&TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Enable);
TIM_OC2PreloadConfig(TIM3,TIM_OCPreload_Enable);

TIM_Cmd(TIM3,ENABLE);
}

int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
delay_init();
TIM3_PWM_Init(19999,71);
while(1)
{
TIM_SetCompare1(TIM3,500);
TIM_SetCompare2(TIM3,500);
delay_ms(1000);
TIM_SetCompare1(TIM3,1500);
TIM_SetCompare2(TIM3,1500);
delay_ms(1000);

}
}