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这个舵机应该是180度的来回转动，为什么只一次性转到底呢？ 下面附上代码 #include "timer.h"#include"led.h"#include "delay.h"
//STM32F103ZE核心板
//定时器 驱动代码
////////////////////////////////////////////////////////////////////////////////////通用定时器3中断初始化
//这里时钟选择为APB1的2倍，而APB1为36M
//arr：自动重装值。
//psc：时钟预分频数
//这里使用的是定时器3!
void TIM3_PWM_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
GPIO_InitTypeDef GPIO_InitStructure;
TIM_OCInitTypeDef TIM_OCInitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);
//RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE);
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler = psc;
// TIM_TimeBaseStructure.TIM_RepetitionCounter = ;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);
// TIM_OCInitStruct.TIM_OCIdleState = ;
TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM2;
// TIM_OCInitStruct.TIM_OCNIdleState = ;
// TIM_OCInitStruct.TIM_OCNPolarity = ;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
// TIM_OCInitStruct.TIM_OutputNState = ;
TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
// TIM_OCInitStruct.TIM_Pulse = ;
TIM_OC2Init(TIM3,&TIM_OCInitStruct);
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_Cmd(TIM3,ENABLE);
}
//定时器3中断服务程序
void TIM3_IRQHandler(void) //TIM3中断
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查TIM3更新中断发生与否
{
TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIMx更新中断标志
LED1=!LED1;
LED0 = !LED0;
}
}
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