stm32驱动电调

安逸吼

想用stm32驱动一个电调，但是一直初始化不了。大神们帮我看一下是哪里错了
void TIM_Configuration(void)
{
 /* 定义 TIM_TimeBase 初始化结构体 TIM_TimeBaseStructure */
 TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
 /* 定义 TIM_OCInit 初始化结构体 TIM_OCInitStructure */
 TIM_OCInitTypeDef  TIM_OCInitStructure;
 

 TIM_TimeBaseStructure.TIM_Period =1999;
 TIM_TimeBaseStructure.TIM_Prescaler =71;
 TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1;
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 
 TIM_TimeBaseInit(TIM4 , &TIM_TimeBaseStructure);

 /*  设置 OC1,OC2,OC3,OC4 通道
 *   工作模式为 PWM 输出模式
 *   使能比较匹配输出极性
 *   时钟分割0
 *   向上计数模式
 *
 * 设置各匹配值分别为 CCR1_Val, CCR1_Val, CCR1_Val, CCR1_Val
 * 得到的占空比分别为 50%, 37.5%, 25%, 12.5% 
 */

 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 
 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

 TIM_OCInitStructure.TIM_Pulse = B_m1; 
 TIM_OC1Init(TIM4, &TIM_OCInitStructure);
  
 TIM_OCInitStructure.TIM_Pulse = B_m2; 
 TIM_OC2Init(TIM4, &TIM_OCInitStructure);
 
 TIM_OCInitStructure.TIM_Pulse = B_m3; 
 TIM_OC3Init(TIM4, &TIM_OCInitStructure);
  
 TIM_OCInitStructure.TIM_Pulse = B_m4; 
 TIM_OC4Init(TIM4, &TIM_OCInitStructure);

 /* 使能预装载寄存器 */
 TIM_OC1PreloadConfig(TIM4 , TIM_OCPreload_Enable);
 TIM_OC2PreloadConfig(TIM4 , TIM_OCPreload_Enable);
 TIM_OC3PreloadConfig(TIM4 , TIM_OCPreload_Enable);
 TIM_OC4PreloadConfig(TIM4 , TIM_OCPreload_Enable);

 TIM_ARRPreloadConfig(TIM4, ENABLE);
 
 /* 启动 TIM 计数 */
 TIM_Cmd(TIM4 , ENABLE); 
}

正点原子

帮顶。。。。

安逸吼

补充一下，这是我的油门设置。T是周期1999的。我在想会不会是这边出错了
 while (1){
    if(GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_3)==0)
    {{B_m1=B_m1+1; B_m2=B_m2+1; B_m3=B_m3+1; B_m4=B_m4+1;  for(i=0;i<1000;i++);  
    if(B_m1>=T) B_m1=T;
       if(B_m1<0)  B_m1=0;
if(B_m2>=T) B_m2=T;
if(B_m2<0)  B_m2=0;
if(B_m3>=T) B_m3=T;
if(B_m3<0)  B_m3=0;
if(B_m4>=T) B_m4=T;
if(B_m4<0)  B_m4=0;
   TIM_SetCompare1(TIM4,B_m1);  TIM_SetCompare2(TIM4,B_m2); TIM_SetCompare3(TIM4,B_m3); TIM_SetCompare4(TIM4,B_m4); }}
     if(GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_4)==0){B_m1=B_m1-1;  B_m2=B_m2-1; B_m3=B_m3-1; B_m4=B_m4-1;   for(i=0;i<1000;i++);
 if(B_m1>=T) B_m1=T;
       if(B_m1<0)  B_m1=0;
if(B_m2>=T) B_m2=T;
if(B_m2<0)  B_m2=0;
if(B_m3>=T) B_m3=T;
if(B_m3<0)  B_m3=0;
if(B_m4>=T) B_m4=T;
if(B_m4<0)  B_m4=0;
   TIM_SetCompare1(TIM4,B_m1); TIM_SetCompare2(TIM4,B_m2); TIM_SetCompare3(TIM4,B_m3); TIM_SetCompare4(TIM4,B_m4); }
   
    }
}