为什么只设置TIM1的CH1，TIM1的所有通道都有PWM输出？PE7-13都有PWM 输出

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[mw_shl_code=c,true] [/mw_shl_code] [mw_shl_code=c,true] [/mw_shl_code] [mw_shl_code=c,true]//arr：自动重装值 //psc：时钟预分频数 void TIM1_CH1_PWM_RmapInit(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_DeInit(TIM1);//初始化TIM1寄存器 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO , ENABLE); //使能GPIO外设和AFIO复用功能模块时钟 GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE); //Timer1完全重映射 TIM1_CH1->E9 //设置该引脚为复用输出功能,输出TIM1 CH1的PWM脉冲波形 GPIOE.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //TIM1_CH1 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化GPIO //初始化TIM1 TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值 TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0; TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 //初始化TIM1 Channel1 PWM模式 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式1 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_Pulse = arr/2; TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC1 TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR1上的预装载寄存器 // TIM_OC2Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC1 // TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR1上的预装载寄存器 // // TIM_OC3Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC1 // TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR1上的预装载寄存器 // // TIM_OC4Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC1 // TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR1上的预装载寄存器 TIM_ARRPreloadConfig(TIM1, ENABLE); //使能TIMx在ARR上的预装载寄存器 TIM_Cmd(TIM1, ENABLE); //使能TIM1 TIM_CtrlPWMOutputs(TIM1, ENABLE);//设置PMW主输出 }[/mw_shl_code]