请大神帮我分析一下，这段程序没错误但是引脚没输出

梦月之心提问时间：2017-9-21 13:34 /

void TIM1_GPIO_Config(void)
{
  //PE 8 9 10 11 12 13 14??
  GPIO_InitTypeDef GPIO_InitStructure;
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE,ENABLE);
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11
                              | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_Init(GPIOE,&GPIO_InitStructure);

  GPIO_PinAFConfig(GPIOE,GPIO_PinSource8,GPIO_AF_TIM1);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource9,GPIO_AF_TIM1);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource10,GPIO_AF_TIM1);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource11,GPIO_AF_TIM1);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource12,GPIO_AF_TIM1);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource13,GPIO_AF_TIM1);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource14,GPIO_AF_TIM1);
}
void Tim1_Config(void)
{
//TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseInitStructure;
  TIM_OCInitTypeDef  TIM_OCInitStructure;
//TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

  uint16_t TimerPeriod,ccr1,ccr2,ccr3,ccr4;
TimerPeriod =  (SystemCoreClock / 20000 ) - 1;
  ccr1 = TimerPeriod / 2;  //???1/2 = 50%
  ccr2 = TimerPeriod / 3;  //???1/3 = 33%
  ccr3 = TimerPeriod / 4;  //???1/4 = 25%
  ccr4 = TimerPeriod / 5;  //???1/5 = 20%

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
  //?????
  TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;  //?????
  TIM_TimeBaseInitStructure.TIM_Prescaler = 0; //Timer clock = sysclock /(TIM_Prescaler+1) = 168M
  TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
  TIM_TimeBaseInitStructure.TIM_Period = TimerPeriod - 1; //Period = (TIM counter clock / TIM output clock) - 1 = 20K
  TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_Pulse = ccr1;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

  TIM_OC1Init(TIM1,&TIM_OCInitStructure);

  TIM_OCInitStructure.TIM_Pulse = ccr2;
  TIM_OC2Init(TIM1,&TIM_OCInitStructure);

  TIM_OCInitStructure.TIM_Pulse = ccr3;
  TIM_OC3Init(TIM1,&TIM_OCInitStructure);

  TIM_OCInitStructure.TIM_Pulse = ccr4;
  TIM_OC4Init(TIM1,&TIM_OCInitStructure);

  TIM_Cmd(TIM1,ENABLE);
  TIM_CtrlPWMOutputs(TIM1,ENABLE);
}
/*********************************************END OF FILE**********************/
int main(void)
{
TIM1_GPIO_Config();
Tim1_Config();
}