TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef        TIM_OCInitStructure;	
	uint8_t pin_source;
	
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14,ENABLE);  	//TIM14时钟使能
	
	switch(pinx)
	{
		case(GPIO_Pin_0):
		{
			pin_source = GPIO_PinSource0;
			break;
		}
		case(GPIO_Pin_1):
		{
			pin_source = GPIO_PinSource1;
			break;
		}
		case(GPIO_Pin_2):
		{
			pin_source = GPIO_PinSource2;
			break;
		}
		case(GPIO_Pin_3):
		{
			pin_source = GPIO_PinSource3;
			break;
		}
		case(GPIO_Pin_4):
		{
			pin_source = GPIO_PinSource4;
			break;
		}
		case(GPIO_Pin_5):
		{
			pin_source = GPIO_PinSource5;
			break;
		}
		case(GPIO_Pin_6):
		{
			pin_source = GPIO_PinSource6;
			break;
		}
		case(GPIO_Pin_7):
		{
			pin_source = GPIO_PinSource7;
			break;
		}
		case(GPIO_Pin_8):
		{
			pin_source = GPIO_PinSource8;
			break;
		}
		case(GPIO_Pin_9):
		{
			pin_source = GPIO_PinSource9;
			break;
		}
		case(GPIO_Pin_10):
		{
			pin_source = GPIO_PinSource10;
			break;
		}
		case(GPIO_Pin_11):
		{
			pin_source = GPIO_PinSource11;
			break;
		}
		case(GPIO_Pin_12):
		{
			pin_source = GPIO_PinSource12;
			break;
		}
		case(GPIO_Pin_13):
		{
			pin_source = GPIO_PinSource13;
			break;
		}
		case(GPIO_Pin_14):
		{
			pin_source = GPIO_PinSource14;
			break;
		}
		case(GPIO_Pin_15):
		{
			pin_source = GPIO_PinSource15;
			break;
		}
		default:
		{
			Serial_Send(ERR_SERIAL,"PWM_Init_ERR, please connect xjc\r\n");
		}
	}
	GPIO_PinAFConfig(GPIOx,pin_source,GPIO_AF_TIM14);              //GPIO复用为定时器9	
	
	GPIO_Format_Init(GPIOx, pinx, GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_Speed_100MHz);
	
	TIM_TimeBaseStructure.TIM_Prescaler     = psc;                //定时器分频
	TIM_TimeBaseStructure.TIM_CounterMode   = TIM_CounterMode_Up; //向上计数模式
	TIM_TimeBaseStructure.TIM_Period        = arr;                //自动重装载值
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; 
	TIM_TimeBaseInit(TIM14,&TIM_TimeBaseStructure);                //初始化定时器e
	
	//初始化TIM4 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输出比较极性低
	TIM_OC1Init(TIM14, &TIM_OCInitStructure);                      //根据T指定的参数初始化外设TIM4OC1
	
	TIM_OC1PreloadConfig(TIM14, TIM_OCPreload_Enable);             //使能TIM14在CCR1上的预装载寄存器

	TIM_ARRPreloadConfig(TIM14,ENABLE);//ARPE使能 	
	
	TIM_Cmd(TIM14, ENABLE);  //使能TIM4

几个问题 ：

1. AF_Config的pin_source和GPIO_Init的不一样 是从1~15的uint8_t类型 不是uint16_t的可位带的uint16_t 非常吃屎
   2.我是弱智