用STM32定时器8产生38K的PWM波做红外发射试验，为什么开始PWM波隔一段时间然后关闭，就没法打开了PWM波了？

我本仁慈

[mw_shl_code=c,true]#include "infrared_send.h" #include "stm32f10x_tim.h" u8 Infrared_Send_Number = 0; // ?????????ì??·????±·??????????????? u8 Infrared_Receive_Number = 0; //???????ì???????????? u16 Infrared_Send_Data[200]; //??·???Android?????????ì?????? //?????ì??·??? //?¨?±?÷8?¨??2?? //PC7??????PWM?¨, ????38K ??????±?1/3 void Remote_Send_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE);// RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE); //????GPIO???è?±?????? //?è??????????????????????,????TIM8 CH2??PWM?????¨?? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; //TIM_CH7 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //???????ì???? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure); TIM_TimeBaseStructure.TIM_Period = 1894; //?è???????????ü??????×°????????×?????×°???????÷???????? 38K TIM_TimeBaseStructure.TIM_Prescaler = 0; //?è??????×÷??TIMx?±?????????????¤·????? ??·??? TIM_TimeBaseStructure.TIM_ClockDivision = 0; //?è???±??·???:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure); //?ù??TIM_TimeBaseInitStruct?????¨????????????TIMx???±???ù?????? TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //?????¨?±?÷????:TIM?????í???÷??????1 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±??????????? TIM_OCInitStructure.TIM_Pulse = 1262; //?è????×°??????±????????÷???????? TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //????????:TIM????±????????? TIM_OC2Init(TIM8, &TIM_OCInitStructure); //?ù??TIM_OCInitStruct?????¨???????????????èTIMx TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Enable); //CH2?¤×°?????? } void Remote_Send_Start(void) { Remote_Send_Init(); TIM_CtrlPWMOutputs(TIM8,ENABLE); //MOE ?÷???????? TIM_ARRPreloadConfig(TIM8, ENABLE); //????TIMx??ARR?????¤×°???????÷ TIM_Cmd(TIM8, ENABLE); //????TIM8 } void Remote_Send_Stop(void) { TIM_CtrlPWMOutputs(TIM8,DISABLE); //MOE ?÷???????? TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Disable); //CH2?¤×°?????? TIM_ARRPreloadConfig(TIM8, DISABLE); //????TIMx??ARR?????¤×°???????÷ TIM_Cmd(TIM8, DISABLE); //????TIM8 } [/mw_shl_code]

我本仁慈

本来是用另外一个定时器来控制定时器8的开关，不行，现在我只用一个延时函数也不行
while(1);
{
Remote_Send_Start(); 
delay_ms(10);  
 
Remote_Send_Stop(); 
delay_ms(10);

}