简单的GPIO口输出的问题，请大家帮忙看看，是什么地方有问题？

hefei2

我在PA14上接了一个LED灯，但是为什么PA14不会和LED1一样输出啊？是不是什么地方设置不对，请大家帮我看看，谢谢了！
main.c

[mw_shl_code=c,true]#include "led.h" #include "delay.h" #include "sys.h" #include "usart.h" #include "timer.h" int main(void) { delay_init(); NVIC_Configuration(); LED_Init(); GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;//PA14 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); TIM3_Int_Init(49999,7199);//10Khz while(1) { LED0=!LED0; delay_ms(200); } } [/mw_shl_code]

timer.c

[mw_shl_code=c,true]void TIM3_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); TIM_TimeBaseStructure.TIM_Period = arr; TIM_TimeBaseStructure.TIM_Prescaler =psc; TIM_TimeBaseStructure.TIM_ClockDivision = 0; //?è???±??·???:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); TIM_ITConfig( TIM3, //TIM2 TIM_IT_Update , ENABLE ); NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_Cmd(TIM3, ENABLE); } void TIM3_IRQHandler(void) { if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) { TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); LED1=!LED1; PAout(14)=!PAout(14); } }[/mw_shl_code]

[mw_shl_code=c,true] [/mw_shl_code]

郭刘阳

是io口的问题，PA.14和15都是JTAG的引脚，你可以在LED_Init（），里面把那个把JTAG给DISABLE，或者是换个引脚就行了，还有lz你的那个GPIO_InitTypeDef GPIO_InitStructure;要放在delay_init();的前面的

襟湿容颜

你PA口时钟没使能吧

jiutianshenjian

惊天答案： 
1，led接反了
2，你等够5秒没