LCD怎么搞乱了定时中断和外部中断的作用！！求知道！！！

七月水

我想用LCD显示频率，已经在LCD上显示出了波形和幅度了。当我屏蔽掉显示波形和幅度的语句段的时候就能显示通过串口输出，当没屏蔽掉时候就输出频率错误了！！
外部中断来一个上升沿fh++(频率)
void EXTI0_IRQHandler(void)

{

  if(EXTI_GetITStatus(EXTI_Line0) != RESET)  //?ì?é???¨??EXTI0???·??·????ó·??ú??·?

{  

fh++;

}

EXTI_ClearITPendingBit(EXTI_Line0);  //????EXTI0???·??????

}
定时5秒中断函数

void TIM3_IRQHandler(void)   //TIM3????

{

if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //?ì?é???¨??TIM????·??ú??·?:TIM ?????? 

{

TIM_ClearITPendingBit(TIM3, TIM_IT_Update  );  //????TIMx???????????í??:TIM ?????? 

lz=fh;

fh=0;

}

}


主函数
{

。。。。
。。。。

LCD_ShowNum(160,270,lz/5,4,16);

  printf("%d\n",lz/5);//输出的是频率值（因为定时5秒外部中断上升沿触发一次fh++一次）

delay_ms(500);
}

问题：
当我屏蔽掉// LCD_ShowNum(160,270,lz/5,4,16);的时候就能输出正确的频率值；当我没屏蔽LCD_ShowNum(160,270,lz/5,4,16);时候就显示不正确了，数值在变。

以下是LCD.CDE 一部分程序
{

GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE); 

GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable , ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_9|GPIO_Pin_8|GPIO_Pin_7|GPIO_Pin_6;   //GPIO_Pin_10

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //???ì????

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOC, &GPIO_InitStructure); //GPIOC

    //GPIO_WriteBit(GPIOC,GPIO_Pin_10|GPIO_Pin_9|GPIO_Pin_8|GPIO_Pin_7|GPIO_Pin_6,Bit_SET);

GPIO_SetBits(GPIOC,GPIO_Pin_10|GPIO_Pin_9|GPIO_Pin_8|GPIO_Pin_7|GPIO_Pin_6);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All; //  

GPIO_Init(GPIOB, &GPIO_InitStructure); //GPIOB

//GPIO_WriteBit(GPIOC,GPIO_Pin_All,Bit_SET); 

GPIO_SetBits(GPIOB,GPIO_Pin_All);

 

delay_ms(50); // delay 50 ms 

}

以下是time.c的程序
{

void Timerx_Init(u16 arr,u16 psc)

{

    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //?±??????

TIM_TimeBaseStructure.TIM_Period = 50000; //?è???????????ü??????×°????????×?????×°???????÷???????? ??????5000??500ms

TIM_TimeBaseStructure.TIM_Prescaler =(7200-1); //?è??????×÷??TIMx?±?????????????¤·?????  10Khz??????????  

TIM_TimeBaseStructure.TIM_ClockDivision = 0; //?è???±??·???:TDTS = Tck_tim

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM?ò??????????

TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //?ù??TIM_TimeBaseInitStruct?????¨????????????TIMx???±???ù??????

 

TIM_ITConfig(  //?????ò???§?????¨??TIM????

TIM3, //TIM2

TIM_IT_Update  |  //TIM ??????

TIM_IT_Trigger,   //TIM ??·??????? 

ENABLE  //????

);

NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  //TIM3????

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;  //??????????0??

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;  //????????3??

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±?????

NVIC_Init(&NVIC_InitStructure);  //?ù??NVIC_InitStruct?????¨???????????????èNVIC?????÷

TIM_Cmd(TIM3, ENABLE);  //????TIMx???è

 

}

}

一下是exti.c的程序
{

void EXTIX_Init(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  EXTI_InitTypeDef EXTI_InitStructure;

  NVIC_InitTypeDef NVIC_InitStructure;

  GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable , ENABLE); //??±?jtag

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE);

  GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_0;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; 

  GPIO_Init(GPIOA, &GPIO_InitStructure);

  //GPIOA.0  ?????????°??????????????

  GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);

  EXTI_InitStructure.EXTI_Line=EXTI_Line0;

  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;

  EXTI_InitStructure.EXTI_LineCmd = ENABLE;

  EXTI_Init(&EXTI_InitStructure); //?ù??EXTI_InitStruct?????¨???????????????èEXTI?????÷

 

  NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; //????°??ü?ù?????????????¨??

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //??????????2 

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02; //×???????2 

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //?????????????¨??

  NVIC_Init(&NVIC_InitStructure);    //?ù??NVIC_InitStruct?????¨???????????????èNVIC?????÷

}

}

之所以贴出以上程序是：我想既然LCD函数影响了输出，是不是公用了管脚？还是什么的

希望知道！！！！！











 

七月水

LCD 没和外部中断和定时器公用IO口 怎么就对它产生影响了？？

正点原子

可以仿真看看不？
用JTAG仿真试试吧。