str711 xti中断问题急

发表于 2009-8-5 09:06

请教大侠:
////////////////////////////////////////
void XTI_IRQHandler(void)
{

XTI_PendingBitClear();
XTI_ISR();

}

//////////////////////////////////////

void XTI_PendingBitClear(void)
{
  u16 axti;
  axti = XTI->PRL | ((u16)XTI->PRH<<8);
  XTI->PRL &= ~axti;
  XTI->PRH &= ~((axti>>8)&0x00FF);
}
void XTI_ISR(void)
{
fcount++;
}
为什么我每次中断完后,fcount++总是执行两次呢?

发表于 2009-8-5 09:20

XTI->SR=0x00;
XTI->MRH=0X00;
XTI->MRL=0X00;
XTI->TRH=0X00;
XTI->TRL=0X00;
XTI->PRH=0X00;
XTI->PRL=0X00;
XTI->CTRL=0X00;
XTI->CTRL=0X00;

XTI->MRH=0X01<<2;
XTI->MRL=0X00;
XTI->TRH=0X00;
XTI->TRL=0X00;
XTI->CTRL |=0X02;
GPIO_Config(GPIO0, 1<<2,GPIO_INOUT_WP);
EIC_IRQChannelPriorityConfig(XTI_IRQChannel, 2);
EIC_IRQChannelConfig(XTI_IRQChannel,ENABLE);
EIC_IRQConfig(ENABLE);

发表于 2009-8-5 09:20

这样的配置有问题吗?

str711 xti中断问题 急

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str711 xti中断问题急