片子, STR710f
外部中断的程序始下:
//XTI peripheral configuration
////==================================================
void Set_XTI(void)
{
GPIO_Config(GPIO1, 0x4000, GPIO_IN_TRI_TTL); //
XTI_Init(); //
XTI_LineModeConfig(XTI_Line8, XTI_FallingEdge); //
XTI_LineConfig(XTI_Line8, ENABLE); //
XTI_ModeConfig(XTI_Interrupt, ENABLE);
EIC_IRQChannelPriorityConfig(XTI_IRQChannel,3); //priority to 3
EIC_IRQChannelConfig(XTI_IRQChannel,ENABLE); //
EIC_IRQConfig( ENABLE ); //
}
///timer1 设定始下
//时间为100ms PWM
void init_time1(void)
{
EIC->SIR[19] |= 0x00000001; // channel 19 priority 1
EIC->IER |= 1<<19; // Enable interrupt on channel 19
EIC->ICR |= 0x00000001; // Enable interrupts
TIM1->OCAR=5000/2 ;
TIM1->OCBR=10000-5;
TIM1->CR2 = 0x0800; // Enable interrupt and prescale=7
TIM1->CR2 |=19;
TIM1->CR1 = 0x8000; // Enable counter
TIM1->CR1 |=1<<4; //PWM
TIM1->CNTR = 0x1000; // Any value written to this Reg results r
}
///定时中断程序如下:
void T1TIMI_IRQHandler(void)
{
TIM1->SR &= ~0x0800; //Clear the TIM1 interrupt flag
while(1) //等候外部中断进入
{
time1_deal_bit=10;
}
}
///////外部计数中断
void XTI_IRQHandler(void)
{
//void XTI_IRQHandler(void)
//{
u16 XTI_Pend;
XTI_Pend = XTI_InterruptLineValue();
if (XTI_Pend & 0x0100) {
XTI_PendingBitClear(0x0100); // Clear t
}
Display(8); //显示一个数字
}
我看了CPSR 的I F 标志都为0，请dx指点.
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