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问 以下是我使用Pin0.2捕获脉冲，捕获一次就产生一个中断，然后用一个全局变量计数，是否有一些轻量级的做法，为什么不能直接读一个计数寄存器呢？

请各位高手指点，万分感谢！


#include <LPC21xx.H>

void T0isr(void)    __irq;
unsigned long count=0;

int main(void)
{
VPBDIV        = 0x00000002;                    //Set pclk to 30 Mhz
PINSEL0     = 0x00000020;                    //Enable pin 0.2 as capture channel0
T0PR         = 0x0000001E;                    //Load prescaler for 1 Msec tick
T0TCR         = 0x00000002;                    //Reset counter and prescaler
T0CCR         = 0x00000005;                    //Capture on rising edge of channel0
T0TCR         = 0x00000001;                    //enable timer

VICVectAddr4 = (unsigned)T0isr;             //Set the timer ISR vector address
VICVectCntl4 = 0x00000024;                    //Set channel
VICIntEnable = 0x00000010;                    //Enable the interrupt

while(1)
{
;
}
}


void T0isr (void)    __irq
{
static int value;
value         = T0CR0;                        // read the capture value
T0IR         |= 0x00000001;                    //Clear match 0 interrupt
VICVectAddr  = 0x00000000;                    //Dummy write to signal end of interrupt
count++;
                                       
}
答 1: LPC2220具有外部事件计数器 答 2: 那2119有吗？？ 答 3: ZLG在哪里讲了外部事件计数器？ 答 4: 那位贴一段脉冲计数的代码吧，谢谢 答 5: 真的没人在LPC2119上做计数吗？能否贴段代码？？