快速GPIO

只看该作者 · 2010-6-17 21:35

我用LPC2148控制几个LED做实验，用慢速GPIO时很正常，用快速GPIO时全速运行也正常，但是单不调试不行，端口没有输出
程序如下
#include <LPC214X.H>                      /* LPC214x definitions */

#define    LED1 (1<<18)
#define    LED2 (1<<19)
#define    LED3 (1<<20)
#define    LED4 (1<<23)

int main()
{
delay_ms(500);

PINSEL0 = 0x00000000;
PINSEL1 = 0x00000000;
  //  lcd_ini();
IO0DIR = LED1|LED2|LED3|LED4;

IO0SET  = LED1|LED2|LED3|LED4;
IO0CLR  = LED1;
IO0CLR  = LED2;
IO0CLR  = LED3;
IO0CLR  = LED4;

SCS = 0x01;
FIO0DIR = LED1|LED2|LED3|LED4;
FIO0MASK = 0;

while (1)
{
      FIO0SET  = LED1|LED2|LED3|LED4;
   //  delay_ms(500);
      FIO0CLR  = LED1;
   //  delay_ms(500);
      FIO0CLR  = LED2;
   // delay_ms(500);
      FIO0CLR  = LED3;
   // delay_ms(500);
      FIO0CLR  = LED4;
   // delay_ms(1000);
}