偶最近做了一个板子，用LPC2148做的，编了一个非常小的程序去点亮一个ＬＥＤ灯，编译时发现一个问题，用＂P0XSET=0x80000000;＂代替＂P0XCLR=LED;＂，以及用＂P0XSET=0x80000000;＂代替＂P0XSET=LED;＂就能把灯点亮，并且可以一闪一闪的，如果调过来的话就没发点亮ＬＥＤ灯．并且用DELAY()去延时的话，如何改P0XSET和P0XSET都没效果，但编译生成BIN文件过程和AXD的调试过程都成功，没报错的．我是用非利浦的LPC210X_ISP.EXE下载BIN文件的,一直弄不清问题在哪，请大侠们高抬贵手，救小弟一把，非常感谢！！源程序就是下面的
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IMPORT Main
AREA Init, CODE, READONLY
ENTRY
LDR SP, =0x40001ff0 ;SP指向4K SRAM的尾地址 BL Main
END
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／／＊＊＊＊＊＊＊＊＊＊＊＊＊＊Main.c＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ #define PINSEL1 (*(volatile unsigned *)0xE002C004)//管脚功能选择寄存器//
#define P0XDIR (*(volatile unsigned *)０xE0028008)//端口0方向择寄存器//
#define P0XSET (*(volatile unsigned *)0xE0028004)//端口0位设置寄存器//
#define P0XCLR (*(volatile unsigned *)0xE002800C)//端口0位清除寄存器//
//#define IOPDATA (*(volatile unsigned *)0x3FFFC007) //IO port data register
#define uchar unsigned char
#define unum32 unsigned long
void Delay(unsigned int);
int Main()
{
unsigned long LED,cl;
// IOPMOD=0xFFFFFFFF; //将IO口置为输出模式
PINSEL1=0x00000000; //将IO口置为GIO模式
P0XDIR=0xffffffff; //将IO口置为输出模式
FP0XDIR=0xffffffff; //将IO口置为输出模
// IOPDATA=0x01;
LED=0x80000000;
while(1){
P0XCLR=LED; <<-------改为P0XSET=0x80000000;就能点亮
// P0XCLR=0x80000000;
for(cl=50000;cl>0;cl--); ／／延时
// Delay(100);
P0XSET=LED; <<-------改为P0XSET=0x80000000;就能点亮
// P0XSET=0x80000000;
for(cl=50000;cl>0;cl--); ／／延时
// Delay(100);
}
return(0);
}
void Delay(unsigned int x) ／／延时
{
unsigned int i,j,k;
for(i=0;i<=x;i++)
for(j=0;j<0xff;j++)
for(k=0;k<0xff;k++);
}
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