Blackfin DSP 531

程序大概就是
// LED操作地址定义
#define pLed (volatile unsigned char *)0x203D0000
#define pSEG_8_0 (volatile unsigned char *)0x203C4000#define pSEG_8_1 (volatile unsigned char *)0x203CC000
#define pSEG_8_2 (volatile unsigned char *)0x203C8000
#define pSEG_8_3 (volatile unsigned char *)0x203C0000

void main(void)
{
unsigned int i,j;
int led = 0x01;

Init_EBIU();

*pSEG_8_0 = NumberData[SEG_ALLLIGHT];
*pSEG_8_1 = NumberData[SEG_ALLLIGHT];
*pSEG_8_2 = NumberData[SEG_ALLLIGHT];
*pSEG_8_3 = NumberData[SEG_ALLLIGHT];

Delay(0x100);

*pSEG_8_0 = NumberData[SEG_ALLSHUT];
*pSEG_8_1 = NumberData[SEG_ALLSHUT];
*pSEG_8_2 = NumberData[SEG_ALLSHUT];
*pSEG_8_3 = NumberData[SEG_ALLSHUT];

Delay(0x100);

while(1)
{
for(i=0; i<=9999; i++)
{
// *pSEG_8_3 = NumberData[i/1000];
j = (i%1000)/100;
*pSEG_8_2 = NumberData[j];
j = (i%100)/10;
*pSEG_8_1 = NumberData[j];
j = i%10;
*pSEG_8_0 = NumberData[j];
Delay(0x200000);
if((led = led << 1) == 0x100) led = 0x01;
*pLed = ~led;
Delay(0x200);
}
}
}
我是刚学的，看不懂#define pSEG_8_2 (volatile unsigned char *)0x203C8000，它到底是定义的是哪块的地址，恳请大家给分析下。